Heater blower doesn't work.
 

I have a 99 F150 and yesterday the blower fan on my heater stopped working. I still have heat and I can change between panel,defrost, etc. I checked the fuse, I think it was 24, and it was fine. Its cold up here in alaska so I would really appreciated some help.

got a trim level to go with that info ?

Does the truck have a manual or EATC HVAC system ?

Do you get any fan movement on any speed ? manual has lo med-lo med and high I think are the position names.

There are 2 fuses with the blower.

Battery Junction box ( engine compartment ) fuse # 105 40 A is for the blower itself.
Central Junction box ( cab ) fuse # 22 is for the coil on the blower relay. The blower relay is with the flasher ( 2 items in one block ) under the dash, around the steering column. PITA to find, but it is there.

Quick test ( after checking the fuses above ) is to pull the blower relay, and jumper the normally open contacts with a wire. Start with the 2 fuses above, then we can move from there.

Check the speed resistor behind the glove box in the plenum of the heater. Mine broke down regularly, either repalce it it is cheap or in my case soldered it in solid.
Pete B.