[Diesel-Gypsy]

Dave, I have had several other trailers with similar furnaces, the furnace in my Mobilesuite does operate differently.

It is basically a situation where the over-temp fail safe sensors shut the furnace off before it gets too hot because it cannot push the heat through the system quickly enough.

DRV now uses ducting with very low restriction higher volume ducting.
The furnace on these newer installations seems to work much better.

The fan on my furnace is doing exactly what it was designed to do.

Rick