Question about Dometic Rooftop RV Air Conditioner

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Roof Top A/C problem

Last year I had a problem with my front a/c unit's compressor not shutting off. Even after I turned the switch to off, I heard a humming from the unit and ended up throwing the feeder breaker to shut it down. Never did figure out what happened. Got it home to check it out and the unit worked properly for the rest of the season.
This weekend it started cycling with the compressor on 1.5-2 mintutes then off for 4-5 minutes. Now the compressor won't even kick in. My back unit is starting the cycling thing also, but not at those short time periods. The units are Duo Therm 13,500 Penguins, model #610015.305. Any ideas?

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  • Dometic Master
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Compressor overheating

Posted on Sep 15, 2017

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6 Suggested Answers

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Posted on Jan 02, 2017

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mikeandkim5
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SOURCE: compressor on ac unit

we have the same problem but it wont dupicate when take it in to be checked replaced lower board but didnot help

Posted on Jul 16, 2008

  • 1 Answer

SOURCE: duo therm air conditioner

my duo therm air works beautifuly all day but at night when we go to bed it seams to turn on and shut off rapidly. what could be wrong?

Posted on Jul 19, 2008

pierre1811
  • 144 Answers

SOURCE: Have Duo Therm roof mount A/C. Fan runs but when

It sounds like the compressor is locked up. You can try a start boost or hard start kit but once this starts the compressor is on it's way out.

Posted on Feb 26, 2009

  • 659 Answers

SOURCE: Duo Therm compressor tries to start and kicks out

I don't think these little units have a start capacitor but what I would do is check that the on/off switch wires to make sure they aren't loose. Also check the wires to the compressor for loose wires as well. It is possible that these are the first signs that the compressor is about to fail. They also can act up some when they haven't been used for awhile and then you try and start them up. Try running the unit for a few hours without asking it to cycle. It might just be a sticky valve.

Posted on Apr 13, 2009

  • 116 Answers

SOURCE: A/C Thermostat display is blank

find the stat wire and jump red to green to see if fan comes on if so then stat bad if not check for 24v ac transformer or 5 amp fuse

Posted on May 09, 2009

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Turn the selector switch to “Cool” and the
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Possible Causes- Check all of this before buying a new unit, that may not be the solution.

“The voltage could be low – ”
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2. “A capacitor could be shorted, weak or open.”
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Caution – There is always a chance that a capacitor is
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Remove capacitors, visually examine them and test
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1 Answer

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Let me know what works for you.

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