Changing Dometic AC From Analog To Digital Control (wiring explained)

I try to clarify the wiring when you change a Dometic AC from analog to digital controls. I hope this makes it much clearer.
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Due to factors beyond the control of All Seasons Mobile RV Service LLC and Hillbilly RV, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. All Seasons Mobile RV Service LLC and Hillbilly RV assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. All Seasons Mobile RV Service LLC and Hillbilly RV recommends safe practices when working with power tools, ladders, climbing, repairing LP gas lines or appliances, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of All Seasons Mobile RV Service LLC and Hillbilly RV, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained.

[@student6045]

Dude, I was freaking out listening to all of the reviews. You saved me. I am smart enough to follow you sir and I thank you so much. I will say a prayer for you and helping others.

[@hillbillyrv]

Thank you very much.

[@tiffanir1593]

Thank you for the additional video. It was much easier to understand with the diagrams.

[@boelter354]

After watching this video I realized the camper that my girlfriend bought was missing the dc positive and negative coming out of the ceiling which is why it wasn’t working. I ended up running it from a light switch by the thermostat and running it to the top of the ac unit for my power. It’s kind of redneck but it works! Thank you so much it saved me a lot of time. I spent all night wondering if I was missing something and why it wasn’t working the people she bought it from screwed up all the wiring

[@hillbillyrv]

Glad I could help.

[@jimmyneff1695]

Thank you . i had my a/c worked on and it cost $150.00 about 5 months ago . and now its getting colder i put my furnish on and nothing happened. I checked your video and seen my furnish wire was not connected. It works now . Thank You , sincerely Jimmy

[@hillbillyrv]

Glad we could keep you warm tonight. Merry Christmas

[@jimmyneff1695]

Merry Christmas to you and your Family

[@tonybrockway7490]

just got my digital control today now I have to run 12v + and - to the control box, analog did not have 12v, I have fixed everything since I purchased new in 1997, I have been lucky not much has gone bad. Thanks For the Information.

[@stephanegalipeau3740]

Hello from Canada 🇨🇦. I love and enjoy all your videos thanks for being there for us RVers.

[@hillbillyrv]

Awesome Stephane.

[@kevinbennett2540]

Thank you for what you do, I watched all your videos on this and successfully accomplished the conversion. Just one of many repairs your content has helped me upgrade and repair

[@hillbillyrv]

Awesome

[@dporrasxtremeLS3]

@@hillbillyrv Yes! Thanks!

[@deanl3972]

I had to do it today and my RV never done it before so I took my time took me about 5 hours total but I got it done just simply because of your wiring diagram thanks a lot I really appreciate it

[@hillbillyrv]

That's great, glad I could help.

[@ricksmobileservice8246]

Your video is still sought after and being used. Well done sir.

[@hillbillyrv]

Thanks Rick. Where is your mobile service? RVs or something else?

[@crotopoc]

Cannot believe the failure to add a wiring diagram for the product. Thank you so much.

[@hillbillyrv]

That's what I thought when I did my first conversion.

[@MrNobody-gi3gj]

they do not put them in any units as they wish for all the work to be done by techs certified by them. quite silly yet this is how it is done these days.

[@soggybottom23]

I just did this swap yesterday and it was a little intimidating at first trying to figure out how those three wires were going to make that A/C work! I sure could've used this video friday but I got it done!

[@maryhixson624]

THANKYOU SIR!!! You saved us from all this frustration. We were at our wits end. Thank you ,thank you ,thank you .

[@hillbillyrv]

You are VERY welcome.

[@chetusher444]

Good video, I'm a mobile RV Repair Service myself . Your a good teacher. Thanks for the video.

[@hillbillyrv]

Cool. Where are you located? I am in Beckley, WV. Do you watch AZ Expert or My RV Works. Those guys are really good.

[@chetusher444]

@@hillbillyrv I'm in Plum City, WI. Usher's RV Services. Yes I watch both of those guys. They are very good and great teachers. I'm glad I stumbled across your channel. Each of you teach me something with every video.

[@kenknight4560]

Replacing AC on roof and T Stat, this was a great video on the wiring, which was NOT explained well in the instructions. Well done sir and thank you!

[@hillbillyrv]

You are welcome ken

[@FabShopFive]

Thanks diagnosing non working Dometic in 2002 holiday rambler and seems like you’ve been around a RV or two! We’ll be watching more from you

[@rodneyschmuland1132]

After watching your videos, I successfully did the analog to digital conversion. Thanks for sharing!

[@hillbillyrv]

Cool. Glad I could help Rodney

[@daveschutte9797]

Thank you, much more simple than the dreaded wire diagram that made no sense.

[@hillbillyrv]

You are welcome.

[@marjoe69]

You are my HERO, I never would have figure this out. It literally took 30 minutes of careful connecting and we ready to roll again!

[@hillbillyrv]

Thanks David

[@RVHabit]

This is the best step by step wiring directions I have seen. This can be very intimidating but you show how easy it really is. Thumbs up.

[@hillbillyrv]

Thanks a lot

[@jlm10181978]

@@hillbillyrv my analog control works just fine I had to replace my roof unit for a brisk ll will my analog controller work with the new brisk ll?

[@hillbillyrv]

@@jlm10181978 Yes it will.

[@jlm10181978]

@@hillbillyrv thank you for answering so quickly great video by the way I just wasn’t sure if they were compatible as in old and new technology.

[@hillbillyrv]

@@jlm10181978 As long as they still work, the old systems are better than the new. Hang onto the old stuff as long as possible.

[@sheryleeblohm1753]

I Just changed over the 2 units in my 2004 Coachman 5th wheel to the Dometic digital T-Stat and control box. It was simple, after watching a few of your videos and making a sketch of the schematic you have of course. Very helpful, I would have never know what to do without them. Have your wife take you out for a nice dinner, you deserve it. Thanks

[@hillbillyrv]

I'll tell her, but I can't promise that she will take me out, but thanks anyway Sherylee. Glad I could help.

[@chasecoulon5360]

Man I know u got a lot of comments like this but you are seriously my hero I got in to this and was so confused u just made it so easy best diy KZbin video I’ve ever used for help wish more people that worked on vehicles were like you. Your getting a thumbs up and a sub from me thanks man

[@hillbillyrv]

Awesome Chase. Thanks

[@gladyshutton4236]

Diddo on the Best step by step wiring directions! It is exactly what I was looking for! Thank You!

[@hillbillyrv]

Super glad I could help Gladys

[@toddkohrn434]

Just did this to mine and was concerned about 8 wires(6 hooked up) going to 1 wire. Everything seems to be working correctly thanks to you...will know more about the AC once we hook up to higher amp service. Thank you!!

[@hillbillyrv]

The first one I did....I was like there is NO WAY this is going to work.

[@alanross3435]

Great explanation!👍🏻 you should write the instructions for some of the company's out there that have no idea what they are talking about! 😷😷✌🏻️

[@hillbillyrv]

Thanks a bunch Alan !!!!

[@samgarfield3346]

Awesome video, I had the same issue, going from analog yo digital. Already installed new control box prior to seeing your video, just making sure Im meshing with everyone elses problem on this issue. You explained perfectly !!!!!!!!

[@hillbillyrv]

Thanks Sam

[@brentfraysier2444]

This video was very helpful. Absolutely everything covered. Thank you!

[@hillbillyrv]

You are welcome.

[@naomigesler5953]

I wanted to say thank you for the two videos! Only problem with mine was I didn't have 12v wires in my ac hole to goto my thermostat. So I spliced them in with one of the 12v lights and works great. Thanks again

[@hillbillyrv]

Yep I have done that before. Good job.

[@seawalk702]

Hey I'm having your exact problem is there any way you could help me I just need to get 12 V positive and negative from the lights??

[@YOURP0P]

I’m having same problem.

[@TJsVette]

Love it man! I appreciate your help from the other day and now she is up and running again!!

[@hillbillyrv]

Awesome

[@donnabyrd4122]

You totally saved our butts with this video! THANK YOU for posting it!!!!

[@hillbillyrv]

It's my pleasure Donna. Glad I could help.

[@MCScreenPrinting]

I want to sincerly thank you for your video. It was very helpful! Thank you for taking the time to do it. Awesome!!!!

[@hillbillyrv]

Thanks Alberto

[@DcRuss]

Thanks this was extremely helpful, our AC is working perfectly now.

[@hillbillyrv]

Awesome

[@davidbuchanan327]

great info. Im getting ready to tackle this job tomorrow. Mine is a little different so Im taking it slow. I have an older duo therm penguin from 2002 on my Lance truck camper. The control box is not removeable. This is the low profile version with a heat strip. So I guess room was an issue because the control board is mounted next to the capacitors on top. Just not as plug and play as all the videos I've seen. Without this wiring info though no doubt it would take me much longer. Im updating because the thermostat was acting up on my last camping trip. So I figured it was time to get the analog one out. Otherwise this old penguin works great.

[@hillbillyrv]

That is a different beast. I hope it goes well.

[@thebasshunter]

I wanted to see if you might have seen this before? I have a 1994 5th wheel hunting trailer. If got stuck by lightning. So the list of things not working is converter, hot water, furnace and AC. Replace the converter and my light came by on. That’s all. Bought the hot water control board and replaced that. Now the works. Bought the new Digital control box. Watched all 3 of your replacement videos. But my old AC control box does not have 12v cables going to it. Only 4 thermostat wires and 120v. I got the AC to work with the new Digital box. I just had to run exterior wires from the Digital box to my electrical box to get the 12v and I just ran exterior wire for everything for testing. I think the control board in the furnace it bad too. I bought the furnace control board but the connects are not the same as the one I bought. But when I turn the thermostat to furnace it pauses then the ac runs again not the furnace. I know the furnace board is most likely to be bad but should the ac run at all we the Digital thermostat calls for heat??? I just want to see if you have seen this scenario. If I had your email I could send you pictures of what have. Thanks again

[@hillbillyrv]

Set the fan to AUTO on the t stat. If you watch my videos all the way to the end, I believe I go over this. It is also in the paperwork that came with the box you bought.

[@joemolina7795]

Saved me $900. You are a Godsend. Thank you!

[@hillbillyrv]

Awesome

[@lancebickel236]

Thank you! had it all completed but the 2 furnace wires, wasn’t sure if it mattered which one went to which connector

[@hillbillyrv]

Doesn't matter. Just hook them up.

[@adamanderson100]

It’s super easy to do! I watched this video and rewatched it when I reinstalled my new control box and thermostat works like a champ!

[@hillbillyrv]

Awesome Adam. Glad I could help.

[@gregorymarlett1277]

It wasn't exactly the same, but I was able to use the info from this video to make the switch from an old Coleman Mach with an analog thermostat to the new Dometic Brisk 2 with a digital thermostat. I've not yet added the wiring for the furnace, but will do so before the weather changes and I need it. Thanks so much for putting this info out! Liked and subscribed!

[@hillbillyrv]

Cool

[@Hugo-Hernandez]

Hey man I wanted to change my Coleman to domestic as well. Where you able to use the same wiring from the Coleman ac or did you have to run more wires ?

[@radacalone]

Hillbilly that is the best video on the Air log to digital thermostat conversion on the net I have also did this conversion have a question about a Coleman Mark 15 heat pump how to convert from all the demedic penguin two..Any help would be greatly appreciated

[@hillbillyrv]

It is usually MUCH easier to stick with the same brand of AC. Coleman and Dometic use completely different wiring between the coach and controls and between controls and thermostat.

[@tripthompson8009]

I have a mid 90’s Coleman with a 4 wire strand. Can’t locate furnace wires. Trying to replace with dometic, sane control box as in your video. What do I do? Thanks

[@stephanegalipeau3740]

Love love love this video you did an awesome job explaining it helped me out BIG time. I wis tho you would show us how to jump to test with to two kinds of control. the pump and fan with your white board

[@hillbillyrv]

It's easy peasy. Just jump from power to the fan or compressor. Wiring schematic on control box lid will tell which wire is which.

[@marywilson5455]

Hey again. I posted a question/issue earlier today but did it as a reply on someone else's post. I think you responded but I can't find that person's post -- and I didn't get an email about it. Regardless, after drawing 3 diagrams (pigtail to new Dometic B59516.xx1 AC, wires from heater/12VAC, and 6-wire mess from new LCD SZ thermostat) and matching up 12+ with 12+, t-stat with t-stat, etc, I now have functioning AC!!!! Love the video too -- exact same stuff that I have -- only I got stumped with 12VAC coming from the heater so I got out the heater installation papers and studied the wiring diagram. AC!!!! Whoop!! Thanks! Oh, if you did reply to my other questions, would it be too much to ask if you would please copy and paste it here? Thanks again! Sign me Cooling Off in 102° Heat in Texas!

[@hillbillyrv]

Awesome. Glad you got it figured out.

[@javiergutierrez9705]

Awesome videos. Myold unit went bad, installed a dometic blizzard nxt. With heat pump. But now im getting E1 code and nothing is coming on. Do i need a special thermostat for this particular unit?

[@hillbillyrv]

Not sure on that. You might need to talk to Dometic about that.

[@prairieskycam]

I have a question. First of all, thank you for making this video! It has shed a lot of light on this installation. I don’t have a 12v positive and negative so I’m confused as to where to connect the corresponding wires on the new 4 conductor harness. The old control box had Blue, Orange, Yellow, and Red wires coming out going to the thermostat connecting to Blue (H), Green (G), Yellow (Y), Red (RC) respectively from the thermostat. Any help is appreciated. Thank you.

[@hillbillyrv]

You are taking out an Coleman control box and installing a Dometic. You will have to get 12v DC wires to run the new control box.

[@BuzzJones]

What is the smallest Gauge wire can I use in my RV for the 12v Power and Negative wires. I screwed up and thought I could just dbl up 18 Gauge Thermostat Wire for the 12V Power and dbl up the same for 12V Negative ?? Uhg

[@hillbillyrv]

Not sure....there is probably very little current used to run that board.

[@JoeFreud]

Thanks so much for your videos. I was successful at getting the ac running but not the furnace. 95 holiday rambler endeavor le. Do I need to install a second thermostat for the furnace?

[@hillbillyrv]

This control bow will run the furnace if it is wired correctly.

[@alexiscristy2838]

Great video... We have a 05 winnebago horizon 40KD and we are pulling the old basement AC out and replacing with 2 dometic rooftop units. The previous furnace wires are hooked up to the old thermostats, but the 2 blue wires are used in conjuction with the 12v- and 12v+ that run to each furnace, for the new units will it matter which wires are hooked up? I was planning on just using the same wires that ran to the thermostats before... or does it HAVE to be one of the 2 blue wires?

[@hillbillyrv]

You will have to test the wires to see what is what. Depending on what kind of HVAC control that has. It could be a lot of work to do what you are planning. Is the RV prewired for roof units?

[@thebasshunter]

Can you help out again. My 1994 hunting trailer was hit by lightning. Not work be the microwave and refrigerator. I have got everything back working but the furnace I had to replace boards in everything. I put the new Digital board in my AC and I have re placed the board in my furnace but I’m not getting 12v at the furnace. My question is there any voltage that comes out of the two thermostat wires for the furnace out of the Digital AC box? I should get 12v DC at the relay on my 1994 Hydro flame furnace or/ & 10amp breaker on the furnace? I don’t think anything is coming out of my Digital AC box?

[@hillbillyrv]

12 volt DC for furnace comes from the coach. Down at the furnace you will have a red, yellow and 2 blue wires. Red pos yellow neg and blues are T-stat. one of the T-stats wires might have power on it, but that is not the main power source for the furnace.

[@chipkieffer9403]

Can I use a regular house thermostat with the controller or are they different? My wall stat broke. Can I put a Honeywell in its place? If so where do I put my three wires on the honeywell

[@hillbillyrv]

Just get a new Dometic thermostat. They are different.

[@MrGwh89]

Great overview. Thanks. I believe things are wired correctly. The AC turns operates correctly, however, when I engage the heat, a blow a fuse. Ideas?

[@hillbillyrv]

Something is shorted to ground somewhere. Hard to say where, without being there to test.

[@YOURP0P]

I’m having same issue. Did you solve your problem?

[@kreutztimothy]

Thank you Sir, made this repair so much more easier.

[@hillbillyrv]

Awesome

[@kreutztimothy]

Question: the box I received has the same male wire pins as the wire connector coming from the AC harness. Also, there's only 5 wires in the connector in the box, and 6 in the AC harness....I also noticed the wires don't correspond to the harness, so I'll need to rewire either the box or the AC harness... It appears the solid yellow comm wire is missing from the box harness.... Have you seen this before? I did confirm "according to Amazon" the kit was compatible with my AC...

[@kreutztimothy]

Fixed it!... Dug through the trash got the old control box and realized I can just take the old plug out of the box and swap it into the new box.... Crisis diverter😁.... Oh yeah, the old plug also only had 5 wires coming from it as well.

[@hillbillyrv]

@@kreutztimothy I have never had to rewire that.

[@kreutztimothy]

@@hillbillyrv interesting... Well, maybe someone added the wrong plug on the box... Either way, it's now working and starting to finally cool down... Thanks again for the info.

[@michaelroach962]

I have a flat ribbon wire that runs from the control box to the thermostat. Can I cut the ends off and use that wire. Great video it helps a lot. Thanks

[@hillbillyrv]

Ribbon wire. Wow haven't seen that in ages. Is it a dometic? If yes, I don't see why not. Just make sure that you have a good 12V power and ground for the new control box. (probably not in the ribbon wire)

[@kapm8732]

Can you tell me what wires to hook up to what color wires when we dont have 12DC because it's a park model

[@hillbillyrv]

With this control box, you have to have 12 volt pos and neg.

[@mikev9088]

Is the new thermostat.and control box, essentially a soft start kit? I noticed it stages on the fan motor first followed by the compressor.

[@hillbillyrv]

No. Even the old ones had a delay between the fan and the compressor.

[@whitetailsrifleshunting9801]

Two darn days I couldn't find anything love you hahaha

[@hillbillyrv]

Well, thank you William. Please don't forget to subscribe.

[@janineshumaker6075]

Looking to replace a Duo-Therm part #3308448.004 will the unit you use work?? Thank you so very much for all you teach us all❤️

[@hillbillyrv]

As far as I know. The single zone digital Control/T-Stat works with all Duo-therm ACs that don't have preinstalled control boards. You need to check with Dometic to make sure. Thanks Janine

[@seawalk702]

Hello please help....Hey I'm watching your video and I don't have 21 V + or negative wire . It's a camper trailer all I have is the 6 pin harness thermostat wires nothing else what do I do??

[@hillbillyrv]

If your camper was wired for a Dometic AC with a wall thermostat, then it will have all the wires you need. If not, then you will have to run your own wires.

[@edpatton99x]

i installed a Dometic A/C following your wiring clip and it works awesome. The only problem is the fan is blowing backwards. The 110 is black to black and white to white. Should i reverse them?

[@hillbillyrv]

That should not be possible. Don't take this the wrong way, but are you sure?

[@adamtitus4336]

Hello. Enjoy your videos... explained very well. A friend has a 1995 RV with original Dometic DuoTherm system. Having to upgrade from analog to digital. There is no furnace wires nor 12 volts in the ceiling opening. The 12 volts is at the thermostat on the furnace side wires... RH & W on the old coil type thermostat. Got a hold of the local big RV place and gave them the model numbers of the control box and was given a box just like you replaced on one of your videos. Need some advice what I need to do to replace old box. Thanks so much.

[@hillbillyrv]

Hi Adam. You will need to get 12 volt DC positive and negative to the new control box for it to work. If no furnace wires there, is the furnace on a separate t-stat all by itself? If necessary you can buy a doorbell transformer (just like in your house) to put up there to get 12 volt.

[@adamtitus4336]

@@hillbillyrv The old Duo Therm thermostat had heat and AC. When I removed the old thermostat, there are two low voltage cables feeding it. One had two wires: red (RH) and white (W.) Voltage between the red and white had 12 volts. The other has white (Y), green (G), red (RC), and gray (H). Letters in parenthesis are terminal location's on thermostat. No volts across these.

[@adamtitus4336]

@@hillbillyrv Let me ask you this... since the furnace wires are not up with the AC control box, could I stack the thermostats? If I install a 12v transformer where the control box is in the ceiling, wiring according to instructions, and using the AC low volt cable wires use 3 of the those wires to the digital thermostat that came with the kit for COMM/GRD/+12v terminals. Then for the low voltage 2 wire cable that has the 12 volts use a Honeywell RTH111 digital thermostat, which I have, just to operate the furnace? The wiring on that would be the 12 volt red wire on the RH terminal and the white on the W terminal. Think that might make things operational? Another thing... doesn't the 12 volts need to be dc on that transformer? Saw a few LED lighting 120 volt to 12 volt dc transformers that were reasonably priced. Thanks again.

[@garrymullinix595]

This is a good video, however should i need to disconnect the 12V battery and the shore power before disconnecting units such as themostat and control box?

[@hillbillyrv]

Yes

[@chilichad]

Thanks for your time to make these informative videos. So I want to hook the same thermostat to just heat. Where do my red and white wires connect? Thank you

[@hillbillyrv]

That wont work. You just need a simple 2 wire thermostat from Lowes or Home Depot. if the only thing you are running off of it is a furnace.

[@fidelcarolino093]

That was a very good information video! I do have a question, My AC doesn't run because the thermostat shows E1 or communication error. Would you kind enough to share me how to fix this. I have Dometic DuoTherm 3313107.076 OEM S/Z Air Conditioner Control Board C/F with Dometic single zone thermostat. I change the wiring from thermostat to the control board (replacing those telephone wires) still shows E1. If you could help me on this I highly appreciate.

[@hillbillyrv]

I believe the E1 code is a loss of communication.

[@stephenleggitt3679]

I installed my new control box this spring and the ac side works great!! However I think Camping World sold me the wrong control box. Mine doesn't have the 2 spade connectors for the furnace on it. I've got the 2 blue wires coming out of the new box wire nutted to the 2 wires for the furnace, but my furnace won't turn on. My new box has another hookup for what looks like a heat strip. My trailer doesn't have that. Is there anyways to get the furnace to work? I'm in Indiana and the fall weather and it's getting down into the low 50s at night.

[@hillbillyrv]

I don't know what they sold you. No spades for the furnace wires? 2 blue wires coming out of the control box? If you touch the furnace t stat wires together, furnace should run. If it runs then you have a control problem. If not, problem is in the furnace. Don't forget there is a delay, so you have to hold the wires together for several seconds.

[@garymurphy9180]

Thanks for the info video on thermostats. Question : In an older camper without a wall thermostat, Can a wall thermostat be installed into a ac unit where the compressor already cycle on/off but the fan runs continuously. The though is trying to install a wall thermostat that will cycle the fan & compressor on/off at night so as not to get up and turn ac unit off. Thanks, Gary.

[@hillbillyrv]

It can be done. You would have to run new wires for everything except the 110 volt ac

[@garymurphy9180]

@@hillbillyrv Thanks

[@jeffmacinnis1868]

Great video. I have a dometic Duo therm 57915.531 that has a ir remote control and sensor that uses a Phone cord that doesn’t work. It runs heat as well .What new digital control box model can I put in to replace it? Thanks for your time

[@hillbillyrv]

That is a good question Jeff. That translates into......I have no idea. I didn't know that dometic had an infrared remote.

[@jeffmacinnis1868]

@@hillbillyrv here is a link to the remote manualzz.com/doc/32860057/duo-therm%C2%AE-infrared-remote-control-unit The front of the control unit says comfort control 3103463 or use analog control 3107541 maybe that can help thanks again

[@wesstafford5609]

Great video! I've postponed rewiring my conversion from analog to digital for weeks because of a lack of online info. I finally found your 2019 video yesterday which answered enough questions to get me going. (Didn't find this video until today.) Yesterday's conversion was unsuccessful, possibly because I ignored the furnace connection from control box to thermostat. I'll re-check everything else based on this video, but would unconnected furnace wiring be a problem?

[@hillbillyrv]

Thanks Wes. Only if you want the furnace to work. ha ha Not hooking up the furnace wires won't affect the AC, but not hooking up the freeze sensor will.

[@alonsogallo8955]

Great video. Realistically the only video that explains how to wire a dometic thermostat. Is there any way to make a dometic blower cut off when the compressor goes off? My blower stays on the whole time.

[@hillbillyrv]

Yes. Put the fan on "AU" Thanks for watching

[@alonsogallo8955]

@@hillbillyrv Would that be on the thermostat or do I have to go into the control box? Or maybe my thermostat is just an older version of the captive touch.

[@hillbillyrv]

@@alonsogallo8955 On the thermostat. The fan positions are are Low High and Auto

[@alonsogallo8955]

@@hillbillyrv Yes. Saw that when I got home. Thank you very much!

[@hillbillyrv]

@@alonsogallo8955 No problem

[@jacksather9417]

Hey man thanks for the video! I have the same old relay box you took out with a brisk dometic ll and it’s hooked up to a lux Wi-Fi thermostat. Should I upgrade the relay box or just plug and play with the new fresh jet 3 I just bought? Also what temperature should the blower motor be running at? Thank you so much!

[@hillbillyrv]

If the old analog still works, keep it and some of those fan motors seem to run really hot.

[@jacksather9417]

For some reason my 20 amp breaker pops for the new ac hooked up to my old relay board with lux thermostat. Doesn’t show communication terminal like the micro air or the dometic thermostat you installed on the videos for the new control board so I’m either going to try to replace the circuit board or change relays and hopefully keep my thermostat if I can get the wiring figured out, is there anything else that could possibly make the ac trip to 20amp120v breaker? I have absolutely nothing else even plugged in or running in my Rv! Have my electrician Freind coming out today to help me check it out. Thank you so much for any advice, idk where I’d be without your videos thank you a lot

[@hillbillyrv]

@@jacksather9417 Tell your electrician friend that the AC should only pull about 15 amps total after it is running for a while.

[@gta4200]

Hello there, i have a 2001 Weekend Warrior toy hauler. My furnace is on its own thermostat a d my A/C is mounted in the ceiling with a rotaryswitch. Do they have a universal adapter so I can have 1 thermostat to control both units. Thank you

[@hillbillyrv]

Not without doing a lot of custom wiring.

[@meseahunt]

just swapped out my dometic brisk2 with a freshjet3 and guess I am lucky cause my analog still works... good info in case though 🤠

[@hillbillyrv]

Nothing wrong with analog.

[@-KenBullard-]

Thanks for this video. Do you have one expanding on this conversion that covers the thermostat wiring, mechanical to digital thermostat? (I have 30 years residential/commercial HVAC experience but no RV experience.) Thanks for your help.

[@hillbillyrv]

kzbin.info/www/bejne/j57PgImYZ6iimrc Check this one out Ken

[@hillbillyrv]

Here is another one kzbin.info/www/bejne/pZaQo6Bmd7KSoJY

[@jameskabel9405]

I replaced my Honeywell thermostat in the summer and now it's winter and the heat does not come on. The last thermostat had a toggle switch, remotely mounted, that went to the green and white wire to the G terminal on the thermostat. Also the W terminal on the old thermostat had another black wire attached to it. I have pics to show how it was hooked up. The AC has worked but I now have no furnace. Any thoughts, it's getting cooooooldd!!!

[@hillbillyrv]

I keep telling people that I have never seen a household thermostat work on an RV HVAC system. Every time I say that, people say "I have one on my RV and it works great". I believe you have another example of how well that works. That's my 2 cents worth. My recommendation is, switch it all back to RV controls and t-stat and be done.

[@PatJohnston]

grwat advice - clear, concise & very helpful!!

[@hillbillyrv]

Thanks…..I think

[@PatJohnston]

@@hillbillyrv *great

[@fran10494]

Very nice instructions and it worked perfect... Thank you...

[@hillbillyrv]

Great

[@aa300zx]

Hey Hillbilly great video, thank you for all the info, if you have a minute please let me know if this units can be installed in a cargo trailer, I have a cargo trailer ready for a hook up, but I notice that it does no have a 12V. DC + and a 12V.DC negative up in the hole, what I have up there is the power supply and the wire for the thermostat only , nothing else, is there a way to install this unit in a cargo trailer?? thank in advance for any advise, i really appreciated.

[@hillbillyrv]

You will have to run a 12v DC Positive and a 12v DC negative up to the hole and then it will work. Make sure you have at least 3 wires to go from the control box to the thermostat.

[@aa300zx]

Thanks again for the prompt respond, my biggest issue is that the trailer cargo trailer doesn't have battery on it, with that said, since I need 12v DC + and 12v DC -, can I install in that hole under the Ac unit a small doorbell transformer from the 120 V converting to 12 v, would that be possible ?

[@hillbillyrv]

@@aa300zx That should work.

[@aa300zx]

@@hillbillyrv awesome, I'll try to do that and I'll let you know if works... thanks again for everything , you are best>>>

[@tomb1734]

I have a Class A Fleetwood with two Dometic AC/Heat pump units. One went bad and they are both 15 years old so I decided to replace both. I know I can handle switching these with the same unit but what if I want to go with Coleman since I'll get 200BTU more from each. Can I switch these and use the same digital thermostat? Any advise/help?

[@hillbillyrv]

Do yourself a favor and stick with the same brand.

[@worminators1]

The kit that you have in your Amazon Store with white thermostat, that includes circuit board also, correct?

[@hillbillyrv]

Yes

[@bradpayne1265]

Also my furnace doesn't work, do I have to have something plugged in there ?

[@johnosullivan6620]

Wow took me two times of watching both videos but i think i get it! The voltage for the two furnace wires should be 12vdc correct? Thanks!!

[@hillbillyrv]

One might be, but not both.

[@corylucas3774]

This video is a huge help. I have a gas furnace and the Blue and white wires that come out of my old analog control box goes to a white wire and that leads down to the furnace and the other blue and white wire coming out of the control box is tied to the Red wire and then to the 12+ from the trailer. should I make a pig tail with a one of the supplied connectors and run from the 12+ to one of the furnace wires on the new control box and plug the other white wire from the furnace into second furnace connection on the new control box.

[@hillbillyrv]

Just use my video for guidance

[@corylucas8225]

@@hillbillyrv I did watched all of your videos pertaining to the Subject of Furnace ac and thermostat wiring. I only have one wire coming out of my furnace going to one of blue and white wire on the control box, The other blue and white wire goes to 12+ wire. Is there a video I missed that addresses this. Thanks for your help.

[@hillbillyrv]

@@corylucas8225 No you didn't miss anything. I don't know what you have going on there.

[@KrazyAssKatzen]

Thanks there, Hillbilly! I was wondering how I was going to do this changeover. It's funny that a simpler system is more difficult to figure out than the one that was in there. Hopefully it will actually fix my problem once the new control box is in place.

[@hillbillyrv]

You are welcome

[@karenlynch1950]

Ty so much for your help. Have a question. Would it be possible to recieve a call

[@hillbillyrv]

Go to Hillbilly RV on facebook and post the question there please.

[@underdogz75]

I'm changing from a coleman mack 3 to a Dominic Ac With a digital thermostat like the one you are using. there is only 4 wire going to the old control box, and the other 2 wires 12+ and 12- to furnace are down at the old analog thermostat not running up to ac control box do I have to run those 2 wire 12+ 12- to furnace up to Ac control box to finish

[@hillbillyrv]

You have to have DC + and - up at the control box.

[@gelvincastillo6133]

Hey there. I’m installing a new AC until and the fan isn’t blowing air, any idea why this is happening? Is not stock though, I’m also replacing the thermostat. I’m thinking I mixed some wire’s. Thanks so much in advance

[@hillbillyrv]

recheck the wiring for sure. make sure the fan is not stuck.

[@gelvincastillo6133]

Fan is working now; Thanks for this video. I’ve watched like 50 times!

[@MarcRoseVetteNuts]

Thank you for taking the time to explain the wiring.

[@hillbillyrv]

You are welcome

[@pauly730]

I am looking to add a 3316230.700 Control Kit to my B57915.711co with optional heat strip 3314998.000, will this control work with the ac and optional heat strip? Thanks.

[@hillbillyrv]

You would need the control with the heat strip option.

[@zacharywalker524]

my old control box didnt have any wire coming out of it. where do i connect the 12v dc+ wire from the new control box when there isnt one from the coach?

[@hillbillyrv]

In order to use this control box, you need ALL the wires I discuss in this video. If you are missing wires, then you will have to run your own.

[@bradpayne1265]

I have no furnace wires at ac unit, but had 2 wires at thermostat along with a separate wire with 7 tiny wires inside. There's also no 12v at ac unit, tried running 12v from light but don't know where to complete circuit. ( putting in new thermostat and box dometic ac.)

[@hillbillyrv]

You have a mess.

[@YouTuber-lr5fq]

Question. We changed our rv ac from a analog to a digital about 6 months ago and we have had nothing but issues. Do you knowwhat could be causing our new dometic brisk air ac to turn on and off on and off and sometimes just turns off completely when it shouldn't?

[@hillbillyrv]

Perhaps a problem with the installation or a problem with the components that were installed.

[@goalie2998]

I'm lost so bare with me. We have a class c with single ac unit. My dometic t stat had an E4 error. Using google I found this to be an out door temp sensor. I also found that my unit doesn't have an out door temp sensor. My t stat has a phone cable 4 conductors and an RJ-11 Jack. Also my control box is on the roof. I've opened it up and there are no real part numbers on the controller to speak of. I thought I could simply buy a new digital t stat with the RJ-11 jack and be good to go. However the new t stat had no display or led activity. Any tips for this ? I believe I need a new controller just not exactly sure which I should get ?

[@hillbillyrv]

If the control board is a genuine Dometic, it has a part number on it. Are you sure it doesn't have an ambient temp sensor? It just screws on the AC pan up top and it will have pinkish red wire.

[@bkdft09]

Hey brother. I've changed from a Coleman to a dometic.....I had to buy a control box and t Stat. My control box is different from yours..... it has the 6 pin plug... and 6 wires about 6 inches long coming from the box..... for the furnace and 12v power. It also has 2 ports that look like a phone jack. My question is where do I tie the communication into? Thanks

[@hillbillyrv]

It sounds like you have a control box for a muti-zone thermostat. That ain't what this video is about. This video is for a single zone t-stat.

[@bkdft09]

Thanks for the response. That makes total sense.

[@Ls4u21]

Thank you for your help. Much appreciated.

[@hillbillyrv]

You are welcome.

[@JSTANN1982]

I bought just a thermostat not knowing I needed to change the control box in the ac unit.. what's the part number on your control box.. I don't wanna get the wrong one

[@hillbillyrv]

Here in my Amazon store under parts www.amazon.com/shop/hillbillyrv

[@russreinoehlsr6017]

Was wondering if you could help ? I have a Coleman Mach heat a/c unit. On heat cycle when it get on temp it will shut down. Then it will click on off on off. For a while. I looked for a temp differential setting but didn’t see any. Acts like there should be more of a variance between on and off so not to be clicking on and off at thermostat so fast the unit in roof can’t react. Or is thermostat bad ?

[@hillbillyrv]

Hard to say without seeing it, but I would be suspicious of the T-stat

[@JoeFreud]

A couple of differences in my 95 Holiday Rambler. In the ac hole there are no wires that go to the furnace. At the thermostat there are power wires and ground wires coming from a floor harness. The old thermostat has a large circuit board in it, not just a slide temp indicator. So, do I need to hook anything to the two spade connectors on the new box? And if so what would I hook them to? Also what would I use to comm with the furnace at the new thermostat? Please let me know how I can pay you for consultation if you want to try and solve this one. Thanks, Joe

[@hillbillyrv]

Sounds like you are trying to replace a Coleman thermostat with a Dometic. You are in for a heep of trouble.

[@JoeFreud]

@@hillbillyrv it's a Duo-Therm by Dometic. Tried to send you a couple of pics through this thread but it won't take them.

[@hillbillyrv]

@@JoeFreud Must be some rarely used system. Sorry, I can't help you.

[@EstebanArellano-o3r]

Where do you reccomend i get the 12v + supply from the 4 pin connector

[@hillbillyrv]

You have one at the old Dometic control box, use that one.

[@christinemartin-roque5585]

I installed a new AC unit in my RV. I had to rewire for the digital thermostat but even after this video I am still a bit confused as to where the furnace wires connect. Can you look at a diagram and tell me what I need to do?

[@hillbillyrv]

I have several videos on this subject. Maybe some of the others may answer you question. Dometic provides 2 female spade connectors to crimp onto the furnace wires and the are only 2 male spade connectors on the new control box. That's where they go.

[@marywilson5455]

Hey. Here's my issue with the heater wires.... I have 2 double wires (one is W/WG and the other is W/WR). One set will go on the female spade connectors...but which ones?? Also, I took a buttload of pics but still am having an issue from new Dometic B59516.xx1 to digital 3-wire Dometic t-stat where my old t-stat was 6 wire. What goes with what from the 3-post t-stat to the 4-wire harness? Oddly, I do not have dedicated 12+/12- DC wires... How is it that the old AC (same model number but no B and xx was 33) worked with no dedicated wire? Furnace R/RW are hooked up to 12-/12+ at Furnace.... Any ideas are welcome.... Thanks.

[@afs7014]

Just replaced a Dometic Analog thermostat with digital thermostat and control box in A/C compartment. Your video matched the schematic on my new control box. Getting a E3 code on new thermostat. Thermostat instruction book says E3 means "shorted indoor temp sensor" Tested wires in furnace that go to temp sensor; for continuity and ground. Tested good. Tested heat sensor. No ground on either terminal. Contacts in heat sensor are "normally closed". We disconnected the two blue wires from the furnace to the thermostat. Then touched the two blue wires together on furnace and furnace works as it normally would/should. Also tested the two wires from furnace to control box for continuity and they tested good. Any ideas?

[@hillbillyrv]

Not sure what you are working on. These single zone T-stats dont have separate indoor temp sensors and an E-3 code is communication error. Never seen a furnace with a heat sensor.

[@tonygatto48]

I kinda missed what the yellow wire going back to the t-stat ( you called it a signal wire) hooks up to...

[@hillbillyrv]

Communication wire hooks to the communication terminal on t-stat

[@udontneedmyname9934]

You mention the -12vdc black wire. can I tie that to the ground wire from the 120v ground wire?

[@hillbillyrv]

You can, but if you have 12 dc +, you should have a 12 dc ground too. Probably best to use that if you have one.

[@ronniewetherington509]

That was a very good information video! I do have a question. I have my new AC and Tstat wired as you instructed. Recently, I noticed the AC unit does not shut off if fan is set to auto when the Tstat reaches the set temperature. The fan will momentarily stumble/shut off but the compressor continues to run and in just a matter of seconds the fan turns back on. This cycle continues over and over. The compressor will shut off if fan is set on High/Low. Any ideas why this is happening? Otherwise everything cools, heats fine.

[@hillbillyrv]

New board going bad? Hard to say

[@ronniewetherington509]

Ok Maybe so? Are yo speaking about the board in the control box?

[@hillbillyrv]

@@ronniewetherington509 yes