Car Heater Fan Switch Not Working

The motor is usually earthed to the body by a separate wire. Check for blown fuses and replace them to restore normal functionality. Follow the wiring harness as carefully as possible between these two locations looking for burned out spots or breaks in the wire.

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Rotated all the pdc relays around they have the same id other than abs pump.

Car heater fan switch not working.

Rotated all the unmarked relays around in the junction box. Blower still does not work. So it s advisable that you get the switch checked too. 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.

Checked continuity of 40 amp blower fuse. Blower still does not work. A problem with the switch which turns the fan on or off might also be the source of the problem. The system is very simple and rarely goes wrong.

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. Checked for battery at the blower when the car is running. The only fault that is likely to develop is that the fan stops working because of a break in the electrical circuit. This symptom reveals the aging weaknesses in the resistor that usually makes all the magic happen.

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. A blown fuse might just be the reason your car heater fan is not working.

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