I have been having a couple of problems with my AC/HEAT control module. My Fan setting for 1, and 2 do not work and recently my rear defroster doesn't work ether. Does anyone know what I will have to do to fix these problems?

 

what year?

 

Its a 1997 with the 3.1 liter V6.

 

mine is doing the same thing. the a/c and heat only work when the dial in on 3 and up..

 

Its strange that its donig this. I actully read alot about other people having the same problem but know one has a fix for the problem, its very odd i think.

 

It's not strange at all ... fairly common problem ...the fix for the fan only working on high speed is the voltage divider circuit ( resistor coils ).

For the rear defroster check the fuse first if that's OK then use a multimeter to check for voltage at the back window contacts , also with your multimeter check the filament grid for continuity.

 

This might sound stupid but where is the resistor coils and how would I go fixing it.

 

Have you removed your A/C control module and pulled the back cover off your fan speed control switch to see if the contacts are dirty?

 

Actually MalibuRich, I haven't even looked at it. My AC doesn't work so I haven't used the control since winter for the heat. I have found a How-To on this one a Malibu forum. I will be replacing the resistor sometime this fall. I will check the contact before I purchase a new resistor and see if that is the problem. Thank you.