Why does the fan only run on the highest setting?
Why does the fan only run on the highest setting? Most commonly the fan will only run on the highest setting. This is a well documented problem, and is caused by a failing blower motor resistor. Correcting the problem is straight forward, and requires replacement of the small resistor. Can a blower be bypassed with a high CarGurus fan? And yes, the resistor is bypassed with the fan is on high. You should check and make sure the blower motor is working properly, not jammed, or any obstructions preventing the free movement of the blade/fins. Any obstructions or hindrances can...