Hi i have a 2008 ford f150 extended cab 4x4 5.4 engine , i been having problem with my ac vent controller, if i put in max ac blow through defrost but when i set in defrost blow front vent, i been reading but i don't found anyone with the same problem, you guys thing is time to change the door actuator or my control **** is mess up? thank you

 

Did anyone ever solve this? Mine is doing the same thing. When set to defrost it blows through vent, when set to vent it goes to defrost. The loose foam has been removed from the vent doors, so it's not binding. The motor moves through full swing, just seems like the wrong direction.

 

My havac controls are reversed i thought havac control module was bad so I replaced but has same issue. Def is max ac. And max ac is def. Crazy

 

Are we talking auto or manual HVAC ?

 

Automatic. With mine I found the upper door arm (when looking up from the gas pedal) is binding and not going through full range of motion. I already took the center part of the dash apart and removed all the loose foam pieces, Wich allowed the lower arm (when viewed from gas pedal) to work in its full range of motion. I haven't tried to remove the motor assembly and move the upper a by hand, but it looks like the whole dash has to be removed for this fix.

 

Mine is manual

 

Ok but if you have a control module, you have an electric motor moving the flaps, just like mine

 

Yes it does have an electrical module and a electric actuator. But is not automatic HVAC.

 

It cycle through everything but on defrost it blow the max ac setting etc...

 

Because you have the same problem I do... The upper arm isn't moving properly....