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Carol Strovers Posted on Jun 01, 2017
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We have a Duo-therm by Dometic thermostat that does not shut the ac off. We have to manually shut thermostat off to shut ac off. Any suggestions what we can try or just replace thermostat?

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Thomas Woodburn

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  • Dometic Master 2,638 Answers
  • Posted on Jun 01, 2017
Thomas Woodburn
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Joined: Mar 07, 2016
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Try plugging the hole in the wall where the wire comes through. Also be sure you are not trying to reach your humidity set point therefore overshooting your cooling setpoint. Referred to "droop" in settings

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

5 Related Answers

Anonymous

  • 1 Answer
  • Posted on Jul 19, 2008

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?

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Anonymous

  • 1 Answer
  • Posted on Aug 02, 2008

SOURCE: thermostat wiring for second ac unit

I replaced one unite with another and the wires are differance colors the old unites wires are red,purple,yellow,bleck and white the new one have orange,brown,cream,darkpurple,and white

Anonymous

  • 1 Answer
  • Posted on Apr 13, 2009

SOURCE: dometic ac in RV

The relay board is exactly what the problem was, thanks "Guest" The 12vdc relays are normally closed and before I replaced the board I was getting a 6vdc to 7vdc reading on the (cool) leg at the thermostat with the breaker off.

motor1258

Mike Butler

  • 6674 Answers
  • Posted on May 27, 2010

SOURCE: I have a dometic duo therm roof ac unit that is

It is a closed system, (ends are soldered) that said, a heating and cooling guy may be able to install fill valves and re-charge for you, but make sure you get a quote ahead of time. How old is the unit? Not normal for them to need re-charge, and I've seen them work good for 15 years, if maintained properly. Has it been completely cleaned recently?

Anonymous

  • 43501 Answers
  • Posted on Jul 19, 2010

SOURCE: Dometic Duo-Therm Model 57915.622 Fan will not start.

Hi, Sounds like your fan motor has gone bad...
Here is a tip about trouble shooting your air conditioner...

Air Conditioner Trouble -Review the Possibilities
http://www.fixya.com/support/r3571569-air_conditioner_trouble_review_the_possi

heatman101

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Related Questions:

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Duo therm ac in my rv quit when the converter burned up does the ac need 12v to work?

there is a fuse located under the shroud on the roof AC on a circuit board that controls the thermostat to turn on the power to the Air Conditioner replace it it is marked F-1 or, on some F-2 etc.
the air conditioner works on both DC voltage for the thermostat and AC voltage for the compressor
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Have a duo therm ac and the low ac and low fan not work -

Thermostat on wall, or manual controls at AC? Did it work for you on low before now? Reason I ask, is that normally they are only a 2 speed fan ( low and high) so if it's a wall thermostat and has been changed from original, perhaps it the way the thermostat is wired.
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I have a 2005 Pilgram 27 foot 5th wheel. My Duo Therm AC unit makes a ticking sound from the ac unit itself when it's not running. Shutting off the Duo Therm analog thermostat does not stop the ticking...

It's obviously on the 12voltDC circuit of the AC unit. Sounds like thermostat, or a relay in control box is faulty or bad connection. If you remove cover on ceiling assy., you should be able to hear it in the control box. There should be a model number on the ceiling assy., get back to me with that number and I can better pinpoint which relay. Also, try moving all thermostat buttons and temperature controls back and forth quickly to see if it may clean off a dirty circuit in thermostat as well. Make sure your AC hydro breaker is off when working with ceiling assy. just to be safe.
51helpful
4answers

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?
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