Question about 1986 Buick Regal

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Have a 1986 Buick regal limited. I lost reverse, shortly after my heat started blowing cold air, I noticed that a damper door located under the passenger side at bottom of windshield, also behind glove box wasn't opening could these two be related? Both heat and transmission are ran off vacuum. Also I have a charging problem I have a new battery, altenator and body ground to battery....idk? Any help???

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  • Buick Master
  • 14,585 Answers

No there not related. The vacuum modulator on the trans is for forward gears. Smooth shifting. When it is bad, you get hard shifts between 1st to 2nd and so on. Reverse is not hard to fix, but you have to pull the transmission. Most likely a split ring broke. The blend door problem is because of a broken vacuum line. They usually break around the engine (heat) and you can fix them with a piece of rubber hose. If you don't see the break, then run a new hose from the engine to the controller. But check for vacuum at the controller first. If you have vacuum there, then check for vacuum at the actuator. No vacuum at the actuator, replace the controller. Vacuum at the actuator, replace the actuator..

Posted on Dec 03, 2014

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  • 6 Answers

On the charging problem take it to almost any parts store and they will check out your charging system for free

Posted on Dec 03, 2014

  • edster10 Dec 03, 2014

    on the charging problem take it to almost any parts store and they will check out your charging system for free

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SOURCE: 1998 buick park avenue drivers side blows cold, passenger side hot

sounds like the drivers temp door actuator is not working should be located on the drivers side of the air box down by the gas pedal or center dash area.

Posted on Nov 06, 2008

  • 1 Answer

SOURCE: 99 Buick Regal LS dual climate control. No heat passenger side.

the motor for the passenger side
blend door is shot

Posted on Jan 12, 2010

  • 92 Answers

SOURCE: a/c blows hot air on drivers sde

The actuator door on the driver's side is out of position and needs to be reset. Remove the negative battery cable for 1/2 hour to reset the computer. Start the HVAC system and you should be able to hear the door adjusting itself and cold should come out of the driver's side vent.

Posted on Jan 27, 2010

  • 1 Answer

SOURCE: where is fuse for drivers side heated seat on 2006 Buick Terraza

i have a 2005 terraza and the fuse panel is at the end of the dash board on the passengers side .there is a finger slot in a plastic cover,pull to remove. fuse panel is behind .i had to call a service tech to find mine. good luck pete.

Posted on Jul 26, 2010

johnjohn2
  • 5763 Answers

SOURCE: 2005 pontiac vibe just started making like &

you have a bad actuator motor or a broken blend door in the heater box, the noise you hear is the skipping of the gears in the actuator motor, the ehating system along with ac use motors to move doors inside the heater box, the doors control the flow of the air and the temp, you will need to locate the bad one by unplugging one at a time, when noise stops you have the right one, remove it by removing screws that hold it to box. with motor removed look at the hole that controls the door, you will see a small square that the motor turns ,this id part of the door hinge, you should be able to turn side to side, this swings door left and right like a rood door, open or closed, if the door swings good then the actuator is bad, let me get a picture to help you located it, you will located the heater box in the location of the noise, behind glove box, try to acess from the bottom of the dash and also remove glovebox,hope this helps, good dayjohnjohn2_96.jpg

Posted on Apr 13, 2011

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