Blower Fan Not Working In Car

Checked for battery at the blower when the car is running.

Fan noise from laptop. The heated air circulated through vents into car interiors is directed by the heater fan. The resistor limits electrical current so that the blower operates at the correct speed. Bring broad knowledge of electricity and specific knowledge of the use of electrical testing equipment.

A wiring diagram for the specific vehicle is also helpful. Without blower motor the heater fan in the car air conditioning system will not work. Blower still does not work.

Observe safety precautions while working with. Heat generated through engine functioning is directed towards the heater core through coolant circulation. A bit of background on the working of car heater fans will be helpful in diagnosing the source of the problem.

If your cars blower has only 4 or 5 different speed settings it likely uses a simple electric resistor to control the fans speed. To determine the cause of a blower fan failure isolate the motor and perform some basic electrical tests. Rotated all the unmarked relays around in the junction box.

There is no battery to operate the blower. About car heater fans. Checked continuity of 40 amp blower fuse.

Blower still does not work. The blower motor resistor or blower module gets hot as it powers the fan so often times they can burn out causing certain speeds of the fan in your car to stop working the fan can be stuck on one speed only work on high speed or not work on any settings.