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1998 Chevy Blazer Heat always on

Tiny
PVERN
  • MEMBER
  • 1998 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 134,000 MILES
With all ac/heat controls and fan on off, temp select on coolest, heat still emits from vents. Adding fan just adds full heat, even with temp control on coolest. This happened without warning, so I suspect a single part malfunction. Any suggestion as to what to replace? Thanks
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Monday, February 25th, 2008 AT 11:34 AM

1 Reply

Tiny
DENNYP
  • MECHANIC
  • 1,823 POSTS
This is a normal condition for a blazer. It has done this all along and you probably just have not noticed it. If it is stuck on heat when the fan is on and the temp is set on cold, then you probably have a bad temp actuator.
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Tuesday, February 26th, 2008 AT 3:08 PM

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