First, hello to all those who read and post here. I am a newbie to this forum and like many I ended up here trying to solve an immediate problem. However, since thereís always a new immediate problem I hope to stay a while.
I have a Ruud gas pack furnace c.1996. About three weeks ago it started making a horrific noise and stopped heating. If I turned off the heat and just ran the fan it ran fine, so the main fan motor wasn't the problem. It was pretty obvious from the noise that the induced-draft blower was bad. I ordered a new one from electricmotorwarehouse.com and installed it and presto! My heat had never worked so well. The old blower assembly was corroded beyond belief. Only about one fourth of the squirrel cage was left, so I have no doubt that it was bad.
Then two nights ago I notice the house is a little chilly and check the thermostat. I could hear the "tick" sound indicating that the heat was supposed to be engaging, but the blower never turned on. When it was working the inducer motor would start as soon as the heat was supposed to engage I think. Again the fan is fine. I had the controller board replaced two years ago by a professional since that job seemed beyond me. Just from visual inspection I donít see any indication that anything has burned out on that. The controls seem to be working. Iím thinking maybe the new blower has died on me. The old motor showed no signs of burnout, just age. In fact it was still spinning even in its horribly corroded state. This new motor just doesn't seem to be doing anything. It's not frozen; if you spin it by hand it spins freely.
My question is, are there other reasons the inducer might not spin up? Is there a laymanís test I can do to see if the new blower is bad? If not, is this a common thing? Are electric motors sometimes just bad and flake out after a couple of weeks, or do I have a deeper problem? Is there a relay or something that could have killed this motor? Many question, I know. Any help or advice would be greatly appreciated.