Over the last weekend I pulled my dash apart and replaced my heater core and blend door. My problem is now it seems as though the blend door is stuck open, as in it only blows hot hot hot air. It sounds as if the blend door actuator is working because I hear it move but not very much. Besides pulling the dash apart again is there anything I can do to fix it? Has anyone heard of this happening??

97 f150 ext cab 4x4 4.6 e4od trans
179xxx miles

 

You might try removing the actuator and try moving the door manually to make sure it's not binding.

 

you can take the plastic off above the trans hump and below the radio and get access to the control motor without pulling the dash.

 

I agree, sometime on other vehicles there is a stop in them and the door might be stopping it from reaching it's limits