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Thermostat ? no matter what temperature is selected, the compressor keeps running and doesn't cycle off.  compressor shuts off when just fan is selected, but cool mode just keeps chilling.  unit is six months old. energy saver does not work. unit just keeps running.

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  • ljm52381 Jul 23, 2008

    keeps running after room is good and cold.

  • VRODG73 Jul 23, 2008

    I'M HAVING THE SAME PROBLEM. THE COMPRESSOR RUNS CONSTANTLY. I THINK THE THERMOSTAT ELEMENT IS WORKING DUE TO MY USING AN ICE CUBE ON IT AND THE CLICKING NOISE IN THE REOSTAT CHANGES AT THE MUCH LOWER TEMP, BUT THE COMPRESSOR KEEPS RUNNING COLD TO THE POINT I HAVE TO MANUALLY CONTROL IT.

  • B Carson May 11, 2010

    Does it keep running after the room is good and cold, or does it run and not cool the place?

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I'm thinking the bi-metal is working, that's why you can hear a click, but the contacts are welded together. The bi-metal doesn't have enough strength to break the weld. Time for a new thermostat.

Posted on Jul 23, 2008

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I have a 16 SEER Goodman air conditioner and during the morning hours, temperature ranging 75 degrees outside, the compressor comes on but not the outside fan. It only runs for a minute and a half then...


The fan is shutting off in order to maintain head pressure when the outdoor temperature is low. This is common on 16 seer and above systems. It helps your system be more efficient.

Jun 06, 2011 | Goodman Air Conditioners

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Dometic unit cools great but compressor does not cut off when desired temperature is reached. The thermostat is on wall. The fan will cutoff at proper temperature but the compressor keeps humming and...


Hi, as you know the thermostat controls the unit. Here's what you need to do first. Go to your thermostat on the wall, pull off the cover. You are looking for the main control wires that come in from the back to connect to the screw terminals. Don't be afraid of shock as these are millivolt wiring connections.You say the fan shuts off but the compressor keeps running causing it to ice up. You need to get a screw driver and disconnect the wires from this stat. This should cause the compressor, fan, and all to shut down. If it does, you know that your thermostat is faulty and you will need to make your self a drawing on the wire connections, remove the stat, and you can get a new one at a RV sales and parts house.Find your breaker box where your main wiring comes in and shut off the a/c breaker if you like. Now, if the compressor keeps running after you disconnect it from the thermostat, then somewhere from the stat to the controls on the top have a hot wire that is touching somewhere causing the compressor to be energized all of the time. If you can go up top and find where this thermostat wire comes in, look it over good to see if the red is touching the yellow wire some where. I believe you just have a faulty stat at this point. Do what I asked on the stat, disconnect it completely, and we will go from there. You can get back to me by leaving a comment under my user name. Please let me know and we will take care of this problem.
Sincerely,
Shastalaker7
A/C, and Heating Contractor

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1 Answer

I have a camper with a Dometic rooftop air conditioner. The Model No. appears to be 3310700.012. The thermostat it the type that fully shuts off the unit (compressor and fan) when the set temperature is...


no both the options A and B which you gave cannot be done.yes option B is possible in some form.but in this case fan will not shut down and this will burn the fan motor and even make the fan wirings short/.so option B is also not advisable.but the problem is either in the thermostat or in the thermostat shut-off relay.the voltages needs to be checked by meter to confirm the fault. This will help. Thanks please keep updated.please do rate the solution positively .thank you for using fixya

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