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Topic: Dometic Duo Therm A/C Problem (Read 370 times) previous topic - next topic

Dometic Duo Therm A/C Problem

Turned on the A/C's in our 97 U295 with the Dometic Duo Therm A/C units, and the rear A/C will turn on for a sec or two and then shut down.  Does this over and over.  Front A/C is running fine.  I turned the thermostat down and it does the same thing.  Any ideas?
Bruce & Jen Evans
Montgomery, TX
1997 U295 36'

Re: Dometic Duo Therm A/C Problem

Reply #1 –
Run capacitor or low pressure cutoff would be suspect.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Dometic Duo Therm A/C Problem

Reply #2 –
Quote from: craneman –
Run capacitor or low pressure cutoff would be suspect.
I agree.

Over the past few years I have had to replace the capacitors in both of my AC's.  When replacing the capacitors, I replace both the run and start capacitors at the same time.  It is not a big job.   

Richard
Jan & Richard Witt
1999 U-320  36ft WTFE
Build Number: 5478 Motorcade: 16599
2011 Jeep Wrangler Unlimited w/Air Force One
Jan: NO5U, Richard:KA5RIW
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Re: Dometic Duo Therm A/C Problem

Reply #3 –
It started working again.  But, I'm wondering if I should have a couple of extra capacitors handy, just in case this happens while traveling. 
Bruce & Jen Evans
Montgomery, TX
1997 U295 36'

Re: Dometic Duo Therm A/C Problem

Reply #4 –
That eliminated the low pressure possibility.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean