AC/ Heater control

2001 CHEVROLET S-10
115,000 MILES • 4 CYL • 2WD • AUTOMATIC
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PTBLAZAK
  • MEMBER
  • 1 POST
The ac/heater control (selector) stopped working. The fan speed and temp controls work. I tried a new control and it did not solve the problem. I think I have a vacuum problem. How do I troubleshoot this
Dec 27, 2010 at 12:24 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Chances are it is a vacuum leak issue. What I suggest is to check under the dash for leaks. With the engine running, you may hear a hissing noise from where the leak is. You may need to follow the supply hose to the engine to check it too.
Feb 19, 2011 at 10:14 PM
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