When I turn the knob the heater blower wont turn on.
Heater relay swicth on 1990 Acura Integra
I have the same problem, but mine was on and suddenly stopped working couldn't get it to work on any settings either..... any suggestions?
check the fuse
Also check power to the blower motor, this may be a bad motor or power supply to the motor. If you need someone to look at it for you, call a shop near you: http://repairpal.com/directory?address=08330&car_brand_names=Acura