Car Heater Fan Switch Not Working

Blower still does not work.

Car heater fan switch not working.

Checked for battery at the blower when the car is running. Checked continuity of 40 amp blower fuse. A blown fuse might just be the reason your car heater fan is not working. So it s advisable that you get the switch checked too.

There is no battery to operate the blower. If any of these not so great for your car tricks gets your heater back to proper function this is a big indication that it s your heater switch that s on the fritz and causing your current cabin temp woes. Rotated all the unmarked relays around in the junction box. The motor is usually earthed to the body by a separate wire.

A problem with the switch which turns the fan on or off might also be the source of the problem. Blower still does not work. Follow the wiring harness as carefully as possible between these two locations looking for burned out spots or breaks in the wire. This symptom reveals the aging weaknesses in the resistor that usually makes all the magic happen.

Rotated all the pdc relays around they have the same id other than abs pump. Look for a break in the wiring between the switch and the fan if the meter shows voltage or the light illuminates and you have tested the switch and motor. This circuit consists of a feed wire from the fusebox to the on off switch on the dashboard or centre console and another wire from the switch to the heater motor.