When I turn the knob the heater blower wont turn on.
Heater relay swicth on 1990 Acura Integra
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
check the fuse
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?