Coleman Mach RV air conditioner walk through and **BONUS** maintenance

[@LymanTaiste]

Do you have any idea how many videos I sat through until I found this one. I like it when someone just provides instruction. I don't care where they bought the tape,drill bits, soda, or other crap. Thank you sir!

[@MRRVTECH]

@@LymanTaiste thank you for watching!

[@ChrisHadlockTV]

Mine keeps tripping the 5kw generator breaker, 20amp. Sometimes after a couple minutes, other times after an hour. New capacitors & fan motor. What would you check next?

[@MRRVTECH]

@@ChrisHadlockTV Compressor amperage, the RLA ( running load amperage) is listed on the data tag.

[@css52664]

This is great that you named every part, very helpful to alot of people.

[@theflynlion]

Excellent video, just what the doctor ordered! Straight and to the point without all the fluff I see in some other videos. New subscriber here.

[@MRRVTECH]

Thanks for watching!

[@johnnylightning1491]

Thanks for the lesson. I've got a 6 year old RV I bought used. I have no idea what maintenance was done on it so I need to get on the roof and do what you just did. Keep the good stuff coming.

[@johnm1898]

Great video. Thanks for posting.

[@Bantie1]

OMG! My really old 2006 Fema Trailer rooftop ac was making a racket and shaking after a coupla months of ownership. Yes, I bought a repo'd Fema! Anyway, I quit useing the ac when it acted up. Turned it on and quickly off for an electrician that came for a different problem, he say's "I know what your problem is and it'll cost you since I have to go up top. I just let it go and got a window unit since I live yr round in it. After watching your video I went on top and found the problem. Dirt dobbers nest on the fan!! Easy fix!! Thank You for this video!!!

[@MRRVTECH]

You're welcome, thanks for watching.

[@s.mendez7160]

Wow, super helpful video! Thank you for taking the time to make this, and help educate others.

[@kentolsdorf54]

Ty u very much great video and illustrations. My holes were plugged and dried water at the tray was full

[@FloridaCracker2017]

Great video, very well explained. Thank very much sir!

[@virgilsmith5792]

you taught me a few things..thanks..liked and subscribed

[@KTFG]

Edit: disregard, I just noticed the note at top left indicating dashed lines are optional. Great video. One question though, why only two capacitors when the schematic also shows a start capacitor? I have the same unit and today on a bright hot sunny day I disassembled it to troubleshoot and clean, when a torrential lighting storm hit suddenly out of nowhere. I buttoned it up quick as possible trying not to get hit by lighting and assumed I just didn’t see the start capacitor. I like that battery powered blower. We used heavy metal Cadillac blowers to blow out elevator generators and motors for decades until Makita came out with smaller, lighter plastic blowers but still plug in (fine for us, we have outlets nearby) but a battery unit would be nice.

[@winnerscreed6767]

This is a good video, I've already learned how to clean the a/c, now my issue is the motor sounds like it still spinning/running for a few seconds after i turn the a/c off. It would be so very helpful.if you would make a video on how in the world you properly take out and and install a new motor. I have tired oiling the bearings but since the are not really serviceable I'm pretty sure I'm going to need to replace the whole motor. No decent videos are available for this. Thank you.

[@brianjones2303]

Thanks for the info. I have recently had mine replaced but the new will not keep blowing cold air, as the day gets hotter the air the ac is blowing also gets hotter. I'm going to try the tape trick. I hope it works.

[@MrDavehb47]

I have a 2000 mini Winnie Winnebago with an air conditioning on top only has 30,000 miles on it anyway I’m having problems with my fans starting and I changed all three capacitors. I know the starter capacitor for the fan has the brown wires in. it’s kind of the oblong shape Capacitor changed all three and I switch on the switch to check it. The fan still won’t start if it’s turned on and then I touch the fan and start turning it with my hand. It will go and it will work and work on high and low and everything works, except for the fan starting up and I know the capacitor that I put on the new capacitor I put on there works and I checked the white wires to go to the fan and it doesn’t seem like there’s any short those wires is there anything I might be missing, keep that fan from starting because the fan works. It works on high and low. It just won’t start unless started with my hand please I’ve been dealing with this for limited time over four years because RVs in Colorado and I live in California so I have a little time to work on it, but it’s really frustrating. Please help.

[@MRRVTECH]

@@MrDavehb47 capacitor the same uF? If so and tests good, then I would suspect bad bearings.

[@MrDavehb47]

@@MRRVTECH even if the fan runs after I started with my hand and it doesn’t make any bearing noise and it changes speeds from high to low and low to high

[@MRRVTECH]

@MrDavehb47 yes because the capacitor can't produce enough electrical torque to get it going froma static state. However, I would first be suspect of maybe getting a new/bad capacitor this must be verified first.

[@MrDavehb47]

@@MRRVTECH ok thank you I’ll test those capacitors, especially the one with the two brown wires for the fan starter The RV only has 39,000 miles on it. You know how they are. They don’t they don’t get used that much plus I would think if the fan had bad bearings I would be able to hear it or feel it. I get these capacitors off Amazon I really need to test them like you did.

[@jaysmith9062]

Great video. Thank you for the information.

[@kristencrivello6538]

Great video your so thorough I'm a girl who bought her 1st toy hauler and prob last and ac prob...and it's 120 degrees....uugghh

[@HighCountryRambler]

love my toy hauler. Can you pick up a portable swamp cooler or air conditioner as a bandied? Window AC.

[@christhompson1114]

I have a Coleman Mach 3 and it’s +25 yrs old. It runs and blows cold for about 10 minutes then it overloads the 30amp breaker or the generator. Any suggestions or if this maintenance process might fix the issue?

[@dennisbachman4316]

Great video. I learned a lot. I was just up there today but it was too hot to take it all apart. I have a very similiar Mach Q. 48204-0660. My question is if there is a modification that can be done to more effectively move the air into the ductwork for more flow. It seems to take my a/c forever to cool the rv down. I’ve added a Coleman soft start to the a/c for efficiency, but am very disappointed with the airflow. I have a Cougar 27sgs. Thanks for your instruction!

[@MRRVTECH]

@dennisbachman4316 There is a product that claims to increase air flow by 40% its a styrofoam block with ducts that force the air into your ductwork directly so there is no wasted CFM. I have installed a few but I think "40%" is a little unrealistic. It does work though.

[@dennisbachman4316]

@@MRRVTECHI looked into those. $170…Wow. My plenum is very shallow so not sure I’d gain a whole bunch from that. Thanks for the info

[@janetdepue9826]

Do you know where I can purchase the foam piece that's on top of evaporator coil . What happens if it isn't there?

[@carloscaro2699]

Thanks for this..subscribed! btw, what made this unit fail that it was no longer fixable? Bad compressor?

[@MRRVTECH]

Refrigerant leaked out

[@jasonator13]

On my Coleman, one of the four screws holding down the cover is spinning freely in the hole and won't come out to release the cover. Have you had that happen before? Any thoughts on a solution? I'm guessing the threaded insert in the metal housing of the AC itself may have come loose and is just spinning along with the screw.

[@MRRVTECH]

@@jasonator13 yep many times, cut it off with a grinder. 5here are thousands out there with 3 screws

[@charann2005]

A very good video. I am happy I found you. I have a question. My 2003 Prowler has a Coleman AC with a thermostat on the wall. Lately when I turn it on to cool it delays several minutes before it turns on even when I have it set very low. Or it turns on then off. What are your thoughts?

[@MRRVTECH]

These units have time delay relays in them, they delay the time before the compressor starts to ensure the " head pressure" has dissipated, this prevents amperage spikes at start up that can trip breakers. That being said, after the time delay relay closes ( usually about 2 min 15 seconds) the compressor should start and run normally and not shut right back off. Now if you are in auto mode and have cycled through multiple settings on your thermostat this can occur as the control logic searches for the desired / correct fan speed but if that is not the case...you may need a service tech.

[@s.mendez7160]

Hello Josh, what brand of coil cleaner is that in the video? Thank you.

[@charann2005]

Thank you

[@MRRVTECH]

Thanks for watching!

[@nealasilver2069]

Like the video and I did subscribe. What would cause a similar unit to not cool very much? I do heat compressor kick on. 2021 Rockwood mini-lite 2516s model.

[@MRRVTECH]

Low or no refrigerant.

[@Nateorious]

This was a great video, thanks for walking us through the process. Question for you; My travel trailer has this exact unit and after it had sat for a while, I tried to turn on the A/C to test it and it just hummed. I quickly shut it off and then hopped up on the roof to check things out, and noticed that the blower fan wasn’t spinning very well. I shot some WD-40 into the bearings and spun it manually to work it in and that seemed to do the trick, but the unit now runs noisier than it did before. Is there anything I can do to disassemble the fan blade/shaft from the motor to better lubricate it?

[@MRRVTECH]

No, it sounds like the bearings have dried up and rusted, best to just replace the motor.

[@enriqueanaya1779]

Hello. I have this same unit and it keeps on freezing up onnme after I run in on high for a few hours. I've cleaned it like you demonstrated on this video as well as the filters on the inside of the rv but it still freezes. How can I fix that? It happens to be the unit on the bedroom side of the rv and it gets hot inside quickly when it locks up. Any help would be much appreciated. Thank you.

[@enriqueanaya1779]

Also, when it freezes and defrosts it shoots all that ice down then ducting. The drain gaskets are not clogged either. If that helps.

[@trevettwilliams6615]

Where is the water going to drain. Mine is draining into my ceiling. I have a Coleman Mach 3. I live in Las Vegas and obviously it gets HOT in the summer so the unit is running hard. Is there a trick on running a drain tube or something to avoid water damage in ceiling?

[@MRRVTECH]

The condensate runs into a tray under your evaporator coil, the tray has small drains on each side that drip onto the roof. These drains often get clogged with algae or debris allowing the tray to fill up and overflow. Check your drains are clear. Also, it may be time for a new gasket and annual maintenance.

[@HighCountryRambler]

Pretty sure I have mud-dobers on my fan blade as it's working but making a rubbing noise. As soon as the temp drops under 100* inside my storage building I'll go pop the cover. Thanks for the BS free video.

[@katherine3432]

hi Josh - from inside my trailer - i open to clean and there’s a styrofoam plate that moves around- i’ve been told this piece is the reason my coleman mock AC is freezing up and dripping inside, i moved it and now it smells like my AC is going out- which way should that plate face? TIA and thanks for all the great info

[@MRRVTECH]

That sounds like your air dam that separates intake and discharge air. If the cold discharge air gets sucked into the intake the evaporator coil will freeze up. The air dam needs to be stood straight up and down between the two openings in the bottom of the air conditioner and then taped all the way around to prevent air mixing.

[@rogerdennison8154]

Nice to see a video where a professional knows their trade as opposed to weeding thru vid after vid of people “figuring it out” as they go. 🙄 Question about the drain: I’ve sucked out the drain tube that comes out by the wheel well with a shop vac and that seemed to fix the leaking Dometic- for now…but if it happens again, am I looking at taking apart the “box”, to access the drain pan? ( Other than pulling off cover, which I have done a number of times)

[@MRRVTECH]

Yes, remove the cover and open the evaporator enclosure, you will see a tray under the coil.....I have a McDonald's milkshake straw attached to my shop vac to reach the tray and suck all the algae off the tray and out of the drain cups to clear them.

[@rogerdennison8154]

@@MRRVTECH Ty!

[@DaddyHawksToyBox]

I have this AC unit on a 2022 Sporttrek, and the styrofoam block in the center between the fan and Evap coil has mold growing on it. How do you remove that to clean it?

[@MRRVTECH]

Nylon brush then a rag...no water/ chemical

[@frankalberto]

Thanks

[@MRRVTECH]

You're welcome

[@mikefostercpa]

Can you tell me the easiest way to change out the compressor fan blade? Do I need to take the whole motor off? It doesn’t look like enough room to pull the fan off without it hitting the coils. Blades broke off and mobile rv guy installed a dometic blade as a temporary fix, but it “clicks” (hitting something) so I want to replace with the right blade from Coleman.

[@MRRVTECH]

The condenser fan blade can be swapped by removing the Phillips screws at the base of the condenser housing, this will allow you to m9ve it slightly backward to swap the blade. If you have an older model it may also have 2 phillips screws on the top brace attaching the condenser and evaporator housings together.

[@mikefostercpa]

@@MRRVTECH cool - I’ll give it a shot when my new fan blade comes in next week. I’ll let you know how it goes.

[@mikemcdermott197]

I have a 2003 coleman mach 3 that appears to run fine except blower fan wont spin unless i take inside cover off & give it a gentle nudge.also seems to spin freely.capacitor?

[@MRRVTECH]

Yep fan capacitor

[@lilmountainlady]

I have a 2019 Grand Design Travel Trailer with this brand AC. I just tried to unscrew the 4 screws on the top of the shroud. Three screws came out easily, but the last one, even adding WD 40 will not even budge. I would like to do maintenance on it, although it is working. Any suggestions as to how to remove this 1 screw? Thank you so very much.

[@johnnyg8391]

I actually have the same problem today and I ended up cutting the bolt off to get the cover off. All I did was spin. Now I’m looking at removing the evaporator coil shroud and trying to replace that one bolt that just kept spinning. this is not for you but the gentleman who posted the video what are my options and replacing that I’m also getting a minor spinning noise I’m wondering if I can spray some WD-40 and eliminated thoughts?

[@stevensettlemire5387]

Hi l have a 2002 Fleetwood southwind with a coleman mach ac.i replace the blower motor.the blower motor runs backswards.l have checked my wiring it's all good.l suspect bad motor from factory.whars your thoughts?

[@MRRVTECH]

How is it running backwards? Which way is the air flowing?

[@JohnNguyen-iw8qn]

If your shop is charging 12k for a roof job for 2k (at most) in materials. Talk about a scam artist.

[@MRRVTECH]

You're an idiot

[@JohnNguyen-iw8qn]

So you're not disputing that you are a scam artist! Very nice. Mroverchargescammer should be your business name. Just an FYI to any potential customer. A basic fifth wheel or travel trailer roof should not cost 12k, at most 10k for the most extreme wood damage. Do your research and take your business elsewhere. ​@MRRVTECH