HEATER FAN

  • Tiny
  • Cathy Smythe
  • 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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Sunday, January 2nd, 2011 AT 8:59 PM

4 Replies

  • Tiny
  • JDL
  • Expert
  • 16,289 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
  • Expert
  • 20,244 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

Thank you for your assistance. Cathy

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Sunday, January 2nd, 2011 AT 9:26 PM
  • Tiny
  • Wrenchtech
  • Expert
  • 20,244 posts

Closing out question

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Friday, March 11th, 2011 AT 4:32 PM

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