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Buick LeSabre Heating / Cooling

100 messages,  Last post on Nov 12, 2009 at 7:48 PM

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#96 of 100 Re: 97 LeSabre passenger heat problem [dan_1997] by imidazol97 Oct 09, 2009 (3:55 pm)
Replying to: dan_1997 (Oct 09, 2009 2:49 pm) The electric actuator on top may have a cracked gear inside. This allows slippage and the programmer (box on the corner of the heater, the computer) loses it's reference. Moving to cold and then back up lets the actuator reset a reference and move again.   You can watch the link for movement while you move the heater control temp on passenger side up and down (with key ON). Actuator has wire connecting to programmer. It has two little screws on top that are barely accessible.   link title   link title
#97 of 100 Lesabre Heat Problem by dm26 Oct 22, 2009 (6:54 pm)
I have an 00 Lesabre with no heat. It has the manual slide system, not dual control. The thermostat is ok, blower works fine and directs to the correct vents when setting is changed. The A\C works. I tried another dash control unit, same issue. Is there a valve or vent door that is not opening? If so is it electrical or vacuum? Is there a way to test? Replies to this message: imidazol97 (Nov 12, 2009 7:48 pm)
#98 of 100 Heater by pcjd388 Nov 12, 2009 (6:43 pm)
I have a 97 lasabre that when you have the heat on the floor setting, it will blow out hot air on drivers side floor vents, but will blow out cool to cold air for the passenger side floor vents, what could be the problem making it do this? Any help would be appreciated The same goes when you have the mid level vents on as well Replies to this message: imidazol97 (Nov 12, 2009 7:47 pm)
#99 of 100 Re: Heater [pcjd388] by imidazol97 Nov 12, 2009 (7:47 pm)
Replying to: pcjd388 (Nov 12, 2009 6:43 pm) You have two electrical actuators--if you have digital readout with a passenger control AC system.   One controls the driver's side temp One controls the passenger side temp   Take off the hush panel above the passenger's legs. On the bottom of the heater box is a white lever that comes out of programmer box. It snaps onto a small rod that has ridges on it like screw threads. it may be unsnapped. Or the motor for the plastic link is not working.   The actuator on top of the heater box close to the top of the programmer also actuates a vane inside the heater through a small rod. Check to see if one of these work when you operate the temp control for driver (main) and then check to see if the other work move when the passenger control is varied. Be sure to have the key ON when trying this.   The actuators may have cracked a gear inside the box. The actuator for the lower one is inside the programmer box which has all the vacuum tubes coming out of it. I assume it requires replacing the programmer.   I forget which one, top or bottom, controls which temp.   You may want to take off the glovebox lid by removing 6 screws along the bottom. I think that makes it a lot easier to see. And I think the lower lever is kind of protected by a snap on shield.
#100 of 100 Re: Lesabre Heat Problem [dm26] by imidazol97 Nov 12, 2009 (7:48 pm)
Replying to: dm26 (Oct 22, 2009 6:54 pm) There are electric motors that move the vanes inside the heater box.   For most if I understand poster's comments, the axles are white and you can see them move in response to different commands from the controls with the key ON. Take off the hush panels under the dash to see the controls. You may need to look on driver and passenger side both.

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