Remove the blend door actuator mounting screws from the hvac module.
Ford f150 blend door actuator fuse location.
Heres a step by step how to video on a temperature blend door motor actuator video for you 2004 2010 ford f150.
Very common for that part to fail on your tru.
For the last 20 or 30 years in these trucks they have been prone to failure.
Remove the blend door actuator mounting screws from the hvac module.
A failed heater blend door or actuator can cause the temperature control for the hvac system to stop working.
There is also and air inlet door actuator which is mounted behind the glove box on the far right side.
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Disconnect the electrical connection at the blend door actuator 10 in pic below.
A ford f 150 s blend door is the device that controls how much heat or ac comes through the hvac system.
The temperature blend door actuator which is located behind the radio on top of the evaporator case.
If you have dual temperature control ac there is another actuator on the bottom of the case.
Remove the blend door actuator as an assembly with the actuator cam.
A clicking sound from the dash area would commonly indicate an actuator fault.