Heatpump: only one compressor working?

[Madrona]

Originally Posted by adventurous2

If the capacitors are the same as mine, it is very easy to see which failed. It is literally charred.
To access the heat pump you need to open the outside panel. In our 2003 model there are two hidden screws under the left side underneath the coach and two screws on the right side after you open the door to the LP compartment. Then there is a small steel plate on the left side of the heat pump, with one screw. The circuit board and capacitors are behind it. If they are bad it will be visually evident. Also check the wiring and the circuit board for damage.The capacitor can easily be disconnected and you can just order a new one from RV Products Airxcel . They were very helpful. They may also be able to trouble shoot some more as to why nothing happens when only one circuit breaker is turned on. (that is how I read your letter.)
Hope this helps.
Ellen

Thank you Adventurous2 for the great explanation. I had the same issue and couldn't find this thread with a search. I started my own and Sammie pointed me here. I will include a couple of pics of what these look like for anyone else with the same problem.

[Ray,IN]

Originally Posted by hamguy

" have them replace burnt wires with heavier guage."

NONONO. You might as well tell them to put in a larger breaker. Wire size is dictated by the manufacturer and is likely correct for the application.

I agree. I want the cheapest, easiest to replace, part to fail first.