southerly001

There are many online forums regarding this issue. The blower motor bearings fail. It is located inboard of of your water heater (on mine, 32V, RH side of coach). If you stick your head in the water heater bay, you can see the heat ex-changer. It blows aux heat backwards through the duct used by your gas furnace while you are on the road. I have not had to remove the blower, but hear it is not fun. Sounds like best method in many cases is water heater removal first.