Question about 1991 Buick LeSabre
You going to have to tear the dash apart (ac control panel) to see why your switch is not working. The control valve unit works on vacum systems and you need to find out where is leaking or the hoses is old and broke off. If your ac compessor still working and blowing cold air but does not adjust the temperature, it will be in the control valve. Is very easy to fix if you locate the leaks or a bad valves. hope that help some.
Posted on Aug 02, 2009
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Posted on Jan 02, 2017
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