1999 Chevrolet S-10 Heat and Air

Tiny
RF1661
  • MEMBER
  • 1999 CHEVROLET S-10
  • 4.3L
  • V6
  • 2WD
  • AUTOMATIC
  • 195,000 MILES
My heater quit blowing hot air and my ac quit blowing cold air. I checked all fuses and no bad ones. I check all fuses and relays on drivers side under the hood. I changed the control panel inside the cab in the dash. When I turn ac on the compressor does not kick in but it has the right amount of Freon pressure. It just blows warm air. When I switch to heat it blows cold air. What is the problem?
Friday, October 10th, 2014 AT 2:33 PM

4 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Have you checked the blend air door?
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Thursday, October 16th, 2014 AT 7:30 PM
Tiny
RF1661
  • MEMBER
  • 4 POSTS
No I have not. Where is it located? Is it powered by electric or vacuum?
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Friday, October 17th, 2014 AT 10:26 AM
Tiny
RF1661
  • MEMBER
  • 4 POSTS
Will this cause the ac compressor not to kick in?
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Friday, October 17th, 2014 AT 10:27 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
I believe this is an electrically controlled one. It is located near the hear core box and not fun to get to. As far as the AC, this shouldn't cause the issue. However, once we get the heat to work all the time, then we can move to the AC. It could be a cycle switch, clutch, power supply issue.
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Friday, October 17th, 2014 AT 5:29 PM

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