Mechanics

HEATER FAN

2004 Chevrolet Avalanche • V8 AWD Automatic • 48,000 miles

Heater fan running after engine turned off and runs down battery. What causing fan to stay on?
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Cathy Smythe
January 2, 2011.




Where applicable, change the blower relay/resistor assembly for manual hvac system.

JDL
Jan 2, 2011.
I assume you have Automatic Temp Control system. The problem is likely a bad Blower Speed Control Module. If it's not ATC, then the resister that takes it's place is bad.

Wrenchtech
Jan 2, 2011.
Thank you for your assistance. Cathy

Tiny
Cathy Smythe
Jan 2, 2011.
Closing out question
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Wrenchtech
Mar 11, 2011.

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