Car Heater Fan Switch Not Working

Blower still does not work.

Car heater fan switch not working.

This symptom reveals the aging weaknesses in the resistor that usually makes all the magic happen. 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. There is no battery to operate the blower. Checked continuity of 40 amp blower fuse.

Rotated all the pdc relays around they have the same id other than abs pump. 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. The only fault that is likely to develop is that the fan stops working because of a break in the electrical circuit. The system is very simple and rarely goes wrong.

A problem with the switch which turns the fan on or off might also be the source of the problem. The motor is usually earthed to the body by a separate wire. 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. Check for blown fuses and replace them to restore normal functionality.

So it s advisable that you get the switch checked too. Blower still does not work. A blown fuse might just be the reason your car heater fan is not working.