Dometic a/c runs then shuts off and back on in a mater of seconds

DuoTherm by Domestic-Fan runs, no cold air - iRV2 Forums

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Jan 22, 2012 - 12 posts - ‎4 authors Duo Therm by Dometic 13500 BTU air conditioning with ducting, furnace. I. ... If the fan runs but no cold air and the compressor feels like it is ...

A/C just stopped blowing cold.....any ideas??! - RV Forum

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Jul 27, 2008 - 23 posts - ‎6 authors We have run it continuos like this before without any troubles. Thanks for the help! ....When you switch the AC unit on, the fan runs, but the compressor doesnt fire up. You used to be able ... You can find Dometic here. Logged. Dometic Duo Them Air Conditioner Cycles
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try running the fan by itself & see if it is still humming. isolate which component is the issue

There is ice forming on the evaporator coils. This is either from a low freon charge or a leak in the seals or windows and doors. Could also be that the drains are not working and water is building up and freezing

this appears to be a stuck relay or contactor . follow the wire back from the fan and locate the contactor or relay slp it and see it it comes lose. ?? this does not mean it will solve the problem as you will still have to repalce any part that is causing it.. Hope this helps let me know Jon

Check the capacitor. It should be a dual capacitor , runs both compressor and fan. This sounds like your problem only because both the compressor and the fan go out together. Good Luck Hope I helped

Dave

fan relay located on passenger side under hood in power distribution center, turn cover over to find correct relay

Replace the compressor run capacitor.

Depending upon the model of your air conditioner, this may be normal operation.

My newer Dometic air conditioner will run the compressor in a "reverse" mode without the fan occasionally in order to heat the coils. This is done to defrost the coils. After the frost is gone, the fan switches back on and everything goes back to normal.

call dometic dealer. I hear they have a bad circuit board that is replaced.

I would suggest getting an electrician to check the current running through the wiring. I had installed a similar fan in my grandmother's house a couple of years ago and had the same problem. After a couple of months of constantly changing bulbs, I brought in an electrician to check the current and found that there was a short in the wire which kept causing just enough of a current surge to blow the bulbs.