[Fasteddie]

Clint has the Dometic 13.5 basement airs rather than the SCS units used in at least 1995 and later coaches.  There are two units stacked, one on top of the other, in the front street side bay and a third typically mounted in a bay behind the right front tire.  I can't remember if Clint has three or four A/C's but if 4, the fourth unit is located in the center of the bay likely under the steps into the coach.  The two in the forward bay are open on three sides.  The other(s) are enclosed and do receive intake air and vent under the coach so it is one of those that vent under the coach that appears to be tripping out.

I had the same problem with my 86 Newell on one of the 3 basement Dometic  A/C in my coach. I also replaced the breaker, but did not help. We live in Texas and when it got real hot that one breaker would open. I could tell when it triped as one of the Voltmeters on the front panel would be at Zero. Never did solve the problem.