I have Kenmore Power Miser 80 (867768020) which I have already serviced myself a few times, but I am having trouble locating a part that Is starting to go bad. It's the transformer that the vacumme switch, ignition system, and exhaust blower fan plug into. I noticed when my furnace wasn't working so I went downstairs to the transformer humming and "stuck". It would not initialize the exhaust blower, which will not allow the furnace to start. After cycling the furnace and whapping it a couple times, it works again. However, it did have to be whacked a couple extra times before it kept working and i'm not sure how much longer it will last. The serial number I found on it was 882298 1003 OR H0607026HW (both are on it) and it it a Honeywell product. I was not able to find a replacement anywhere on the web. Suggestions?