Heater still runs when car is turned off and keys out of ignition

1992 CADILLAC DEVILLE
17,460 MILES
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CHARGERFAN
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  • 1 POST
The heater is still blowing when the car is turned off and keys are out of ignition , what could this be I. Replaced the heater switch and problem still exists.
Dec 13, 2011 at 11:15 PM
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RASMATAZ
  • CERTIFIED EXPERT
  • 75,992 POSTS
Check the blower motor relay could be sticking
Dec 13, 2011 at 11:24 PM
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FACTORYJACK
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  • 4,159 POSTS
Faulty blower power module. Located in the hvac case, on the firewall side of the engine compartment, about center. Has 2 electrical connectors, one two wire, and one four.
Dec 14, 2011 at 4:23 PM
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