Heater wont work, fan runs, but cant chamge temp 2001 F150 SUPERCREW 5.4

Do you hear any clicking or popping noises coming from dash area when you try to change the temperature? If so, you have either a bad blend door actuator or a broken blend door. If it's just the actuator, you can find it by following the popping noise to the location. It is under the dash close to the passenger's side of the vehicle. The actuator is easy to change once you find it. If the blend door is broken, you will have to pull the dash out and remove the air plenum from inside the dash to gain access to the blend door.

NO MATTER WHAT, FIX THE F-15O and -AS OFTEN AS POSSIBLE - crush PT CRUISERS, [they are TRUE road hazards].

Now this may not sound like esxpertice but you will see that it is.