neither,blower resistor or blower module controls fan speeds.
More than likely the blower motor resistor pack is bad, although it can also be the switch itself.
the blower switch itself is located in the instrument panel. it adjust the speed of the blower. the blower resistor, if that is what you are looking for,is located beside the blower motor under the pass. side of the dash
There is a Blower Motor Resistor Pack. Either the blower motor speed control switch itself is defective or the Resistor Pack is bad.
try changing the fuses for the blower or maybe the motor blower itself or the blower resistor.....................
switch contact"s
Heater motor switch and or the connection at the switch is melted. Also check connections at the blower motor and blower motor resistor for melt down damage.
Check the fuse and relay to start. If these are ok, then check the blower switch, the resister, then the blower motor itself.
More than likely the culprit is a defective blower motor resistor pack. It can be the switch itself, but it is unlikely. I replaced the switch and had the same problem, its most likely the resister, this is a recall so your local ford dealer should fix it for free if not id call up ford and complain
Blown fuse, bad blower motor switch, blower motor itself, or a defective blower motor resistor pack.
Either your switch is messed up, or more likely the blower motor resistor is bad.
In the switch assembly itself.
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.