HEATING SYSTEM

2002 Chevrolet Avalanche

Tiny

chubbysanchez

December, 14, 2010 AT 12:02 AM

My 2002 chevy avalanche will not blow hot air out.

FOUND 4702 RELATED QUESTIONS

Heater

17 ANSWERS
11 IMAGES

1 Answer

Tiny

Wrenchtech

December, 14, 2010 AT 6:56 PM

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.

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