Originally Posted by linsys
How did you switch the blend door by hand? I am all of a sudden having problems with my heater and its been working perfectly. I remember I had a Ford Explorer and the blend door went out but I could tell because of the loud clicking noise... I'd like to see if I can manually switch the blend door to see if the heat starts.
You have to find the blend door actuator motor which is under the dash on the passanger side. There are two screws that fasten the motor to the blend door and the rear screw is a PAIN to get to. Once you pull the actuator motor down, you can get to the rod that swings the blend door between heat and A/C. Check the little plastic piece that connects the blend door motor and the blend door. This generation of Ram has a problem with that piece cracking or breaking. If that's what's wrong, you can get a metal replacement piece from Heater Treater for about $30. They also have a video on their website that will show how to get to the blend door motor.