Hello I'm Tony and I have a 2009 f150 4x4 supercrew cab. Lately my ac blower motor is been acting up. I set it in#4 on the speed **** and it blow good for 1 minute and slow down like to cero. I switched to #3 and worked for little while and started doing the same thing. I did a research and ended up replacing the blower motor resister and didn't solve the problem. Now when the blower do that I switch it from 4 or 3 to 1 for a few minutes and back to 3 or 4 for a few minutes and that's how I drive it every where. I'm really tired of been doing that. Any sugestions please

 

Maybe the motor itself is wearing out.

 

Agree with Meathead.. if the blower motor resistor did not solve that problem I would think the blower motor itself is going bad.