Car Heater Fan Only Runs On High
Though having only one fan speed usually indicates a bad blower resistor a diligent mechanic at a repair shop will test the resistor fan switch and connections to the motor to make sure nothing.
Car heater fan only runs on high. The fan in your car stopped working except when set to the highest setting. My heater and ac fan only works on high when i turn my switch on for the fan on the heater and ac it only works on full blast. If the resistor block tests out good and you don t have any fan speed or a slow fan speed for all speeds you can assume that the blower motor is at fault since everything else has tested out ok.
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