For a very short time.>>>Dan
I just finished fixing my Suburban NT40. The control board was bad. Anyway, I had to pull the whole thing out. Then the furnace itself slides out of a sheet metal cabinet. Then you have access to all the components. On mine the fan was noisy. Turns out it had slipped off its drive shaft enough to be rubbing on the housing. Pushed it back in, and it is quiet and free running again. The motor has sealed bearings, I don't think you could lube them. But yea, you'll likely have to pull the whole thing out.JC
...My suggestion-just buy a new furnace. Good Luck, TomC
If tht is original to the coach, I'd bite the bullet and buy a new one. Fit is the same..