I was getting my Scamp
ready for a trip today and turned on the furnace
. After the blower had been on for about a minute it let out a screech that scared the
out of me.
I decided to fix it today and was not looking forward to it as I have never worked on a furnace
. It turned out to be a fairly easy job. The only thing that held my furnace
in was 2 sheet metal screw in the front and the rusty combustion air exhaust pipe to the outside. After disconnecting the gas line, 4 wires and removing the outside exhaust flange the furnace came out fairly easily.
On the back of the furnace there is a cover for the exhaust bower fan that is easily removed. I cleaned out 2 wasp nests from the blower fan assembly, oiled the front and rear bushings on the fan motor and tightened all of the loose sheet metal screw on the furnace assembly. After replacing the blower cover I used 2 jumper wires from a 12v battery
to the fan motor and it ran for about an hour on the bench in my shop without any noise. It is now back in the trailer and running very quietly.
I have read a few comments about noisey furnaces and thought I would let you know that it is not a very difficult job to quite them down.