So the IPM ( PTC #1 ) where exactly is it?? Can it be reset or changed??

[PWong]

A/C Control Head was the official name from the service manual and wiring diagrams.
You call it switch panel or control panel.
What did you mean by heater switch???
Did you mean the temp control knob???

 

[PWong]

What did you mean by heater switch???
Did you mean the temp control knob???

Or you meant the heater switch for the heated mirror???