Forum Discussion

Explorer

Aug 20, 2017

Brand new rv 13.5btu AC issue

I have a brand new Winnebago Micro Minnie with a 13.5 btu AC that runs fine but my 3400watt generator won't start it, goes to fault every time with nothing else going. I confirmed my gen to be good by starting a friends 15.0 AC with no problems. His RV was pulling 4 amps before we tried the AC so its not the generator.

So I climb up on my unit and check the start capacitor. The compressor side shows to be good. The fan side no capacitance. Ohm meter shows dead short. I'll replace the start cap but do you think that will solve the problem? It seems the fan side is so small compared to the compressor side.

Thanks Tex

13 Replies

pkhjr
Explorer
Aug 20, 2017
I checked the start cap with a capacitance meter before I ohmed the fan side.
1320Fastback
Explorer
Aug 20, 2017
Ive had it with our new Dometic AC. It consistently fails to run on twin Yamahas and even bogs down on shore power.

Its getting thrown in the trash soon for a new Atwood, which Dometic now owns but hopefully they have kept their hands off it.
ScottG
Nomad
Aug 20, 2017
It's hard to check a cap with a DVM. The DVM charges it and you get odd readings.
If you discharge the cap and then take an initial ohms reading, you should see the value keep changing.
If the intial, discharged reading show a dead short, you've got your man!
I wouldn't worry about the sizing of the components. They are sized to deliver the rated BTU.