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
  • 1,147 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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Posted on Jan 02, 2017

keemo68
  • 1263 Answers

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
  • 75822 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
  • 75822 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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How do i bim and brighten dash light 2002 buick lesabre


bim or DIM ? the dimmer switch ! Interior Lamps
The interior lamps consists of two groups, lamps that can not be dimmed and lamps that can be dimmed. This first group consists of lamps that may not be dimmed. This includes those lamps that may be manually turned on by placing the interior lamp switch to the DOME position, or by opening a door or a compartment:
• Door courtesy lamps
• Footwell courtesy lamps
• Instrument panel (I/P) compartment lamp
• Overhead console courtesy lamps
• Reading courtesy lamps
• Rear compartment courtesy lamp
• Roof rail courtesy lamps
• Sunshade vanity mirror lamps

Interior Lamps Dimming
This group of interior lighting includes lamps which may be dimmed. This group uses a combination of class 2 controlled illumination and incandescent lamps:
• Air temperature switch
• Cigar lighter lamp
• Door switches
• Driver information center (DIC) switch
• Headlamp switch
• Head-up display (HUD) switch
• Heated seat switches
• HVAC control assembly
• Instrument panel cluster (IPC)
• Memory function switch
• Radio
• Steering wheel controls
• Window switches
For the interior lighting to be dimmed the following conditions must be met:
• A low light level has been detected by the dash integration module (DIM)
• Headlamp switch is placed in to the PARK or HEAD position
• Ignition switch is placed in the ON position
Then all class 2 displays and all incandescent back lighting will be illuminated to the level set by the instrument panel (I/P) dimmer switch. When the I/P dimmer switch is moved from MIN to MAX, all class 2 displays and all incandescent back lighting respond from minimum intensity to maximum brightness.
The DIM supplies battery positive voltage to the coil side of the PRK LP relay in the rear fuse block.
When the I/P dimmer switch is moved from MIN to MAX, then the instrument panel module (IPM), W/CJ2, or climate control panel (CCP), W/C67, applies a message to the class 2 communication circuit to the DIM. The DIM then applies a ground to the park lamp relay control circuit. This energizes the PRK LAMP relay and allows battery positive voltage to be applied through the DIMR fuse to the DIM. The DIM then illuminates the following incandescent lamps through the incandescent dimming output circuit:
• Cigar lighter lamp
• DIC Switch
• Headlamp switch
• HUD switch
• HVAC control assembly
• IPC
• Radio
• Steering wheel controls
The DIM also applies a message to the following class 2 controlled illumination components:
• Drivers door module (DDM)
• HVAC control assembly
• IPC
• Radio
The DDM will then send a message through the simple bus interface (SBI) to the RH front door module (RFDM). The door modules will then illuminate the following components through the incandescent dimming output circuit:
• Air temperature switch
• Heated seat switches (W/KA1)
• Memory function switch (W/A45)
• Power door lock switches
• Power window switches
The ground for these components are provided from the DDM and RFDM.
The following components are grounded at G200:
• Headlamp switch
• HVAC control assembly
• IPC
• Radio
• Steering wheel controls
The following components are grounded at G201:
• Cigar lighter lamp
• DIC Switch
• HUD switch

Mar 13, 2017 | 2002 Buick LeSabre

1 Answer

Heat problem inside car/and hi idle when first starting car 1997 Buick Lesabre


vacuum hose to vent door could be off or busted, problem in climate control. replace idle air control valve to bring in down

Feb 01, 2015 | 1997 Buick LeSabre

1 Answer

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.

Feb 07, 2010 | 2000 Buick LeSabre

1 Answer

2500 to 3000 rpm idle


Change your Thottle positioning Sensor. My 93 lesabre did the same thing and i changed the TPS and it stopped.

Jun 11, 2009 | 1993 Buick LeSabre

1 Answer

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.

Apr 30, 2009 | 1992 Buick Park Avenue

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