Thermostat Wiring

Today I want to talk about how simple a thermostat really is how the common and hot wire goes to a transformer, how you tie the white wire for the heat strip, connect the green wire which controls the indoor blower and the yellow wire (compressor) directly with each other from the thermostat in the event you have a an emergency where your thermostat goes bad, you can use the system in the heating cycle by tying the red wire, the yellow wire and the green wire together in an emergency situation or if the outdoor heat pump is not working you can tie together the white wire, the green wire, and the red wire. In the summertime for cooling you would tie the yellow wire, the red wire, and the Green wire together. If you have any questions please visit our website or check out our other videos on this and many other HVAC topics.
Thanks for watching!
- David
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Follow me on Facebook: / david-jones-ac-1010702...

[@JesseWitters]

Great explanation but your video was upside down

[@Iamacthepromoter]

I thought i was bugging

[@scottytomcat4267]

This is one of the best videos I've seen a long time excellent excellent video thank you

[@allach1772]

Thank you David, very easy to understand and straight forward videos. I am trying to troubleshoot Goodman heat pump. Now I am equipped with some good first troubleshooting steps for my handyman to execute. You right it’s not rocket science, but many folks struggle to understand it all, simply because there are so many components in a heat pump. I think you simplified them quiet a bit for sure. There are other things as well such as pressure switches etc, but overall I think this video is solid. I like it... tomorrow I will be doing some pressure testing along with evacuation procedure and some thermostat troubleshooting. Note I am just home owner not HVAC tech. I was thinking now that I run my whole house on solar, maybe I will also install heat strip.... or maybe my 2nd stage heat... or should I say 3rd.... I have radiators in my house heating up my house with tankless water heater.... I wonder if I can hook up my thermostat to all 3 things.... heat strip.... and my tankless water heater..... I want to achieve the following.... by default heat pump heating my house with forced air... then if it gets cold... heat strip comes on.... then if it gets super cold.... my tankless water heater turns on.... Note my tankless water heater uses gas which is cheaper than electricity ....however I got solar panels now... so I don’t care about electricity usage anymore.... hence by default I want to use heat pump forced air.... and only have tankless gas water heater heated radiators to come on only if it’s a lot colder below 32 degrees for example.... So do I just hook up my tankless water heater as the second stage to w2 wire? I am a bit confused... I don’t want my heat boiler to work when my heat pump is working, and want it to turn on automatically.... when it’s colder than 32 degrees.... I kind of like strip heat since it gives immediate satisfaction as well.... when it comes to forced air.... but I don’t want to operate on it for a long time.... Only initially just to give me initial quick heating satisfaction in my 1500 square foot home.... but then have itself turn off automatically when it gets warmer and boiler used instead.... Is it even possible to do? Or am I way overboard here? Maybe I should use if this then that automation with Alexa integrated feature to program tankless water heater to turn on while having heat pump turned off.... I haven’t wrapped my mind around all of this yet.... if you have any suggestions let me know. Thank You so much.

[@jayshah00729]

My electrician messed up the wiring. Can you please let me know how my wires should go in the thermostat? I have a blue wire, green wire, red wire, white wire. Your help is very appreciated. And I have the same thermostat as shown in your video.

[@RanjivJain]

This video is coming in as "upside down" if it was rightside up that would be awesom!

[@guillermotolentinogarcia4957]

You put the same cable colors for heat pump and cool...what's the difference on that?

[@tellywu7552]

great video, but i only have black, brown, yellow, orange, green wires coming out from my wall, there is no white or red wire, how do i connect them?

[@vincevincenzi8896]

I have a drown wire s2 and gray s1 everybody talks about common colors but not these . I have trane ac works but face on thermostat frozen. Tried 2 different Honeywell’s . Customer service very bad . I know one is outside thermostat. Also have white with jumper(w1 x2). New thermostats don’t use s1s2 so where do these go. 8 wires in all (heat pump). Hope you can help. Thank you .

[@markharvey9688]

should the fan come on the same speed with emergency heat as with normal heat?

[@mohammadnadeem6137]

very good jobe

[@DynoSauR4Truth]

What's the difference on a Trane heat pump that has both Aux and Emergency heat? All electric split unit.

[@jamiecollins228]

All I have electric furnace I just put it in my self from Scratch ducking in all it to but my light bill is high and it dont get hot hot and iam only using green wire, red wire,and white wire what am I missing iam running double 60/60 breaker . It just takes longer to heat house up

[@marinomosser8396]

I did not even finish the video yet. I had to go leave a comment. This video is what people need. Thank you

[@javeedhvactechnician7760]

kzbin.info/www/bejne/lZitf3-abdR0iJosi=UlshdXNxQANenmXR

[@cygnetsxsirens]

You are not lying about that!!!!

[@rochellearos5160]

What color does the green wire go to on an ac unit

[@stevozz2]

So at 7:12 of the video your diagram shows yellow green and red for heat and also yellow green and red for a/c . I am confused?

[@dzamb]

Am I the only one seeing an upside down video?

[@Camane53]

Do any of you realize this video is upside down?

[@jaimeparadise]

at 4:05 he shows Heat cycle connecting Red/Green and Yellow but THEN.. At 5:58 he connects the SAME wires red/green and yellow for a Cool cycle.. Which one is which??

[@Dasborg]

Wonderful video, in fact the best video. Thank you David for being thorough in your presentation.

[@meredithbrimicombe4042]

This video is great i am trying to put an old ptac in my shop but not sure where all the wires go on unit letters on pins not all the same i would just use display pad but looks like wire harness not as it come out of condo they unhook to or would have got a picture before removed its is older unit pthe1501uaa looking for a little help

[@FirstReviewer]

Great Video. It is nice to know that so many viewers picked up on the "Missing Orange Wire" in the cooling section. I take it that most unit's reversing valves come in the "Heat Position." Just trying to learn a little bit about the workings of a heat/cooling pump. FR

[@ruben4414]

That is what I am looking for. He used the same wires for heat pump and Cool

[@viviancampbell9942]

This guy is the best! He explains EVERYTHING. He's the first one I've found that goes through trouble shooting. Glad to have him out there.

[@CThrew]

He started off this video by stating that ppl make this so complicated...yet he films it upside down

[@jeremanecain369]

I'm lost at the end of the video you did the heat and the ac the same way. So do I add orange? I'm trying to cool

[@sirmuff01]

Thank you mr. Jones at this moment I am having problems and I think it's my thermostat. Thank you for helping God bless

[@cjwetzel22]

In your hand drawing, you forgot to mention the O wire in either cooling or heating.

[@zoltar242]

Amazing! I love folks that share their expertise and speak my language!

[@VeryPersian]

You forgot the orange for the cooling, but great video.

[@jonesacnaples]

You are right, thanks for pointing it out.. just trying to help Thanks for watching

[@deddykosasih387]

na na So how is it supposed to wire up together for cooling? Red, green, yellow, and orange together? Thanks

[@phototec]

Yep, the orange wire needs to be connected for the reversing valve to be energized to put the heat pump in cooling mode, or else it would stay in the default heat mode. David was wrong.

[@caviota2000]

na na o.

[@TheMaximomex]

Great video, I also catch it when you forgot orange but only because you explained everything very well. Thank you.

[@NotOprahButClose]

You're right! It's not complicated! I just needed it explained clearly! Thank you so much - first time home owner, strapped for cash, and now the master of my HVAC system!

[@Lloydski]

I know this vid is old but. For you heat pump people out there the Orange (in almost All 90% of heat pump units) wire HAS to be energized to reverse the valve to Cool. When orange is Not energized it is in standard Heat mode. This is why a regular AC Thermostat does Not work for a heat pump. If you were to connect it to a heat pump it would be in heat cycle all the time do to the lack of the Orange wire connection. When he did not connect the Orange it would have fired up but would have been heating. Good vid just making a point...

[@jonesacnaples]

You’re correct I miss spoke in this video I should’ve went back and changed it

[@JustMe-01]

Im confused. When testing heat and testing AC, your instructions for both was tie red yellow green.

[@AlmarbadiT]

I think he has to say grap the y , g , o and r wires in heating case if you have heat pump. The process is done by control board .

[@JohntechFL]

To get hot and cold you use the same 3 wires?

[@invisio]

And then he goes on to say this stuff is so simple. Yeah you need the reversing valve on to get cooling

[@aaronclark1599]

I wish you lived in Oklahoma I would work for you in a heartbeat

[@timothyfree5257]

David hi tanks for your video. I was wondering if u could help me. I tried to upgrade my thermostat to to smart one and can't remember what G wires to hook up. I shld have took pictures.

[@timothyfree5257]

Would it be possible to take a pic and u tell me what wires to hook up. Please please sir

[@antoniogonzalez5826]

Fix!! My yellow wire was disconnected.💪thanks!!!

[@Smitty3572]

Good video, but you forgot to add the reversible valve for cooling when connect in ng wires to bypass thermostat. Possibly mixed heat pump with straight cooling.

[@daveodden6042]

you spotted that too!

[@bobbyratliff5292]

Hello Mr. Jones..I'm not getting any regular heat...ac and everything else works. Think I need a new thermostat.

[@FixMyHeatHVAC]

It is possible that your thermostat could be at fault. Try removing the wires from the R and W terminals at your thermostat and touching them together. If the furnace starts and runs again, then it is likely your thermostat is no longer sending 24v back from W to the furnace. Replace the thermostat. If the furnace does not start and run, then it is likely that something on the furnace side of the system may be the cause. Check the furnace for a fault code at the circuit board or observe the furnace operations to continue diagnosis.

[@larryjr4282]

Thank u so much it help us out for ur family i subscribe to your page cheers 👌👌

[@bnm76m]

Thank you you saved my butt, Trying to find a HVAC technician on Memorial Day weekend Was impossible or too expensive A little trick to hotwire for cool Save me my family from a hot weekend

[@15NarutoSasuke]

You are a god sent❤️ I understand all of this so much better because of you.

[@02tcgt]

great video. thanks. but we have a problem not mentioned. we set heater to 70 degrees at night but for whatever reasons it goes all the way to 85 degrees (and higher). what do we do? please.

[@odelle3763]

Best vid I have seen. Wish you had mentioned Rheem and Ruud and where to connect reversing valve wire (normally orange) since their reversing valve works backwards from other mfg. In other mfg heat pumps it energizes the reversing valve in the cooling mode but with Rheem and Ruud it energizes the reversing valve in the heating mode.

[@bykrdood8197]

You just said Yellow, green, and red are for heat. Then after you explained emergency heat, you said yellow, green, and red are for cool. Please explain. Thank you.

[@edyebba3414]

He forgot to tie in the orange wire(reversing valve) for cooling. Without the orange wire in the circuit it would just run in 1st stage heat.

[@siiah88]

@@edyebba3414 yes he forgot the Orange for the reversing valve.

[@shanemehalko7100]

Good job thanks love you videos keep them coming

[@curiosity2314]

Good Man, thanks for the video and all the hard work!

[@jonesacnaples]

thanks for watching, please share with your friends. I really appreciate it

[@MrVFrench7]

I had an old Honeywell thermostat; old house, old wiring. Took the old thermostat off to install new RTH7600 Honeywell thermostat. My wiring has only 4 wires; red, green, black and yellow. encapsulated inside a white wire coming out of the wall. The old thermostat was connected to the red and green wires; the black and yellow wires were wrapped around the white wire coming out of the wall. I cant get the heat to come on after reconnecting the red and green wires on the new thermostat. Any ideas?

[@简·爱]

Hi, I have the same question as you. I only have 4 wires as well.

[@alexkulshyn]

Your examples of heat and cool cycles are identical. You need to use orange to differentiate between two of them.

[@steven-sl7jv]

What if you want cool you connect the red the green yellow and compressor don’t start where do you go from their?

[@jonesacnaples]

Make sure you have high voltage at the outdoor unit as long as the indoor unit is blowing air then check your low voltage connections

[@ghost_rider221]

surprised no comments on video being upside down

[@BowmanDarin]

Maybe flip the video right side up?

[@nizarsami2432]

You are very sincere gentleman. You love to help from bottom of your heart All respect to you!!

[@dannydaniel623]

David missed his calling. He should have been a school teacher. Lol excellent video.

[@tyroneshoelace4872]

Your tutorial looked very thorough and I thought I could wire my basic Honeywell thermostat to my Trane heat pump. But no, when I look at the wiring I see it matches to nothing you are explaining in your video! I have a "White" wire not connected. However, there is no "W" terminal except for a "conventional" hook up. For the other terminals there is no "W". Now what?

[@mikef6706]

Do you need the R & C terminal connected for a battery operated thermostat? Thank You

[@jonesacnaples]

no

[@TitaniumKanikas]

Excellent video! Thank you for dumbing it down for idiots like me!

[@josephfiorenzo1268]

am i missing something how can cool and heat be the same three wires?????!

[@lequang2296]

Agreed with you , he has Y,G and R call for Heat cycle Also he has Y,G and R call for Cooling I am confusion same as your question On the heat cycle he is missing O ( reverse valve if heat pump) means Y, G ,R and O

[@dominicparralez8074]

LeQuang On heat mode ,the reversing valve is in fail safe mode, no need to be energized in heat mode, in cooling mode, the reversing valve needs to be energized for cooling.

[@bk6999]

I noticed that to and im really new at this so it was confusing hence why i scrolled down in comments to see if anyone mentioned or noticed it thx

[@ledbetterjack]

B K, I think the 2 replies above are correct. If you have a heat pump, you would need to connect the R to the Y,G, & O. R is 24 volt, Y turns on the compressor, G turns on the inside blower, & O shifts the reversing valve to route Freon to cool the house.

[@cookmaster3626]

Sir great video. I am having an issue with my blower motor inside. It comes on when in Heater mode. When i have the thermostat in cool mode or FAN mode, the blower doesnt turn on. The condensing unit works though. May I know what is the issue? Thanks.

[@yingcai3841]

heating and cooling are the same connection?

[@vm6653]

Excellent work and would say very detailed explanation for DIY home owners. Can see real honesty..... David thanks for saving us from crook technician s

[@DDAUGHTER2626]

My house it really hot I connected the wired like you said and now my thermostat won’t turn back on.

[@MrKidgod345]

Did you find a fix mine is the same

[@DS-fb9te]

I broke my heat pump. 😢. Never had a heat pump and in first winter the outdoor unit was running and running so I turned it to emergency heat and when weather improved no compressor running on heat or cold , had a lock compressor 2000 D to get fixed. I wish I had watched this before. THANKS for sharing your knowledge.

[@jasonhall2753]

Good vid. Just had to stand on my head to read it.😂

[@maashq]

When you gain experience over the years you becomes the godfather in what you doing,this is what the video said beside the wiring. thanks and thumbs up..

[@richartrichard6164]

Beautiful

[@randybrasseau4880]

thank you it help and i fond my problem it was an easy fix you know your shit

[@jonesacnaples]

I am glad it helped thanks for watching

[@Kevin-rz6lm]

David Jones may be a tradesman, but he is being a professional here. Thank you for sharing your knowledge. It really is very simple. I almost hired a service tech for an $85 service call (and that is cheap nationally).

[@mattbundy4900]

David, installed honeywell t5 programmable thermostat. 3 wire boiler system. 2 zones 2 separate thermostats. I have black white and red. I wires as instructed per my old thermostat and my zone valve opens boiler runs and doesn't shut off it exceeds temperature until I manually turn zone valve off. What am I missing it's a brand new honeywell I'm sensing human error in wiring thermostat. Thanks in advance

[@drewsquickfix]

Thanks man good description and examples!!

[@kf4wnf]

Thanks! Great video...upside down, but still great...LOL!

[@joeydennis7148]

Well you didn't finish. Where does the black wire go?

[@jodyhill2322]

Thank you so much for this video!I'm a widowed woman and my digital thermostat went bad and I could not figure out how to get my furnace to blow heat..until I watched your video.Thank you so so much,truly appreciate you makin' this.

[@harison548]

hi Dave. I'm currently an appliance repair tech. I'm thinking about getting a job in HVAC. What do you suggest i learn before I start applying for jobs? vV

[@jonesacnaples]

Duct work That's where most problems start

[@555666jyd]

Yes I have honey well pro 3000 and I would love to install a nest wifi I have 7 wires in the Honey well how do I transfer to the nest wifi thermostat diagram

[@earlwright9715]

My goofy brother changed my moms thermostat, and it no work now! I asked why they didn't call me? I'm no HVAC man ,but I am an electrician. So now I have to figure out what baby brother did.

[@OswaldSoans]

To the point ,sir , fantastic tech service to the core !!!! thanks

[@litopabalan8639]

Thank you for sharing.Great help.God bless you,

[@lovelyskyblue375]

Thank you So much was 102 today and very hot in my home $120.00 for a new Thermostate your video helped me out Thank you for caring to share. Hot California

[@jonesacnaples]

thank you

[@skyh2k]

Thank you so much for making it so clear for us DIY guy.

[@thekristymichelle6537]

Thank you! I’ve been looking for these simple answers for 2 weeks now! So glad someone finally explained how it all works in a way that makes sense to people that are not HVAC trained.

[@Lemontus]

Hi David, thank you for your helpful videos. It makes easier now. Yesterday I got an issue with ceiling (townhouse) heat pump and really stuck - Everything looks well, but outside unit (compressor) doesn't start. Also relay (transformer - aux - limit) is buzzing. Before no buzz, but unit was worked. Customer changed wall thermostat and it stopped. I came, replaced the thermostat for heat pumps, started work. Run 2 days, then stopped again and buzzing noise showed up again. Have you get something like this?

[@jerrymontalbano3222]

It would have been nice to include short testing in the video. For example to test the compressor, connect power (red) with a specific color (ex. yellow) or for fan (G) and red. etc. I'm not that savvy, but this would help to identify what's happening with any breakdown or not.

[@PrettyLittlePoison]

THANK YOU THANK YOU THANK YOU!!!!!!👏🏼👏🏼👏🏼👏🏼👏🏼👏🏼I told my S.O. That something was wired wrong and that I would fix it. Sometimes the gals at the only ones who can fix things! 😜😂

[@cynthiasandor2928]

I only have a white and red wire - hooked up thermostat and my furnace did not come on. I removed the new thermostat and replaced it with the old HoneywellTH3110D1008 W - white wire R - red wire and the furnace does not come on. Any suggestions? I am at a loss here. Thank you so much!

[@luismiguelramirez2489]

Great video I’m a new member In my situation I have a black wire tha you don’t have that goes to C terminal, what’s that one for?

[@GhostCreeper]

how you post a video and its upside down..come on man sheesh

[@Fhvac]

Buenas tardes saludos instale un sistema heat pump pero solo enciende el air acondicionado y el heat no enciende

[@neogator26]

Couldn't figure out what my S wires are for but you did help troubleshoot my heat pump issue! lol Thanks for the video!

[@gtaratuta]

my thermostat only uses 2 wires red attached to R and White attached to W1 and W2 on the furnace control board however I would like to hook up my new WiFi thermostat but I need a common I am told, would that be the B connector on the board? its a White-Rodgers model 50A51-405

[@RandyWells24]

what is RH? i have RH and RCorange wire is on RH and red on RC, trying to upgrade this dino, most likely from 1986?

[@jessemills4956]

I just tried all these steps and none of them worked, unfortunately. However, I still got flame in the furnace, and the fan (indoor blower-motor) does come ON, when I set it to ON position at the furnace, but nothing else. Any other suggestions? I'm thinking it's likely a tripped wire and/or a blown fuse (transformer). SUPER helpful video though.

[@stephenlester4072]

Can you help me? I'm upgrading my trane thermostat that has X2 white and W1 black wires for Er heat but my new honeywell 9585 don't have those labeled. I tried Y2 and W2 AUX/E but im getting normal at startup but Aux heat kicks in bout 15-30 sec later. Any ideas if i have those Er heat wires correct on the the new honeywell?

[@Litt1leMe]

Thank you so very much for the information. It has definitely come in handy could you please tell me what the (color) industry standard is stage 2 cooling my stage 2 isn't turning on.

[@kamalnasari8632]

I wished I could find information about thermostat & I just got it . I shoud have wished to win friday ticket 😂 . I got it on time . 😇❤👀✌🙏🙌👍 wish U a happy Xmas .Thank U GOD SPEED . 󾓦✟✡✡ 󾓦 🇺 🇸 🇦 ❤❤❤❤❤❤ How can I sent U the picture of a control board of kenmore ac , so U might solve our problem . I thank you .

[@networth8754]

My existing system is Gas Furnace and single AC unit. My existing thermostat has C,G,W,Y and R (no jumper). The new Thermostat has the choice of RC or RH with a jumper. (no R). Question: Which terminal do I place the existing "R" wire to? RC or RH? Do I leave the jumper in or remove?

[@enigma242333]

David. Very thorough info. Thank you. But I have a question for you. I disconnected the "W2 White Wire" to Auxiliary at the thermostat because it turns on with only two degrees more in setting. When I turned power back on AUX on thermostat showed running on the display. What's going on? Please email me on this.

[@meansmurf1]

all the thermostats are the same but when he neglects to tell you is that the White-Rodgers thermostat.. has a 6 wire setup you have a brown wire that runs directly to the e connector for emergency heat. connector E... and you will not find that connection in most modern day thermostats. the other thermostats aren't set up like, so it's very confusing the White-Rodgers is a classic 80 series model. and that's completely different from all the other thermostats.

[@solebrth]

Made the mistake of connecting the common wire to the B terminal thinking it meant blue for B , but instead it meant black for ground ?

[@SreenivasPondicherry]

He does a good job of explaining the details that many other videos did not share. It is easy to troubleshoot.

[@sjjubb1989]

Great video! None of Honeywell's documentation explained what letters are what on the back of their thermostat. This video helped me out greatly, thank you.

[@harrelsontrumpets]

This video did not help with my situation. I do not have 7 or 8 wires. Like most homes, we only have 4. The issue is that heat will not come on when wired to run AC. And AC will not come on when wired to run heat. There are several factors you skipped over that could help most of us solve our problems.

[@usamaafana8671]

David, I have a Trane T-stat Model # BAYSENS019B that has numbers not letters. #7 White (Heat), #8 Blue (Cool), #9 Green (System On/Off), #10 (not Used), #11 Black Common, #12 Brown (Communication) & #14 Red (Power). not sure what I can replace it with, I tried two different T-stats but none worked. can you explain this mess for me, what T-stat can I replace the old non functioning one with? does it has to be Trane? can it be wifi? you can use my email for reply. Thanks

[@johncline5502]

Thanks for the video it helped me with my problem 👍🏼👍🏼👍🏼