2000 Holiday Rambler Endeavor Roof ACs

[rpaoness]

So.... super humid trip to VT for 4th of July and we had flaky AC performance due to breaker tripping. Repaired the communication line to the rear AC and got that one working fine, but worked through several breaker trips for the front AC. Failure-sequence-wise I now believe the main breaker had a poorly installed feed wire that resulted in arcing/heating of the incoming wire and breaker during high load situations. Since the front AC breaker was adjacent to the incoming breaker, it was sympathetically heating and then tripping under lighter-than-rating load.

I have bought a new main breaker and new AC breakers for both units, but at $42 and $18 ea., I'm not sure if I want to spend that much. I should probably just install them since the ones that are in there are 24 years old and subject to all of the thermal/weather/humidity cycles of being in a vehicle...

I guess the only somewhat-counter-argument for keeping the old ones is that once I was home and plugged into 50-amp 240V supply, both units ran with no issue. So even though voltage checks showed 118V+ everytime I checked it under load on both RV generator circuits, the AC's are still somehow happier on the wall power. Perhaps startup-transient voltage droop on the generator is bad. I need to clean and check all wires from the generator up - there's probably 100' of cable since the generator is in the front, transfer switch is in the drivers rear compartment, and front AC is only about 10' or so from the front of the RV.