[alltaken]

My mother has a 35 year old electric Sears Furnace. It heats fine, but the fan (or something) makes noises and perhaps a heavy vibration in the plenem (spelling) for a couple of seconds on start up, then appears to run smooth and balanced in the heating phase. When shutting down, the nosie starts up again making a dit, dit, diiittt, ddddddiiiitttt, sound as the fan slows to a stop.

When I open the access panel and manually spin the fan it makes a dragging sound as if the fan is dragging on the housing as some point around it's circumfrance. So I do not suspect the motor itself. Perhaps the fan bearings are failing and causing some unbalanced rotation at slow speeds.

1. Thoughts on the diagnosis?

2. Where can I get parts for such an old beast?

3. How would I go about fining someone knowledgible and capable to repair this old furnance. Or should I just do it?