The blower motor on a vehicle does not run when the fan switch is in the low and medium position. It works properly when it is in the high position. Technician A says the problem is in the resistor block. Technician B says the problem is in the blower motor. Who is correct?

Question

Quizplus · Accepted Answer

The resistor block is responsible for controlling the speed of the blower motor by offering different levels of electrical resistance. When the blower motor does not work on low and medium settings but works on high, it typically indicates a problem with the resistor block, not the blower motor itself. The high setting often bypasses the resistor block, allowing the blower motor to run at full speed directly from the power source.

The Blower Motor on a Vehicle Does Not Run When