sumerduck8
Virginia
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Joined: 01/12/2005
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I am having a problem with my front AC. It is a Duo-Therm by Dometic. The AC unit will turn on, then turn off. Also the unit will run and you can hear the compressor turn on and off. I have taken the cover off the thermostat and cleaned. Any ideas or suggestions would be appreciated. Thanks in advance for your help. Your friend Houston
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traveln_circus
Wa.state
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Joined: 07/08/2008
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Is the fan turning ? Mine did the same thing and the fan motor was froze up.
2004 cardinal 33 LX 2000 Ford F350 crew cab PSD.
Smith & Wesson M&P .40 and a Rottweiler.
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sumerduck8
Virginia
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traveln circus. Yes the fan is running, but you can hear the compressor going on and off. Also the unit will start to run, but turn itself off and on every couple of seconds. Thanks for responding. Your friend Houston
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traveln_circus
Wa.state
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Is it a vented system?
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JFG
TN
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Joined: 07/01/2007
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If you have adequate voltage and amps available, you probably have a bad run or start capacitor.
Fred
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nosaint3
Sioux Falls,SD
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Joined: 02/06/2005
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Believe it or not, when my A/C did that it turned out to be the batteries having low voltage and affecting the control unit. Got new batteries and it solved the problem. Worth a check.
nosaint3
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Roadpilot
Lakes Region of New Hampshire
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Joined: 09/16/2006
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We just had the same problem. We also have an energy monitoring system that indicated the AC unit was drawing >50 amps during the period it was trying to start. Called a mobile RV repair tech for our Dometic. He replaced the start capacitor and ptc for $95 and we were good to go.
2007 Newmar Essex 45'
2006 Honda CR-V and 2005 Chevy Silverado 1500
2004 HD Electra Glide Ultra Classic
2006 HD Heritage Softail Classic
Overbilt Lift
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sumerduck8
Virginia
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Thanks for all the suggestions!!!!! You'll are great. Will try everything that you'll recommend. Your friend Houston
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FISHBUM
Arkansas
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Joined: 03/27/2007
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Had similar problem with mine last weekend. unit hummed but no fan .
climed up and removed the cover to discover the condencing fan motor was froze up. turned it untill it was free and whew we had cold air.
guess i need to replace motor.
Jerry & Marilyn
04 Cougar 285 EFS
06 F-250 Power Stroke Turbo Diesel
Having Fun!!!!
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sumerduck8
Virginia
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JFG...Good suggestion, but was not the problem.
nosaint3...Batteries were OK.
RoadPilot...Was not the start capacitor
FISHBUM....Was not frozen..How's the fishing?
I think I have fixed the problem, going thru all you'll suggestions. I went up on the roof and took the cover off. I had a big dirt doper nest on the coils. I clean it off. Then I check the filters, front and rear. They needed to be cleaned. Right now both ACs are working great. Keep my finger cross. I really think it was the dirt dopers. Everyone have a great day and thanks. Your friend Houston
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