Question about Heating & Cooling
Where is the fuse? I think that it may have blown when I was installing a new thermostat.
If there is a fuse it will be on the control board inside the air handler. if there is no fuse then it would have ruined the control transformer.
Posted on Dec 03, 2012
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Posted on Jan 02, 2017
If the fan runs in the ON setting then you have a bad fan relay for the heat mode.
Did you install the t-stat before or after the problem?
If after, you have a bad fan relay.
Posted on Feb 21, 2009
SOURCE: Loud noise
It is probably a rotary compressor unit.
They tend to make a start up noise.
Some technicians advocate adding a booster starting device to help the compressor start more quickly, thereby reducing startup noise.
Posted on Mar 12, 2009
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