Coleman Mach Air Conditioner Not Cooling? Try THIS First.

RV Repair tech walks you through how to test the compressor on your RV AC.
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Links Mentioned in the Video
RV Compressor Tool: www.rvrepairwoman.com/compressor
RV AC Guides: www.rvrepairwoman.com/acguides
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Timestamps:
0:00 Intro
1:22 Prep
2:55 Go On Roof
6:22 Heat Overload
7:48 Set Up Meter for Safety Test
9:55 Safety Test
12:10 Set Up Meter for Compressor Test
14:59 Fighting With Meter
15:27 Compressor Test
16:41 Math
18:54 Compressor Bad?
20:12 Compressor Good?
22:56 1%
26:29 Outro
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RV, Camper, Fifth-Wheel, Motorhome, Fleetwood Flair, RV Maintenance 101, Mobile RV Tech, Las Vegas, Henderson, Summerlin, Nevada, RV Repair Technician, Save money, Save time, Certified RV Repair Tech, RV Tips and Tricks, NRVTA, National RV Training Academy, Water Heater, Dometic, Atwood, RV Inspector, RV Inspection, Coleman Mach, AC, Air Conditioner

[@darrenscully7850]

This video, solved my issue. It was not my compressor. Endedup being my controller. You..... saved me from buying a new unit. Thank you!

[@rvrepairwoman]

Yay! Love to hear it!

[@AlexanderMorseDesigner]

@darrenscully7850 What vintage and model Coleman do you have? I just did RVRepairWoman's wonderful compressor test and ours passed the test. I'm lost.

[@johnmacias971]

This video made it so easy to figure out I had a bad compressor with bad resistance readings across all three terminals. Thank you RVRW 😊

[@TheSupra24ssv]

Great job!! One of the best DIY type videos I have watched

[@ocaguilar1]

I do the majority of my RV repairs. I needed this video. I will be testing my unit as my ac runs and I can hear the compressor come on but it doesn't cool. Thank you for explaining the test process. I suspected a freon leak but I don't see any black oily substance around anywhere. Again, thank you.

[@aa2ronsiegel]

Thank you Emily! I've watched this and your video about the water heater. Both are very amazing and you're brilliant!!! Ty

[@sandiebock8035]

TERRIFIC, WELL DONE, as a woman this makes sense when looking at what some guys are teaching and cannot relate to I totally understand. THANKS!!

[@rvrepairwoman]

You got this!!!

[@LorriTaylor-xk6cz]

Thank you!!! I've had male RV Techs talk down to me - I so appreciate you!

[@rvrepairwoman]

Happy to help!

[@Imagashole]

Great work!

[@moandjoaz]

Great video!

[@jamisonroe472]

Excellent video. Concise and easy to follow. I subscribed. Vegas local too!

[@daviscrt]

That was awesome. Thanks Don

[@rvrepairwoman]

Glad you enjoyed it!

[@billagreste8812]

Sorry the phone closed on me so I noticed on this unit if I turn off the AC and wait 10 or 15 seconds turn it back on, it cools properly with a 15 to 20° difference. When I did this I went back up top and did the measurement and the black wire was reading a little less than double the other two wires so now the compressor is not bad. It seems to blow hot air more frequently when it's hot outside than when it's cold right now I'm sitting in a chili nicely cool motorhome after the sun has gone down and the AC has been putting out great cold air but sometime tomorrow it'll switch back to not cooling. I don't think my compressor is bad or it's bad in that sometimes it totally works and sometimes it doesn't. What could it be I'm at a loss for my next step and the different technicians honestly don't know what they're doing. Your videos are more informative that they could ever hope to be.

[@markhouse9570]

Nicely done! It was great to see the test of the compressor motor. Quick test to see if it's time to bite the bullet and replace the unit. I'd like to carry a troubleshooting PDF for my Mach 15000btu heat pump in my rig to refer to WHEN there's an issue.

[@raymondgross6419]

Thank you

[@astroverland2367]

I am 100% looking forward to your Dometic guides!

[@rvrepairwoman]

They are in the works!

[@michaeldonker4656]

Thank u so much for all your test tips I have a Coleman Mac air conditioner cools on high, but not on low it just hums any advice thanks

[@billagreste8812]

You are a very bright young lady. I employed text in a different field and you've got all the gears in place! I've got a Coleman mock air conditioner that sometimes blows ambient temperature air. If I go upstairs and do the test that you did I noticed my black wire is running less than half of the combination of my other two wires on the compressor which means bad per your troubleshooting.

[@user-qx4ut8xu5e]

Hey, my GE is blowing cool air but not cold like it new 3 years ago. Any thoughts on what I should check? Really liking your videos too.

[@TaterGrabbinBass]

This is a great video, I did everything stated in the video and have found out my compressor is done for. How much would it cost to replace an AC unit on. Winnebago Revel? I live in Phoenix AZ and I guess I need to find someone who can replace the AC unit now. 😔

[@NickB00193]

Great video! Does the AC guide pdf you have contain the way to check for a refrigerant leak with the multimeter and anything about checking relays? Those r the last things I haven’t checked to understand if our Coleman Mach is part of the “1%” 😢. Keep up the great content!

[@rvrepairwoman]

Yes it does!

[@FanceeName]

Do you have a PDF or a video explaining why I can hear my compressor shut off and then I get warm air and then I will get cool air for about 10 minutes and then I’ll get warm air for about 15-20 minutes and then cool air for about 10 minutes and on and on and on. It’s 93° outside and 85 to 89° inside. I have a Coleman Mach. 30 amp trailer.

[@myrvguy]

I tried that test today, but the compressor was leaking so bad i couldn't get a read. It was a mess. I have to put a new one in.

[@Chris-nt3dv]

What would cause it to short cycle but the fan stays running even on auto

[@sandiebock8035]

I saw you went to NRVTA for schooling. Did you feel hard, what were into before you were an RV tech?

[@bobmakowski7627]

Will a bad freeze sensor keep the compressor from turning on. Ifvso what multimeter test is there to check the freeze sensor?

[@rvrepairwoman]

Unplug the freeze sense and short the two pins on the control board that you just unplugged from with some needle nose pliers. I’d the AC starts working, then the freeze sense was bad.

[@steveem7032]

Would the compressor test be the same for a Coleman 9000? Mine is blowing air only.

[@rvrepairwoman]

Yup! Same test no matter the brand of AC.

[@RandallW20]

The links for the AC guides are not on the webpage. Or are they still being built. I understood that one or two were ready.

[@rvrepairwoman]

All the Guides can be found here: www.rvrepairwoman.com/acguides The one for if your Coleman Mach isn't cooling is this one: www.rvrepairwoman.com/ac-guides/p/ac-not-cooling-guide-coleman-mach And if your Coleman Mach isn't turning on is this one: www.rvrepairwoman.com/ac-guides/p/coleman-mach-ac-not-turning-on Dometic guides are still in the works! YOU GOT THIS!

[@wlc1980]

My ohm meter won’t stop, it keeps flashing different numbers. The compressor is coming on, it’s very hot and not cooling. Any advice anybody? Damn year old Coleman Mach hardly used. Bedroom unit cools great.

[@casperhudson7728]

Got a question. Replacing a domestic ac to a Coleman Mach ac. Do I reuse the controller box from the old domestic unit for the Coleman? Dometic ac had 110 plug to clip in a d Coleman dosent. I’m so lost. Have a video that shows how to convert dometic to Coleman. Also there’s no ceiling shroud inside the camper

[@rvrepairwoman]

Should be super easy! You’ll just need an adapter to connect the nine pin Coleman connector to the 6 pin connector on the Dometic control box. Easy product to get your hands on.

[@casperhudson7728]

@@rvrepairwoman r u sure cause the the old domestic didn’t come with a plug. It was all hard wired in. My controller box is a lot bigger then the one I see online too

[@casperhudson7728]

@@rvrepairwoman dometic model # f48ag86a61 “genteq”

[@emiliameza8814]

Good morning Emily. We just hit a 2003 Fleetwood pioneer rv and we can’t get the fridge, and the AC TURNS ON BLOWS FRESH for like 30 seconds then blows HOT 😭😭

[@emiliameza8814]

We just GOT

[@brianwhippen7497]

I just replaced the unit and the compressor still not running

[@glprewitt3245]

Our a c is throwing the breaker still cooling when we flip it back on only flipped breaker twice in two weeks or trail runner r v is only three years old

[@rvrepairwoman]

Is it only tripping the breaker on start up? Or randomly while it’s running?

[@glprewitt3245]

@@rvrepairwoman random while running it has only done it twice and we've been using every day for about 10 days now it's cooling just fine it just makes me nervous that breaker tripping

[@infinityvideoprod]

What do you do if the freon has leaked out?

[@rvrepairwoman]

You’re unfortunately looking at getting a new AC.

[@infinityvideoprod]

Crap, it's just out of warranty too. I assume it's the freon as it smelled musty then stopped blowing cold. Thanks for the help!

[@46fd04]

Let me give you an easier test. Look up and see if you forgot to remove the winter cover! My AC stopped working this past weekend (my first trip of the season). Took the cover off and the AC came back to life.

[@rvrepairwoman]

😂that’ll do it!

[@bobmakowski7627]

😅

[@nathan4658]

😁 'promo sm'

[@user-ql2bz8on7m]

Everything was great, but only one problem would you say that a male tech will come and talk down to you? That’s not nice why would you say that?

[@rvrepairwoman]

😅because I have women who call me every week telling me how some male tech was super condescending to them and hoping I’ll be different. I’m not saying it WILL happen. I’m saying it DOES happen. And one way to avoid it? Learning how to test your AC yourself.

[@robertbrown9147]

This would’ve been a lot better video if you just went and talk so damn much and just get to the point!

[@rvrepairwoman]

This would have been a better comment if I could understand what you were saying ❤️

[@ThomasThaItalian]

Most of the time it can be your start capacitor and run capacitors that go bad its a common issue. They are $13 for each one the start capacitor is back and the run capacitor is silver