Check fuses Could be a defective ignition switch
Check the fuse
fuse or relay most likely
Check to see if you are getting power and ground to the blower motor - if so blower motor is bad. If no power possibly fan switch or selector switch Also check the blower motor resistor, found in heater plenum.
blower motor bad or no power to it chech fuses blower switch blower motor
You can test your heater blower motor by connecting a ground wire to the ground. Connect a power wire, from the battery to the positive post. If the blower motor turns it is working, and if it does not it is bad.
Blown Fuse, loose or disconnected wire, or defective blower motor resistor pack.
Check to see if you are getting power to the blower motor - if so motor is defective if not problem in circuitry to blower motor
check fuses,see if ones blown check power at blower, don't forget the fan switch ,there famous for going out.
Check the fuse and blower relay first. Make sure that there is power getting to the blower motor before changing the motor.
The Heater Blower Relay on a 1993 Ford Explorer is located in the Power Distribution Box. The PDB is in the engine compartment, mounted on a bracket attached to the right fender apron. The Heater Blower Relay is one of six relays, the first relay on the upper left.
check the hvac fuse first if that is ok check the thermistatic control switch make sure you have power going to the blower motor if there is power the blower motor is bad
Check to see if you are getting power to blower motor--if so, bad blower motor If no power- perhaps bad resistor pack at blower motor Bad switch?