Question about 2001 Pontiac Grand Prix

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How do I replace the heater/AC control knob - 2001 Pontiac Grand Prix

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Remove the instrument panel trim plate. Remove the HVAC control mounting screws, and pull the unit out untill you can get to the retainers. Remove the old knob, and install the new one. Reverse the above sequence and reassemble. When reinstalling, make sure that you didn't accidently loosen an electrical or vacuum connection.

Posted on Oct 07, 2009

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1995 Yukon blower and air direction do not work


I had the same problem. Fixed it by changing the climate control knob assembly on the dash. I was able to get a brand new one still in the box on ebay. Cost $150.00 the 1995 will not interchange with any other year even though others look similar the back is different. New they wil run into the $300.00 range. You get all knobs and switches including the push buttons for the AC. These units require a gentle touch easy to break. Good luck.

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Heat blows out at floor only and ac does not come on even though light Indicates it's on. Has rear defrost and light works..Also has recirculating air button . I'm guessing the whole heating control in...


I would first remove the fuse for the heater control head for one minute and then put in and retry.
The control head could have locked up on you with a volt spike. The rear defrost switch does not go through the same circuit in the heat as the hvac controls. Could be a broken know also.
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#76-11-01: HVAC CONTROL KNOB SPINS FREELY (REPLACE) - (Oct 9, 1997) 999999995.gif SUBJECT: HVAC CONTROL KNOB SPINS FREELY (REPLACE ALL THREE KNOBS)
MODELS: 1996-97 CHEVROLET AND GMC M/L AND G VANS 1995-97 CHEVROLET AND GMC C/K TRUCKS
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SOME CUSTOMERS MAY REPORT THAT ONE OR MORE HVAC CONTROL KNOBS SPIN FREELY, RESULTING IN LOSS OF FAN, TEMPERATURE AND/OR MODE OPERATION.
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THE KNOB'S PLASTIC INNER SHAFT MAY CRACK WHEN FORCED AGAINST ITS STOP.
CORRECTION:
IF ANY ONE OF THE THREE HVAC CONTROL KNOBS EXHIBITS THIS CONDITION, REPLACE ALL THREE KNOBS WITH NEW P/N 16268157.
PARTS INFORMATION:
P/N DESCRIPTION QTY 16268157 KNOB, HVAC CONTROL 3

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The sliding switch on the console is stuck in the cold position and the knob is pulled off. Use pliers to jiggle the switch as best you can. Feel under the center console and you probably will find the cable that is hooked up to the flapper. You'll know because when you jiggle the cold/heater switch at the upper console, the cable will move slightly. At the hookup of the cable to the flapper down under the console (passenger side) try to work the flapper loose to the open (or close) position. At the same time work the sliding switch (with pliers). The flapper will come loose and function properly. Try not to knock of the AC button like I did in the process. It flew off some where under the passenger seat. I'll find it sometime before summer. Ha.

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You have one of two possible problems.

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You can save a LOT of money by fixing it yourself.

All that is wrong with the knob are broken wires from the knob's PC board to the main PC board on the AC control.

All you have to do is remove the AC main control, take it apart, and resolder the broken wires from the PC board with the knob on it, to the main AC pc board. There are 3 wires, any number could be broken.

If you take it apart and solder the broken wires, this WILL fix your issue. Just make sure you put the wires back exactly where they go.

A FIXYA rating (4 blue diamonds) would be most appreciated for my assistance.

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