The Blower fan on my A/C will not run in cool mode, but if I turn on the furnace it starts up fine.
- posted
16 years ago
Problems central air
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- posted
16 years ago
So something is broken -- could be the thermostat, could be the relay, could be the wiring, could be one of the motor windings (furnace blower is usually a different speed from AC blower). Get in there with a VOM and diagnose it, or get somebody who knows how.
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- posted
16 years ago
I just replaced the thermostat so I know thats not what it is.
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- posted
16 years ago
No, you don't.
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16 years ago
That logic has caused a lot of frustration. The replacement could be bad or the wiring could be wrong.
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- posted
16 years ago
... assuming the new one isn't defective, that it is compatible with your system, and that you installed it properly