Question about 2001 Chevrolet S-10

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S-10 blazer heater

Heater begain to blow warm air instead of hot air .even while on high setting.?thermostat ?? or bigger promble.

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The Idle Air Control valve might be bad and may need to be replaced. It should be located on one of the heater hoses. You can take the cable off and move it one way or another to see if it will get hot. If it doesn't then it should be replaced, or the heater core might be clogged.

Posted on Nov 27, 2008

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