Noisy Furnace Blower

[Jeffmc81]

Sent: 4/29/2004 8:20 PM

I  just bought a 1982 Winnebago 621. The blower on my furnace is REAL noisy. The furnace works just fine, only a high pitched squeal when the blower starts up. I can't figure out how to get to it to lubricaet it. any ideas??? It's a Suburban.

[DaveVA78Chieftain]

Sent: 4/29/2004 9:47 PM

Not an uncommon problem.  Unfortunantly, most blower motors use oil impregnated copper bushings for bearings and are not designed to be lubricated.  You can try to use a silicon based spray to lubricate the shaft but it may not last very long.  I have lubricated the blower motor in my Coleman a few times this past winter but it is going to have to be replaced.  That screech is a real eye opener in the middle of the night especially when the furnace is located under your head.  I did find a RV place that even sells blower motors for old funaces like mine but i would have to dig it up again.  Your surburban model should be a bit easier to find.  Coleman does not make or support them anymore. 

[Jeffmc81]

Sent: 4/30/2004 2:05 AM

Thanks Dave,
My main problem is trying to figure out how to get at the blower motor. I pulled the seat cushion off to get access to the furnace, but for the life of me I can't see how to take the shroud off the furnace!
I can imagine how that noise could wake you up. Fortunately for me...the wife will be sleeping on that side! 

[DaveVA78Chieftain]

Sent: 4/30/2004 6:47 AM

Sorry to say you will most likely you will have to pull the furnace out of it's nestting place.  Far as I know they are all built like a window air conditioner where a chassis is installed within an outside enclousure.  Mine has some screws holding the chassis in that I access by removing a door/side panel.  You will have to shut off the propane system at the main tank, disconnect the hose to the furnace and mark/disconnect the wires (pull fuse first).  The Intake/Exhaust vent may be attached and have to be disconnected.  There usually is screws mounting the furnace to the floor.  The heating ducts will have to be dissconected.  Use caution with them as they dry out and get brittle over time.
Marks RV (http://www.marksrv.com/) carries parts.  If you order something from them they send you a real nice catalog on CD.  It has a parts section for furnace parts.  Sorry folks, our old Colemans are not listed.

Dave