20 Most Recent Dometic 457915 Duo Therm Brisk Air Conditioner Questions & Answers

sounds like duct damage or restriction in duct work.

you may need to reset the polarity.

have to go through return air opening.

board or cable issue between thermostat and board.

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

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 causes short cycling

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.

I was replacing a DUO-Therm 3105058 Rev A. very old Thermostat in a Coachman RV with 3106995.032 from Amazon. After looking all the information on the directions it was clear I would have to play a hit or miss on some of the wiring. Instead of using the same coding, such as RC, RH, G, Yellow and such. they used the function and I had to guess at some.Here is the wiring I found worked:There are 6 wires. One set of two wires (white On the W & red on the RH) and the set of 4 (yellow On the Y, green on the G, red on the RC and blue on the H). So to keep it simple the red on the RH went to the +7.5. The White on the W went to the FUR. HS/HP not used. the Yellow from the Y went on the cool. The green on the G went to the fan. The red on RC went to GND. and the Blue on H went to Hi fan.So red (RH) of the 2 wire goes to +7.5White (W) of the 2 wire goes to FUR.Yellow (Y) to coolGreen (G) to fanOrange or red from the RC lug goes to GNDBlue (H) goes to Hi Fan

check amp draw either bad compressor or fan motor

possible heating element bad

check compressor relay possible stuck on

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 ..

make sure thermostat on auto possible start up capacitor on compressor

check and test compressor relay and circuit

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