[scottz]

I ran them all day today with the fans on high; no freeze ups. A solution, but not a great one; I hate listening to the fans all the time. That would be great if MicroAir could come up with something. The fix is to power cycle the unit. Maybe MicroAir could program it to wait 10 minutes after the freeze up then do a power cycle. This is still a work around for Dometic's problem. Actually I think the problem is Keystone's installation. These units are plumbed into the same ducts; when one shuts down, the other can continue to run and blow cold air into the shut down unit. That's my theory.