[AlwaysHomeNow]

Its fixed - Yeah!

We took it to a service shop. The control board had gone bad. Now it works great again.

Thanks for all your input.

BTW - we've found loose wiring in a number of places in the trailer. One of the connections for the furnace was loose, but didn't turn out to be our problem. I think at some point we'll open all the junction boxes and redo with good wire nuts. Whoever does the wiring at Doubletree just doesn't do a good job.