Blower motor fuse: Check the fuse that supplies power to the blower motor. If the fuse is blown, replace it.
Blower motor resistor: The blower motor resistor controls the speed of the blower motor. If the resistor is faulty, it can prevent the blower motor from working.
Blower motor relay: The blower motor relay supplies power to the blower motor. If the relay is faulty, it can prevent the blower motor from working.
Blower motor switch: The blower motor switch controls the speed of the blower motor. If the switch is faulty, it can prevent the blower motor from working.
Blower motor: If none of the above components are faulty, the blower motor itself may be faulty. Replace the blower motor if it is faulty.