2002 Chevy Silverado Blower fan only runs on high and won't

2002 CHEVROLET SILVERADO
230,000 MILES • 6 CYL • 2WD • MANUAL
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ADAMWACHTEL23
  • MEMBER
  • 1 POST
My heater only runs on high even when i have it shut off. It also continues to run after turning off the ignition and the battery must be dissconnected to turn it off. What could this be?
Feb 25, 2010 at 8:08 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
The blower motor relay will do that if its sticking closed
Feb 25, 2010 at 8:12 AM
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