Heater Control Problem

GMC
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DJSCHWENKE
  • MEMBER
  • 1 POST
I have a problem with the heater control on my 1998 Chevy Malibu, 110K miles.
The air source always defaults to "outside" air no matter what blower position I choose (lower or defrost).
Might a switch be bad? Where is it located?
May 12, 2006 at 9:09 PM
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LOSONE
  • ✓ASE Certified Mechanic
  • 1,616 POSTS
  • ASE Certified Mechanic
Look under the hood for the round black vacuum tank about the isze of a softball.. Check the vacuum lines going in and out. Quite often the small plastic lines break and cause your problem
May 13, 2006 at 1:55 PM
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