Rick's Free Auto Repair Advice

Posts Tagged: blower only works on high

Blower works on high speed only

Why your blower works on high speed only A bad blower motor resistor can cause your blower works on high speed only The blower motor resistor is what’s responsible for giving you three blower speeds. The resistor block contains three different high resistance coils. Think of these coils like a filament in a light bulb. The coil resistance causes them to heat up, thereby reducing the amount of voltage that can flow to the blower motor. When a resistor coil burns out, you lose that fan speed. A blower motor … Read More


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