My heat only works when the selector is on "3". 1 and 2 do not blow anything. Looks like an electrical problem with the speed selector module (whatever it is called)? I have a spare one in my parts car but cannot figure how to disconnect the wires.

This has been covered numerous times. try the search function.

 

Top right of your screen.

 

 

Jay

It's not your speed selector - it's the resistor block. Grab one from a JY that isn't burned out.

 

GD

Got it. I have one in a parts car.

 

Here is the super long thread on that matter

 

 

 

To check and or replace the resistor block- look under the glove box toward the fire wall and up The resistors sit in the air stream of the heater duct and the unit is held with three screws Two of which are obvious the third is one one of the motor mount screws. The wire colors are blue, blue/blk, blue/yel and blue/white. Last time I checked the dealer wanted about 60 bucks for a new one.

 

The blower switches themselves do go bad but it is more likely the resistor block.