Why does the blower motor keep running with the key off If your car uses has a variable speed fan, it uses a blower motor controller instead of a blower motor resistor. It’s a solid state device that allows the motor to run and variable speeds. However, if the blower motor keeps running after you turn off the car, that’s a sign of a failed blower motor controller; it fails in the ON position. Those controllers used to be installed only on vehicles with automatic climate control with variable speed … Read More

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