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AC/ Heater control

Tiny
PTBLAZAK
  • MEMBER
  • 2001 CHEVROLET S-10
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 115,000 MILES
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
Monday, December 27th, 2010 AT 12:24 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,645 POSTS
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.
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Saturday, February 19th, 2011 AT 10:14 PM

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