Question about Heating & Cooling
We have a plenum heater that periodically makes a VERY LOUD buzzing noise (lasts from 15-60+ seconds). It happens when the furnace comes on and seems as though a switch is getting stuck. It will continue to have a low buzzing noise for several minutes. Any ideas?
Is the fan relay going bad it is located normally inside control box behind panel where wiring enters unit
Posted on Jan 04, 2009
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Posted on Jan 02, 2017
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