My two Coleman 13,500BTU units in my '94 Bounder were working after 22 years. The rear never had a problem and I'd use it as a backup when the front unit went a bit squirrely. And that happened if it wasn't run until it was already hot. Then it would trip out on one of the limit disks. If instead of starting it up after it was hot, I started running it early in the day, it would run fine all day and into the night...
My '02 Winnie with the basement heatpump unit has worked fine since I bought it last year, and it's also a Coleman. 15 years so far on that one. Fingers crossed for another 10 years out of it.
