Can anyone explain how the AC/Heater fan operates? Is the fan speed controlled through a resistor block, or is PWM used? If PWM is used where, (on AC cluster or elsewhere)is the controller located ? Also, is the AC temperature control, controlled through a pot, as it seems fairly analog? I am interested in using the blower switch and AC temp control for a project but need to know the operating
logic.

Thanks,
Pat

 

Check your PM!