heater fan

2004 CHEVROLET AVALANCHE
48,000 MILES • V8 • AWD • AUTOMATIC
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CATHY SMYTHE
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heater fan running after engine turned off and runs down battery. What causing fan to stay on?
Jan 2, 2011 at 8:59 PM
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JDL
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Where applicable, change the blower relay/resistor assembly for manual hvac system.
Jan 2, 2011 at 9:17 PM
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WRENCHTECH
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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.
Jan 2, 2011 at 9:19 PM
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CATHY SMYTHE
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Thank you for your assistance....Cathy
Jan 2, 2011 at 9:26 PM
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WRENCHTECH
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Closing out question
Mar 11, 2011 at 4:32 PM
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