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I have an older Miller Furnace in a mobile home that I own. The unit was made around 1977-78. Think the model number is MGC-80-1. It does two things that seem odd. 1st is it will kick on like it should, warm the place up, then shut off. Then about 30sec-to a minute later, it kicks back on again briefly, then back off. It might do that a couple more times, even if I turn the thermostat down after the initial turn on. Is this normal? Secondly, the blower was replaced back in March of this year when I moved in. It works great. But when it's running, there's a rattle, like a loose bolt with a washer rattling against it. I tried removing the blower housing, then manually run the fan still in the housing, and the noise wasn't there, but setting the blower back on the furnace it's self, the rattle comes back. Sounds like a rattle from inside the furnace somewhere, towards the front, any ideas?

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Sounds like the fan control is playing up try cleaning the back of it could have dust in it cleaning my help fan could be a loose spindal which the fan spins on see if this helps

Posted on Nov 06, 2010

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