It is possible the blower motor fan is starting to seize up or is loose and catching on inside fan housing.
blower motor relay
It is a 2007 Ford Explorer Eddie Bauer Edition. The moon roof is stuck in the tilted position.
A weak battery would do that
Needs a tune-up, and bad blower motor.
You will need to replace the blower motor control unit located inside the blower motor housing, this part is not the same as the part on standard explorers, it is not the same blower motor resistor.
Apparently it is the rear air "blender" ( whatever that is(?)) My 2003 Explorer was making the loud clicking sound from the rear driver side above the rear left wheel. I lived with it for a month before I just found the answer on the net. I turned off the rear fan control (from the front controls) and the clicking has stopped. I guess there is no more air from the rear now but the clicking has stopped- Car is long been paid off and I'm happy again.
The bearings are out of it. Replace Blower motor.
Climate control blower motor was the fix. The part cost 441 dollars.
Blower shaft bushing worn.
Blower resistor has failed. It is located behind the glove box.
Open hood . Disconnect blower module located near blower fan. Disconnect, if blower shuts off, repalce module
central airconditioner makes a clicking noise when running? any idea what to check?