1992 Buick Lesabre Heater stays on constantly

1992 BUICK LESABRE
150,000 MILES • 6 CYL • FWD • AUTOMATIC
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POWERSLAVE75
  • MEMBER
  • 2 POSTS
Ok Guy's I hope you can figure this 1 out. The heater stays on constantly and will not shut off except when you turn car off. Stays on auto fan can not switch speeds, temp, or to A/C. It is dual climate control and the passenger side controls do not work either. You can push all control buttons, they will make a beeping sound when pushed but thats it. I have chacked all fuses and relays and still cant figure it out.
Mar 10, 2008 at 8:39 AM
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SERVICE WRITER
  • ✓Experienced Mechanic
  • 9,123 POSTS
Check codes using this format. What did you get?


https://images.2carpros.com/forum/automotive_pictures/30961_builes_1.jpg

Sounds like the heater control unit is bad bu the sounds...but...
Mar 10, 2008 at 11:20 AM
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POWERSLAVE75
  • MEMBER
  • 2 POSTS
Thank you very much for the help but it did not work. You said the Heater Control Unit might be bad by the sound of it. How would i go about changing that part out and is it a dealer part or can I get that at a parts store?
Mar 10, 2008 at 12:38 PM
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