Rick's Free Auto Repair Advice

Posts Tagged: blower stays on high speed

Blower motor won’t shut off

Blower motor keeps running after car is shut off If you have a vehicle with climate control system and a variable speed blower motor and the blower motor won’t shut off and stays on HIGH with the car turned off and the key out, chances are the blower motor motor control processor is toast or the HVAC control module is damaged. The processor is what lets you select and infinite range of blower speeds. In vehicles without climate control, you’ve only got three blower speeds and those are controlled by a … Read More

Blower Motor Stays on High

Blower Motor Stays on High If your Blower Motor Stays on High you should suspect a burned out blower motor resistor—unless your vehicle has auto temp control (climate control). Those systems do not use a resistor. They vary the fan speed by sending a varying voltage from the temp control to the blower motor power module. To test the system, connect a digital volt meter to the dark blue/light blue wire at the blower motor power module and see if the voltage varies as you change the fan speed with … Read More


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