Question about Heating & Cooling
SOURCE: fan will not turn off
With your breaker on, the system selector switch (at your tstat HEAT/COOL/OFF) in OFF and the Fan Switch (ON/AUTO) in the AUTO position, Trace the wires from the Blower Motor to the blower relay. Try tapping gently on the relay using the plastic handle of your screwdriver/nutdriver. If the blower shuts off, the blower relay is sticking and needs replaced. Fortunately, this is a problem that will allow for the system to continue to control the temperature while you are awaiting your new part to arrive.
This is the problem for 90+% of the problem you are describing. If this does not resolve your problem, let us know and we'll look into another area.
Good Luck in your endeavor! :-)
Posted on Mar 03, 2010
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