[PMCBR]

For the brief time I have owned my coach I have discovered the most problems with my basement air is design. Mine is a 1997 and the basement units exhaust and intake are under the coach next to each other. If yours is the same I think this is your overheating problem and causes your breaker to overload and trip. Now if you have the units that exhaust or intake thru a vented compartment door then forget what I said.  The coach I have does fine when traveling but when it is parked the units overheat. I have changed the cowling in the bay and leave the bay door open. I am soon to have these doors vented so this will not be a problem.