I can turn the motor fan manually and it turns freely, but when you turn the fan switch on (inside the camper) the fan stops. you can still turn the fan manually but it their is resistance. Any suggestions?? I have already replaced the starter capacitor.
If the run capacitor does not fix it bad motor.
SOURCE: PROBLEM WITH DOMETIC RV ROOFTOP AIR conditioner
Check at the compressor terminals between the Red and the terminal for the overload protector to see if you are getting power to the compressor on startup.
SOURCE: rv air conditioner leaking
I have the same problem....it is a negative pressure problem holding water inside the unit until it overflows the pan and runs into the duct system. why this occurs....I don't know....I cant find a problem with my air return, but as soon as you turn in off, the water comes gushing out the drains on the unit. I resolved this....temporarily....by twisting up a paper towel into a wick, and placing one end up into the drain tray, with the other end lying well out into the exterior case. This lets the water wick out and keeps the tray drained. I don't understand the problem and don't know what the permanent fix will be, except maybe cutting a hole and placing an intake vent directly below the unit.
SOURCE: RV air conditioner. Compressor running, fan stops before cool
The fan motor is getting hot and going off on the internal overload in the motor.
This is caused by either a low voltage, a bad capacitor, or tight or dry bearings in the motor.
To check the bearings turn the power off to the unit, then spin the fan blade if it spins freely then the bearings are ok.
To check the capacitor you will need some kind of tester or you can buy a capacitor and replace it, that's what a lot of people do. They usually don't cost very much.
To check the voltage you will need a voltmeter and measure the volts at the unit.
SOURCE: My dometic RV rooftop air conditioner is leaking
Remove all covers and look down with them removed and see if the coil drain pan has a stopped up exit where the water drains out and into the rear of the AC unit.
If the unit is off level it could cause a draining problem too.
SOURCE: Rooftop RV Air Conditioner: replaced capacitor on dometic 59516-531 steal trip...
You need to borrow a clamp on style amp gauge, and check amp draw on black wire in box where hydro wires connect. (PLEASE, be careful, and if not experienced in this type of test, don't try it, due to likelihood of getting a shock. ) If it's the compressor kicking in that's causing the breaker to trip, and capacitor is good, then it's usually a problem with either low incoming (supply) 110-120 AC voltage, which will cause high amperage draw, or compressor on it's way out causing high amp draw. If it's only drawing 15-18 amps, and your tripping a 20 amp breaker, then breaker is getting weak.
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