Car Heater Fan Switch Not Working

Rotated all the unmarked relays around in the junction box.

Car heater fan switch not working.

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. Checked for battery at the blower when the car is running. A blown fuse might just be the reason your car heater fan is not working. 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.

Blower still does not work. Rotated all the pdc relays around they have the same id other than abs pump. So it s advisable that you get the switch checked too. Blower still does not work.

Checked continuity of 40 amp blower fuse. Follow the wiring harness as carefully as possible between these two locations looking for burned out spots or breaks in the wire. 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.

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. The system is very simple and rarely goes wrong. Check for blown fuses and replace them to restore normal functionality.