"Charlie Self" wrote in message
oups.com...
It may only be the capacitor. My knees are acting up, so I hate
climbing the pull-down to check the thing out again, but I guess
tomorrow evening, when it cools down, is a good time. I've got to drop
a jointer at a freight company tomorrow a.m. early, get that off my
back (3 to go!). There may be some fun with the capacitor, as the
furnace is at least 20 years old. Worked when I got it 5 years ago.
With the gear I have now, the best way to check the capacitor is to
get the numbers, buy a new one and try it. I did locate my small
multi-meter a couple days ago, right on the beam running down the
center of the attic, next to the furnace.

Most fan motors don't use capacitors, but they do need oiling, at least the
20+ year old types.