woods-rider

RV AC Help

4 posts in this topic

So, a while ago I bought a new in the box rooftop AC unit for my travel trailer from a guy on craigslist. Unfortunately, I didn't get around to installing it until now and I may have been ripped off, but maybe I just screwed something up.

 

When I am plugged into shore power and I turn the AC unit on to "cool" nothing happens, the compressor doesn't run, the fan doesn't run, nothing. If I turn it onto just "fan" nothing happens either.

 

I took the cover off the top to check if there was power up there and there is a full 115V going to the compressor and the fan. All 4 wires on the compressor (grey, blue, red, brown in the pic below) have 115V when the switch is in the "cool" position.

 

I took some resistance measurements between the compressor terminals, but don't know what to make of them other than it doesn't seem to be shorted or a broken wire inside.

I got:

0.5 ohms between R and C

3.7 ohms between S and C

4 ohms between R and S

 

Any help, insight, advice, or name calling appreciated.

 

57AA91A9-57FB-4FDD-A5BC-65789EA67077_zpsk1wrqfbx.jpg

94998FC0-9C94-453E-8CB9-C40D3A58A1ED_zpswrdbhzd7.jpg

60FB57F2-20D0-41BB-90CE-34A6D84815A2_zpszvfkiwvd.jpg

 

IMG_0192.JPGIMG_0193.JPGIMG_0194.JPGIMG_0195.JPG

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Have a home AC guy you trust? Nothing different.


I don't. I also don't want to pay for someone to fix it as I could probably buy a new one for about $100 more than that would cost.

I think I'll look into testing the capacitor and starter relay next.

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Good luck. For whatever reason elect stuff is very alien to me, just don't have any understanding. And its scary too!

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