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My Dometic rooftop ac stays on for 8 hrs then shuts down and hums.Turn it off for 1-hr will come back on? I wan't unit to stay on?How do I fix this problem?

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Sounds like it needs a service or good cleaning of the filters?
Possibly switching off because has overheated.

Posted on Dec 10, 2016

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1 Answer

Duo-Therm ac when the temerture is reached the fan will shut off but the compressor stays running


Sounds like you hit it on the head--compressor should turn off when unit reaches the preset temperature.

Jun 10, 2012 | Dometic Rooftop RV Air Conditioner

1 Answer

When the AC fan shuts off, the compressor appears to be stuck. It continues to make a humming sound as though it is running. If I remove power and return power it hums momentarily and then shuts off. Is...


Yes, not good for compressor to stay on after being shut off, and hitting the breaker to stop it is a good idea. Sounds like you have a faulty/sticky relay. Not an expensive part, and shouldn't take any longer than 1/2 hr to change. Have a technician, or electrician look at it and give them a model number of unit so they can make sure they have a relay with them when they come. That way, another trip back, as well as a service charge will be eliminated. You have capacitors in the same area, that are very dangerous to work around if not experienced, so make sure the person is experienced, to avoid shock from 250-370 volts stored in those capacitors.

Aug 07, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

I have my dometic Rooftop ac unit. The heatstrip/fan run perfectly but when I turn on the ac...the fan runs good but when the compressor kicks on it just hums.


The compressor coming on does make a slight "humming" sound which is normal. Is the unit cooling properly? Do you think it is louder than before?

May 09, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

AC ROOF TOP CYCLING EVERY 5 MINS


well most unite will go to 54 degrees but 43 that coooool man what complain about. the compressor dose shut down at certain temp so as not to turn into one hunk of ice. that what they are design to do.

Jul 06, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Have a coleman rooftop unit a/c unit, after about an 1 hr. unit hums no air comes out


COLEMAN R.V. AIR CONDITIONER SERVICE AND REPAIR QUESTIONS
COLEMAN R.V. PRODUCTS
GO TO rvcomfort.com

Click on RVP (RV PRODUCTS)
Click on type of AC, if you can’t find the information you want there,
then click on contact us on the Green Bar.
You can get Service Support or Email address and Phone numbers.

Jun 07, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

RV Rooftop AC Unit


Sounds to me like your fan is hitting something
Remove the cover and turn the fan by hand ( with the power off ! ) See what it is hitting

Oct 24, 2008 | Dometic Rooftop RV Air Conditioner

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