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06-13-2020, 07:56 PM
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#1
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Montana Master
Join Date: Apr 2006
Location: Mesa az
Posts: 2,945
M.O.C. #5651
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Need help with A/C quick
This afternoon here in AZ my A/C shuts off like it was cooled down. Even tho it wasn't. I can shut it off, wait 30 seconds and turn it on again. It works for a while - earlier I think it ran maybe an hour or so. Now it is only running 5 minutes.
Is there some sort of fuse that would do this?
Thanks.
__________________
Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
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06-13-2020, 08:37 PM
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#2
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Montana Master
Join Date: Jun 2017
Location: POINTBLANK
Posts: 1,887
M.O.C. #19944
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Sounds like it lost Freon. Call a tech
__________________
 RAM 22' DRW 3500 Crew LB 40 gal reserve tank / RETRAX Bed Cover / 2020 373RD HC / IS / MOPEKA Tank Monitor / Furrion Side&Rear Cameras
Slide Toppers / EMS-HW50C / Sailun 85's
3rd AC / Dometic 320
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06-13-2020, 08:38 PM
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#3
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Montana Master
Join Date: Jun 2017
Location: POINTBLANK
Posts: 1,887
M.O.C. #19944
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Presume it had been doing fine. What model? Doesn’t show on phone.
__________________
RAM 22' DRW 3500 Crew LB 40 gal reserve tank / RETRAX Bed Cover / 2020 373RD HC / IS / MOPEKA Tank Monitor / Furrion Side&Rear Cameras
Slide Toppers / EMS-HW50C / Sailun 85's
3rd AC / Dometic 320
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06-13-2020, 08:51 PM
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#4
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Montana Master
Join Date: Apr 2006
Location: Mesa az
Posts: 2,945
M.O.C. #5651
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It is new last August 1 - Dometic. I thought I read somewhere that they do not replace freon in RV A/C units. I certainly hope that is not it. I am 4 days into an 80 day trip. I know it has a 1 or 2 year warranty, but it will delay us and be a general pain.
__________________
Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
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06-13-2020, 09:06 PM
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#5
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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Try running the fan on high on that unit. It could be freezing up. One of ours does that in NM with temps in the 100's and very low humidity you wouldn't expect that, but the unit running for hours at lower speeds without shutting off does it to us. After noon I shift our livingroom one to high and turn it back to auto at night. The bedroom one shuts off enough it doesn't have the same issue.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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06-13-2020, 11:37 PM
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#6
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Montana Master
Join Date: Apr 2006
Location: Mesa az
Posts: 2,945
M.O.C. #5651
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I pretty much run on high all the time. It did seem to correspond to when the temps started cooling a little - maybe only 80 instead of 93, tho that doesn't seem like it would cause this.
__________________
Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
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06-14-2020, 05:34 AM
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#7
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Seasoned Camper
Join Date: Apr 2017
Location: Jerome
Posts: 97
M.O.C. #19743
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I can confirm they don’t recharge RV ACs. If a tech tried to it’s not supported by the manufacturer
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06-14-2020, 06:02 AM
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#8
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Montana Master
Join Date: Oct 2019
Location: Jacksonville
Posts: 2,137
M.O.C. #25165
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Tom, I think this sounds like the same issue we are having. I removed the face plates from both thermostats and that reset and worked for a while. Now it's doing the same thing again. Try removing the face plates, they just pull straight off. You can still adjust using the metal blade underneath. Turn unit off for about 3 minutes, then turn back on. It may take several times to reset. See our running thread at https://www.montanaowners.com/forums...ad.php?t=81164. We've been going back and forth with Dometic for a couple weeks.
__________________
Robert & Diana McNeal
2019 Montana Legacy 3791RD 20th Anniversary Edition
2014 F350 4x4 6.7L SRW
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06-14-2020, 08:24 AM
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#9
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Montana Master
Join Date: Apr 2006
Location: Mesa az
Posts: 2,945
M.O.C. #5651
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My trailer is a 2013 and only has one A/C unit on the thermostat. Most of the threads are about the newer touch thermostats
__________________
Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
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07-01-2020, 02:16 PM
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#10
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Montana Fan
Join Date: Mar 2017
Location: Bakersfield
Posts: 110
M.O.C. #19549
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If it is domestic, the can walk you thru a process to reset the thermostats.
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07-01-2020, 07:49 PM
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#11
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Established Member
Join Date: Jan 2016
Location: Jacksonville
Posts: 17
M.O.C. #18178
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Reset thermosat
Find your owner manuel for the thermosat. It will tell you how to reset it and solve you problem.
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