Question about 1993 Buick LeSabre

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I have a 93 lesabre. The air and heat controller has a mind of it's own. When a light is lit on the controller you have control of the functions. When no light is lit all you have control of is the temperature slide. I have replaced the controller and the new one (used)does the same thing. Does the air/heat have it's own computer and if it does...where is it located? thanks, Captain Jim

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  • Buick Master
  • 1,522 Answers

Hey Cap'n, all the heat and A/C is actuated by the controls and these controls are ALL vacuum actuated. Make sure you have vacuum to the controls from the engine. There's a 4 inch round ball under the hood on the pass side near firewall. This ball is the vacuum reservoir, must have vacuum to and from then thru the firewall to said controls. If there's vacuum everywhere, it HAS to work properly. Check all vacuum lines for leaks, cracks, connections, all the above.

Posted on Jul 20, 2017

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6ya6ya
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Posted on Jan 02, 2017

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keemo68
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SOURCE: 2002 Buick Lesabre Alternator Fan Switch and Control

there is no such thing and who ever told you that one exists is full of baloney.. please rate this

Posted on Sep 06, 2008

emissionwiz
  • 80637 Answers

SOURCE: n423y@att.net

yes it is called the blend door, you either have a sticking blend door or the actuator motor for the door is defective and does not completely shut off the heater core. The pass side has it's own blend door.

Posted on Feb 09, 2009

emissionwiz
  • 80637 Answers

SOURCE: 93 Buick LeSabre with nonresponsive climate control buttons

this system has self testing capabilities, have any GM dealer test it for codes and proper function, If I had to guess I would say the climate control head is defective.

Posted on Apr 30, 2009

  • 369 Answers

SOURCE: 2000 Buick LeSabre No heat, blows cold air.

check to see if both hoses are hot going to your heater core if they are then core is fine.That would point to your temperature sensor.

Posted on Feb 07, 2010

  • 973 Answers

SOURCE: control panel buttons, ie heat, ac etc. have a

Your A/C Heater Control needs to be replaced.

Posted on Jun 24, 2010

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