Insert a flat bladed tool into the top service notch in order to disengage the locking clip 2 located at the front of the manual lock knob 1.
Remove door panel 01 deville.
Feel free to contact me with any questions.
Here is how to remove the front door panel on your deville.
Use a flat screwdriver to pop the panel off.
It has nothing to do with the heat.
Ensure the manual lock knob 1 is in the unlock position.
Look for all external screws you see.
Remove the phillips screw from behind the panel.
Pull the interior door handle open so you can reach the small square panel behind it.
Position the window fully downward.
2000 2001 deville door panel removal.
Open hood look in main fuse box for blown fuses or bad relays to heater fans.
Remove manual lock knob.
Position window fully downward and ensure manual lock knob is in unlock position.
Otherwise the problem is in the heater control module where you turn on a c and the heat that panel has a.
Disconnect locking clip at front of manual lock knob by insertingsuitable flat bladed tool into top service notch.
The a c fan should come on only when you turn a c on at the dash panel only.