Question about 1999 Buick Regal

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1999 Buick Regal temp problems

The problem is that hot air comes from the vents on one side of the car & cold air is coming from the vents on the other side. What could be causing this & how can it be fixed? Someone suggested there is a flap that shuts off the heat & this flap might be stuck...??
I welcome any support you can lend. Thanks, Sherry

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  • Anonymous Jun 28, 2008

    Same problem on 99 regal LS. I replaced the control panel with a rebuilt one. The display was out. Everything works properly now except Warm air on drivers side and cool on passenger side. What is the correct fix and does the dash have to come out? I am a little better than average at repairs. Can I do this or should it go to dealer?

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  • Buick Master
  • 2,039 Answers

Warm air come out on the passager side you got dual heating control the motor that control the hot and cold is stuck that hapen when the car sit there a long time or the setting dont move if it passager side under the dash you got the heater box about 3/4 down you got a square electric motor start the car gently tap the motor with anything you got most of the time it gonna start moving play with the heater control to see it move good luck pierre

Posted on Jun 24, 2008

On '99 buick there is a problem with the head unit that causes it to loose the limits of the doors. The result is a malfunction that usually causes one side cold the other hot. The fix is to replace head unit with MY2000 head unit. It worked for me anyway.

Posted on Jul 22, 2008

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