ac blower not working?

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  #1  
Old 12-07-13, 09:39 PM
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ac blower not working?

I have a central ac unit. The compressor is working, vents not blocked, new filter, blower comes on when heat is turned on. But the blower will not come on when the thermostat is turned to cold or fan is turned to on. Blower will work when i turn it on manually, by the switch on the blower. any ideas why the blower wont turn on when thermostat is set to cold?
 
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Old 12-08-13, 06:08 PM
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Probably a faulty control board or a loose wire connection to the high speed fan wire.
Post the make and model of the furnace.
 
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