Why is my heater not responding to controls, and staying on when the truck is off?

2006 GMC SIERRA
70,000 MILES
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FORESTWORKER
  • MEMBER
  • 1 POST
I first noticed the blower motor (?) staying on when the truck is turned off, even if I turn off the heater before turning off the truck. This has started to kill the battery. Also, the blower is not turning up when the fan controll is turned up. Is this an easy fix, or a shop issue?
Nov 2, 2011 at 2:42 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
No its not-Check the blower motor relay/blower motor control module-could be sticking, also the blower switch
Nov 2, 2011 at 3:18 PM
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