2004 Chevrolet Impala Logo
Posted on Oct 05, 2009
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Heater / defroster is blowing lukewarm air only. It seems to work just a little better if the fan is on half. When it is on full the air seems cooler.

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  • Anonymous May 11, 2010

    Are there any other "cold" issues with the vehicle? This will help pinpoint the possible cause to a better extent. i.e:Is it coming up to normal operating temperature on the engine temperature gauge? Initially, it could be one of approxiamately 3 or 4 things.

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Charles McElchar

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  • Posted on Oct 05, 2009
Charles McElchar
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If ther temp. guage is comming up to normal then most likely air in the heater system (need's bleeding) if the temp. guage is below normal then its a faulty thermostat.

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  • Posted on Oct 05, 2009
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Is the cooling system full,if so you may hve to get the heater core cleaned as they can plug up if the dexcool anti freeze has not been changed,could also have defective thermostat(stuck open)if you have gauge does it go half way or stay low temp,other causes could be stuck air blend door in heater system

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