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Heater fan

Tiny
CATHY SMYTHE
  • MEMBER
  • 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?
Sunday, January 2nd, 2011 AT 8:59 PM

4 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Where applicable, change the blower relay/resistor assembly for manual hvac system.
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Sunday, January 2nd, 2011 AT 9:17 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
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.
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Sunday, January 2nd, 2011 AT 9:19 PM
Tiny
CATHY SMYTHE
  • MEMBER
  • 2 POSTS
Thank you for your assistance. Cathy
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Sunday, January 2nd, 2011 AT 9:26 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Closing out question
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Friday, March 11th, 2011 AT 4:32 PM

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