The climate control on my 92 PA was not working properly. I found that the vacuum line going through the fire wall had got disconnected. Connecting that solved my problems.
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A repair manual for the 1998 Buick Park Avenue would have a brakes repair diagram. A popular book is the Haynes Repair Manual.
were heater control valve for 1996 buick park avenue
possibly when the a/c is not needed to cool the air temperature you set. The A/C control module has failed, as revealed on a diagnostics check.
Pull the bulb...
The Buick Park Avenue Started In 1991
Where can I locate the "Lamp Control Module" on a 1994 Buick Park Avenue
It usually means that you have a stored trouble code in the HVAC system. You have to retrieve the code and then diagnose it accordingly.
Chilton's Automotive Repair Manuals are a good source to find fuse box diagrams for the 1986 Buick Park Avenue. This repair manual can be purchased for around $25 or less.
No air flow? Check for vacuum leak either under dash or at engine compartment Maybe bad vacuum diaphragm under dash Maybe bad selector control
21.08–21.23 mm
you could try www.autozone.com if not there try getting the haynes repair manual for your vehicle.(handy book to have)