Ford Windstar
Chevy Corsica
Heater Cores and Blower Fans
Pontiac Grand Prix

What could be wrong if the front defroster and AC on a 1991 Chevy Corsica are not working and it seems to be the blower motor because when you turn the setting to heat it works?


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Wiki User
2005-04-03 04:22:25
2005-04-03 04:22:25

Replace your heater selector switch


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The ac unit compressor will run when it is in defroster mode and heat setting is on.

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Check that the wire on the rear defroster is connected to the defroster. If broken off repair it.

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you have to make sure there is no short and check for voltage amount at the strips of the window to make sure defroster is working

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you either have a blowed fuse or a wire crossed

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most likely your air conditioner needs recharged per my mechanic brother-in-law

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