Hello,
I saw your post on the Forest River Forums site about the problems you were having with the furnace shutting off in the middle of the night. About 3 months ago I purchased the same unit with the same type of thermostat as you showed in the picture and am having the same issues. It runs for awhile then shuts off, and sometimes it just blows cold air. Did you ever figure out what the problem was? I am at a loss here.
Thank you for your help.
Cheryl