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Buick LeSabre Heating / Cooling

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

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#1 of 100 Climate Control wrong temp by sturigs_larry Nov 12, 2007 (9:13 am)
My 93 Buick LaSabre thinks the external temperature is 185 degrees. I am just guessing but I think that is the reason I don't get any heat unless I crank the climate control to the highest setting. The ext. temp numbers went up gradually over a one year period.   There was another post that made me think this might be a grounding problem. Has anyone seen this behavior? Does grounding sound like a possibility? Where would I start to look?   Thanks, Larry Replies to this message: imidazol97 (Nov 12, 2007 9:31 am)
#2 of 100 Re: Climate Control wrong temp [sturigs_larry] by imidazol97 Nov 12, 2007 (9:31 am)
Replying to: sturigs_larry (Nov 12, 2007 9:13 am) You can try removing the temperature sensor in front of the radiator. It's attached to the center support for the hood latch. The connection may have corroded slowly over time. It also could be the temperature sensor itself.   I have a 98 service manual but I'll look in the 98 service manual for resistance for that sensor. You might pick up a sensor from a junkyard if that's the problem. I'm betting on the connection.   Since you don't complain that the auto control unit isn't doing other things properly I'd suspect the ground is okay for the power to the unit. I believe it grounds through a buss that's next to the driver's seat right at he bottom of the A pillar. it's under the plastic cover rolled over the door frame. I had problems there and the power doors locks wouldn't work and the AC went into a default with the compressor turned on and in defrost for a manual AC unit.
#3 of 100 I will try that by sturigs_larry Nov 12, 2007 (11:03 am)
I found the sensor and I tried unplugging it and plugging it back in. No change. I'll try leaving it unplugged.   The rest of the climate control stuff seems to work (switches to defrost, panel, etc) except that A/C doesn't blow cold air. I don't know if the system is out of refrigerant or if the compressor never kicks on. Since I live in Michigan I decided I can live without A/C. Unfortunately now the heat doesn't work right! Replies to this message: imidazol97 (Nov 12, 2007 2:18 pm) sturigs_larry (Dec 17, 2007 6:27 pm)
#4 of 100 Re: I will try that [sturigs_larry] by imidazol97 Nov 12, 2007 (2:18 pm)
Replying to: sturigs_larry (Nov 12, 2007 11:03 am) The temperature sensor should be about 1000 ohms at 70 F and about 3000 at 30 F. You need to take off your hush panel under the passenger side and look at the link move the arm for the temperature control back and forth. The link is from the bottom of the programmer box that controls all these changes. There's a white nylon arm that snaps onto a threaded rod that goes into the heater box and pulls on he vane to change the air flow over the heater and modulate the temperature.   I assume both hoses to your heater core are hot meaning it's not clogged up. Replies to this message: sturigs_larry (Dec 17, 2007 6:27 pm)
#5 of 100 Heater Problems by joshlin1932 Dec 17, 2007 (1:15 pm)
It seems that my heater control valve is malfunctioning. The control cable may be disconnected, but I cannot find how to get into it. Can you please help me?   Thanks, John
#6 of 100 Re: I will try that [imidazol97] by sturigs_larry Dec 17, 2007 (6:27 pm)
Replying to: imidazol97 (Nov 12, 2007 2:18 pm) Thank you for all the help. I replaced the temperature sensor and everything started working. $24.50 and I am back in business. Thanks again.
#7 of 100 new owner please help by beast76 Feb 22, 2008 (6:57 pm)
I recently aquired a 97 buick lesabre limited and it had the passinger side climate contol removed. When I replaced the part it would not light up or do anything. The stange part is that the blower motor for the main a/c stopped working. ANY help would be greatly appreciated.
#9 of 100 1999 LeSabre Climate Control by drmrmn Apr 24, 2008 (6:32 am)
Hi, I just purchased this car used and discovered the drivers side climate control works fine but the two dash vents on passenger side blow hot air when AC is on. Any ideas? Thanks, Alan Replies to this message: imidazol97 (May 01, 2008 3:11 pm)
#10 of 100 Re: 1999 LeSabre Climate Control [drmrmn] by imidazol97 May 01, 2008 (3:11 pm)
Replying to: drmrmn (Apr 24, 2008 6:32 am) Are you able to work on your own car? Such as under the passenger side?   I'll bet if you take off the hush panel above the passenger's toes and take off the glovebox and watch the two levers move while you change the controls, you will find the lower one that changes the temperature for both works and moves.   If you watch the smaller white, upper arm when you adjust the passenger side, you'll see no movement or erratic movement. You might try moving it to see if the door inside of the heater box is sticking. But most likely the little electric motor in the actuator that moves the white arm is broken or disconnected...

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