Thanks in advance if you can assist me!

I have a 2008 F150, 4.6 V8

While driving with my AC on and fan on high, the fan(blower) briefly cut in and out and then blower stopped working. Ichecked the blower fuse and it looks good. I checked the Blower relay and theguy at autozone said if the relay is bad then I will hear clicking under thehood while the motor is running. I hear no clicking. I looked on the internetand found some videos showing how to replace the Blower Motor Resistor so Iinstalled a new Blower motor Resistor. The blower is still not working. While drivingon the highway with the AC on there is a little cold air coming out of thevents however, if I switch it on inside air source (max AC) then the air flowstops. Whatever is under the glove box is getting cold and the AC is working.

Does anyone have an idea how I can get the blower workingagain?

I have never changed my inside air filters and they maybe clogged but would that stop the blower unit from working?

Can anyone direct me to a forum that can help?

 

A clogged filter can definitely kill a motor by making it overheat, but it's unlikely and would take a very long time. Sounds like the blower motor itself just died. Happens. Unplug it and get a meter on the plug and test for voltage through the range. If you've got voltage, you don't have an electrical problem and should replace the motor.

On another note, you did get a little air flow before you turned on recirculate, so it sounds like your blend door works just fine. That's VERY good news.

 

Sounds like your blower motor is bad. Hit a junk yard for an inexpensive replacement.

Ask them for a guarantee.

 

These trucks don't have a cabin filter. I agree that it sounds like your blower motor is toast.