Problem with my cab air thermostat adjustment

For some reason, I get only HOT or normal blowing air on my temp gauge for cabin air adjustment dial.

The engine thermostat is working, because I'm getting hot blowing air, but when I try to turn it down, there does not seem to be a mix of cold and hot, so it's just one extreme or the other.

Is there a fix I'm missing somewhere?

2007 F150 5.4 4 Door

Dutchie

 

Sounds like the temp control blend door
actuator isn't working properly.

Anyone else have an opinion?

 

Sounds like blend door to me too

sent from area 51

 

This happened to me recently in my 08 xlt. Replaced my blend door and it took care of it. Only a 25$ part from the dealer

 

blend door