Also Check the Switch it could be bad. Good Luck and
Change Your Mind, Not Your Oil.
Use the First In Synthetic Motor Oil's.
See My Bio For more information. Check fan motor and wires. If the fan is not running, then it is either a blown fuse, defective blower motor speed control switch, bad blower motor resistor pack, or a defective blower motor. If the fuse is good, the odds are the Resistor Pack is bad.