[berghild]

now those are some helpful ideas! I think the heat is escaping somewhere other than the one disconnected duct that Howard found.....but that's just a hunch. it doesn't shut down it just barely puts air out at the back of the coach and it's just barely warm (after it it warms up the ductwork I think). I have owned several other rigs and I know it should be keeping us plenty warm.
It has been 39 here in the sierras in the mornings and our lil' electic BIG HEAT is doing the job just fine for now. thanks for the help. Cyndy