AC compressor won't run, tried new cap, 83 VAC at terminals

[Artem]

We have a 2004 Springdale and our AC compressor stopped working 6 months ago. The fa works, but compressor does not come on.
I read some RV forums and replaced the starting capacitor with a Supco SPP6, it only cost $12 so I figured I would try.

It did not help at all. I'm only getting 82-85V at all capacitor terminals. It does not seem right, unless I am missing something in the equation. Every other outlet in the trailer shows correct 118V.







Please help, where should I look at?

[adonh]

Your best bet may be a new AC unit. You probably have a 13,000 BTU unit and can upgrade to a 15,000 BTU unit. I replaced both of my 2005 Dometic Penguin 13,000 BTU units with new Dometic Brisk II AC units Dometic B59516 Brisk II RV Air Conditioner 15,000 BTU White and I am ready for the Texas summer. This is their new model AC unit and its better insulated, quite and cold air.

Good luck

[dwhit]

Blower contacts have 110?

It's possible the fan would run at 85vac...jus' not full speed.

Check thermostat switch?...maybe bad contacts.

[Artem]

Actually I think I figured it out to be a K4 relay in the analog control box.

I opened it up, and see the black square box with a blue and black wire in the middle:

When I shorten these two wires (I used my pliers and the sparks burned the terminals a little), the compressor started to run!

[dwhit]

WHEW!

Good job Artem!

Relay not functioning...

[C-PHartley]

Are these relays available for replacement? If so,where can you purchase them. Thanks

[Artem]

Originally Posted by C-PHartley

Are these relays available for replacement? If so,where can you purchase them. Thanks

I bought an entire analog control box, search it by the part number and it came to $81 w/S&H. It should also come with a new thermostat for some reason, I don't think I will need it.