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I didn't watch him work.....but.....he was banging on something for maybe 5 minutes. The fan is direct drive. When I questioned all the hammering, he said that he was just trying to get a "collar" off the motor shaft....but he said he didn't bend anything(?) I went back to the company, told...

Thanks for the replies! Its not a new furnace but I feel there shouldn't be this vibration problem after getting a new motor. I'm a retired mechanical engineer, so I feel I can evaluate these kinds of problems. Maybe I'll check it out myself but would rather have a company that I can trust look...

This problem concerns my home furnace. There was a squeaking noise coming from the motor. A repair company said the bearings were bad and the motor needs replacing. After they installed a new motor the vibration and noise was 10 times worse. When I complained they said I need a new furnace. I...