Dometic Heating & Cooling - Page 4 - Recent Questions, Troubleshooting & Support

If it had batteries try changing, or cleaning the contacts, still malfunctioning, change thermostat universal will work if wired type.

I'm assuming when you say 'doesn't work' you mean 'nothing comes on,' i.e. the fan or the compressor.

If that's the case I would check for the AC breaker to see if it's tripped. Usually a 'tripped' breaker will look half on and half off, but sometimes it will be completely in the off positiion. Either way - it's usually because of a malfunction of the AC unit, so if that's the problem I would moniter it closely to see if it trips again. If it trips again in the immediate future I would then want to investigate the AC unit for the cause.

Also, some RV's have fuses in the AC circuit - so you could check and see if you have any fuses labled AC or AC control voltage. If so - you can usually - tell by looking whether they are bad or not. If that's not possible try replacing your 'AC labled fuse' with a new one of the same size.

I would also check your power supply (where the power cord to your RV plugs into) to make sure it is providing the proper voltage to your RV. Note: They also have breakers out on the box that you can reset. If they (breakers) appear ok - and you are at a RV park you could have the Park personel - check and to be sure the proper voltage is availible to your RV.

good luck!

clean the dust off the bottom

Unsure if that is a refrigerator or an Air Conditioner. Please add information to your question as to the model, or whatever you can tell.

If the main RCD is tripping it indicates current is leaking to ground because of an appliance fault. If it is the micro circuit breaker that is tripping it indicates a short circuit or an overload, also due to a fault.

ceiling assembly ?

need to check and test fan

Search with manufacturer website and also review of users. You can with Carrier,Hitachi,L.G.,...........

need to see if drain pan stopped up or fan blowing water off coil

the same one from the service agent spares

The wall thermostat is not the "Switch" that operates the A/C unit; it carries a very small current at low voltage to operate the contactor, to powers up the compressor. The contactor makes a clicking sound as it closes and the compressor should start immediately. If the contactor clicks closed and the compressor does not start, that will require a professional to do further diagnose. Working with 120 AC voltage is dangerous and should not be attempted without the necessary knowledge. However, it is safe enough to fool around with the thermostat, but stay away from the other electrical circuits An ordinary house Honeywell thermostat that is available a Home Depot will work in an RV and is a lot cheaper than the original RV unit. A house thermostat operates on 24vac but some RV's operate on 12DC. The thermostat really does not care, because it only relays continuity to the A/C contactor and does not carry the amperage load. You should avoid getting a house thermostat that has a little glass bulb with some silver liquid inside. (Mercury), because the level and movement of the RV can negatively affect the temperature setting

check breakers the clicking is dc activating relays. check high limit on furnace might be manual reset

not enough cooling gas

read the manual. that's what the professionals do!! If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

if it lines up it is only a flue or vent to exit exhaust or hot air

You may just need to upgrade to a newer duo therm. Check out Dometic RV Refrigerator Parts and Products for Sale he's got a couple.

First replaced the thermostat then check on condenser unit that's outside .make sure the fan is running when compressor runs .if not there is your issue .If fan runs and compressor keep shutting off you might have a dirty coil so clean it out with water or you might have a leak in the system causing unit to shut off on low pressure .if this is the case you need to call a service technician .
Try simple things first like clean coil ,capicator and fan operation.