Q. What happens when a blower motor fails?

Answer

Because the blower motor resistors are responsible for supplying power to the blower motor, it is possible to turn off the power supply to the motor if the resistor fails or develops any other problems. If the power to the blower motor fails, the blower motor will be unable to generate much air pressure, resulting in the heating and cooling system not having any air circulating through the vents. Therefore, in such a case, there are chances that the air condition short circuits and thereby causes a circuitry problem in the house.