Duo therm a/c unit fan wont run blows fuse

SOURCE: duo therm roof top a/c

Sounds like 1 of 3. Blower motor capacitor, relay or thermostat. Try to run fan only if that is an option and see.

SOURCE: Duo Therm compressor tries to start and kicks out

I don't think these little units have a start capacitor but what I would do is check that the on/off switch wires to make sure they aren't loose. Also check the wires to the compressor for loose wires as well. It is possible that these are the first signs that the compressor is about to fail. They also can act up some when they haven't been used for awhile and then you try and start them up. Try running the unit for a few hours without asking it to cycle. It might just be a sticky valve.

SOURCE: my dometic duo therm brisk air RV a/c unit is not cooling the RV

I had the sam problem, took the thermostat cover off and tightend and refastend the wires, so far so god

SOURCE: duo-therm quick cool

Your compressor is trying to restart after it shuts off which is causing a power draw down changing the sound of the fan speed change. Check voltage power supply and insure that the power supply cord is heavy enough to carry the necessary load.

SOURCE: My duo therm brisk air roof mount ac unit is

yep have the leak fixed and properly charged.