1997 Explorer heater/ac blower stopped working. Was making clacking sound prior.

You can try to smack the motor to see if it comes on (old trick)
its where the passanger feet go smack the large black box on the bottom. if it comes alive you need a motor. and by the sound of the clacking, also sounds like a blower motor. be advised that you can **** things off the pass floorboard when in recirc mode. i have removed lots of debris from blower motors. :)

Blower makes noise when heater is on