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#1 Posted : Wednesday, July 17, 2013 12:42:14 PM(UTC)

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Joined: 7/17/2013(UTC)
Posts: 1

The furnace blower motor makes a loud hum when the blower starts up. This happens in AC or Heat modes. I have replaced the run capacitor, which made no difference. Once it starts up, it runs relatively noiselessly (just the moving air noise of a normal blower).

My question is: I now have a spare capacitor and both caps have multiple 1/4" tab terminals on each pole. Can I stack two capacitors and will this stop the hum.

The cap is 7.5uf/370v, as called out in the manual.

G24M 3/4-100A-2 is the Lennox model number.
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