on the passenger side ITS bolted 2 the firewall - behind the dash board.
By the evaporator case. Under the dash, behind a kick panel that is below the glove compartment.
The 1999 Oldsmobile Intrigue evaporator case can be found at the bottom of the engine compartment. You can follow the evaporator hose from the air conditioning compressor directly to the evaporator case.
The evaporator is enclosed in the vehicle air box which is part of the HVAC system. The HVAC system must be removed from the car to access the evaporator. This is a seriously difficult job for the novice and requires almost the complete removal of the dashboard and console plus disconnection of lines on the engine side of the firewall. The GM Service manual does not go into full detail regarding removal of the HVAC unit so you should find someone who can assist.
Buick regal doesn't have a timing belt. It has an accesory belt and is change between 50,000 to 60,000. In my case i replace the accesory belt when my car was 80,000 milles.
You probbably have controler problems but the resistor is on the evaporator case.
On the evaporator case.
Buy a new one and you will see what it looks like and it is mounted on the evaporator case.
The reset button next to the fuse box in a 1999 Buick Regal LS is typically the reset for the fuel pump or the inertia switch, which is designed to cut off fuel supply in case of an accident. This button can be pressed to restore fuel flow after an impact or if the vehicle fails to start. If the button has been tripped, it may need to be reset to allow the engine to start again. Always consult the owner's manual for specific details related to your vehicle.
If it's for the front evaporator the box is underneath the dash board. You have to completely remove the dashboard in order to remove the evaporator case on a 1996 Town & Country.
inside evaporator case
Hey George==The switch probably is ok Check out the resistor pack on the evaporator case. GoodluckJoe
Get a test light and find out where the power is not coming through. Check the fuse, relay and resistor pack located on the evaporator case.