Just made the drive home & it dripped again on the road, although maybe not as much as before.
It was hot weather driving 4 hrs across FL in 95 degree weather, but it leaked on the trip over last Friday when it was mid 80's.
I wonder whether I should consider replacing it rather than chasing the problem. It has never been adequate to cool the coach in hot weather (best it could do today in 95 degree weather was low 80's). But it is a 14,800 BTU Dometic & I'm not sure I could get a replacement much, if any, bigger. It is only 2&1/2 yrs old but it has been used continuously since we leave it on when parked at home set to 78 or 80 & set it at 76 when we're on the road.