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

Tiny
CHARGERFAN
  • MEMBER
  • 1992 CADILLAC DEVILLE
  • 17,460 MILES
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.
Tuesday, December 13th, 2011 AT 11:15 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the blower motor relay could be sticking
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Tuesday, December 13th, 2011 AT 11:24 PM
Tiny
FACTORYJACK
  • MECHANIC
  • 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.
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Wednesday, December 14th, 2011 AT 4:23 PM

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