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Humming noise from furnace
ricktenopir
Nov 22, 2013, 04:30 PM
Furnace is working but makes a humming noise sometimes usually before the blower starts, but sometimes will hum when the blower is not running.
ma0641
Nov 23, 2013, 07:41 AM
You may be hearing the inducer fan. It may be loose, bearings or unbalanced impelled. Go to the unit and try to pinpoint. Let us know what you find.