Thor Forums

[Wrpt58]

I just figured out you have a Class C on a F-450 chassis. There isn't much of a doghouse there.
Still, lift the hood and give a good look under there. If there is a removable doghouse, remove it and inspect. Also look at heater control valve and ducting, just to make sure that wasnt the problem. (I don't really think it is).
Did you hear an exhaust leak? If the exhaust manifold was blowing up against the firewall/doghouse, that might do it. Again, that is probably stretching reality.
Recie