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A/C temp knob doesn't want to turn. Vac prob?

  • Thread starter Thread starter Zero Signal
  • Start date Start date Sep 4, 2004

Zero Signal

Active Member
Feb 24, 2003
2,633
2
46
Tucson, AZ
Sep 4, 2004
#1
  • Sep 4, 2004
  • #1
My girlfriend is buying a 93 GT. We noticed that the A/C temp control knob doesn't want to stay on cold. It can be forced all the way counter-clockwise, but it won't stay there. The system seems like it wants to blow cold but it won't becuase the knob won't go all the way cold but it will blow kinda cool consistently.

Has anyone had this problem? Could it be a vacuum problem? When we pick it up, where should I look for vacuum line problems?

If I take out the A/C control panel, should the knob turn just fine if it isn't the control itself messed up?

Do the fox a/c controls click like sorta when you turn them like the sn-95's? When I turn the one on the 93, it's just smooth.

One last thing, the heater core in this car has been replaced in the past year, so I was wondering if it might have something to do with it.
 

The Shape

Founding Member
Jan 11, 2002
2,224
8
49
East ARKANSAS Delta
Sep 4, 2004
#2
  • Sep 4, 2004
  • #2
The control knob that turns from A/C to heat is connected to a cable. Most likely the cable is binding up for some reason. If you pull the panel off you will probably be able to see the problem.
 

Blakthorn

Member
Jul 24, 2004
299
1
16
US
Sep 4, 2004
#3
  • Sep 4, 2004
  • #3
I have an AC problem as well, i turn it on and it only comes on out of the top vents by the windshield and not the actual vents on the dash - am i missing something here or what can be causing this?
 

The Shape

Founding Member
Jan 11, 2002
2,224
8
49
East ARKANSAS Delta
Sep 4, 2004
#4
  • Sep 4, 2004
  • #4
Blakthorn that problem is vaccum related. If you also pull your HVAC control panel and trace all of the vaccum lines I bet you will find one is either disconnected or broken.
 
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