Air will only blow at 4!! whats wrong?

[johnnybmw1]

what is wrong with my air/heat system?? does anyone have any ideas??
it wont work at 1, 2 or 3... it will only blow air at number 4
which is pretty odd... does anyone have a darn clue??

how to fix it??


thanks!

 

[selavia]

A friend had exact problem on his Mercury Cougar. He ended up having to replace the switch and the wiring harness.

 

[Big Daddy]

Blower motor resistor? Here is the e30 fix, hope it will work for you. e30 Network

 

[E30m42cab]

That's what I always hear about only working on 4... the resistor.

 

[johnnybmw1]

i will try to replace the resistor... ill bring back the news thanks guys