Mechanics

HEATING SYSTEM

2002 Chevrolet Avalanche • V8 4WD Automatic • 162,000 miles

My 2002 chevy avalanche will not blow hot air out.
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Chubbysanchez
December 14, 2010.




With the engine at full operating temp, locate the 2 heater hoses where they go into the firewall and feel them to see if they are both too hot to hold. If they are.

The heat in that vehicle is controlled by a blend door that regulates heated air flow. It is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.

Wrenchtech
Dec 14, 2010.


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