"PaPaPeng" wrote in message
...
On Fri, 12 Nov 2004 03:44:52 GMT, "Rich"
wrote:

Dirty, dusty vents, filters, coils etc.

Plus don't use any lube oil on the blower bearings. They are meant to
run dry. The furnace heat will give you a smell of oil.

That statement is in direct conflict with the maintenance instructions on my
older furnace. If my blower bearings run dry I don't have a functional
blower for very long. I have never noticed the smell of oil after doing my
yearly furnace tune-up. I think better advice would be to consult the
maintenance instructions on your own furnace.