Top 20 Dometic 457915 Duo Therm Brisk Air Conditioner Questions & Answers

you may need to reset the polarity.

Low freon causes short cycling

http://www.dyersonline.com/rv-appliances/air-conditioners/air-conditioner-parts.html?limit=all Here a link to parts online not sure which relay you needed.

Low freon switch prevent the compressor from running when there is not enough freon to carry the oil to lubricate it. There is almost always enough pressure to start it but as soon as it's running low pressure drops and the compressor stops.

Sounds like the compressor is seized up and the smell is from the clutch slipping when it tries to engage. If that is the case, you need a new compressor at a minimum.

http://www.dometic.com/QBank/EPiServer/Dometic/US/Manuals/RV-manuals/Air-Conditioning/Penguin-Brisk-Air-Installation-Operating-Manual_17591.pdf

have to go through return air opening.

board or cable issue between thermostat and board.

sounds like duct damage or restriction in duct work.

check amp draw either bad compressor or fan motor

Call for AC / refrigeration service, it needs refrigerant gas and needs to be checked for leaks. https://www.google.com/search?q=Dometic+Duo+Therm+short+cycles ..

check compressor relay possible stuck on

make sure thermostat on auto possible start up capacitor on compressor

possible heating element bad

check and test compressor relay and circuit

if power to unit and thermostat is calling for action then check start up capacitors

Start simple, verify proper voltage. Check capacitor. Then check motor.

https://acerrorcode.com/dometic-thermostat-error-codes.html

no info -look in your paperwork for your trailer unit and the mystery a/c unit and look up the trouble code in owners manual --notify jayco of problem --do online search of a/c using make and model for trouble shooting guide - rv shop

So original was ecm and you’re installing psc?? All low voltage speeds will go away and you just need to break the new, high voltage speeds, with a relay. Hope that helpsI can’t find info on the 135a. Does it have a control board to land wired to?? What model motor???Can’t make out the original wiring diagram. The white is your common or neutral. The different speeds are for constant fan speed, cooling speed, and heating speed, this is your hot. Not sure if you have a control board in your unit but if you do it will say “common/ fan/ cool/ heat/ park for places to land your wires. The browns go to capacitor and the orange and purples would get swapped if it were running backwards. ( meaning blowing air out of filter rather than pulling air through filter. Zip tie loose wires to prevent getting caught by wheel.