Hey Tom and the group,
Last December, I replaced the HVAC Recirculation Door in my '03 2500. What a royal pain. See the thread at
I finagled around with one hand and one finger of another hand and pulled the door out. It was broken where the door driver's shaft goes in. It appears the driver tried to move the door further than the door could possibly go, and split the plastic driven part of the door.
The door worked when I put it in. The door worked for a few months. There is no adjustment. To quote a bit of the book; "The heater-A/C control module learns the recirculation air door stop positions during the calibration procedure and will store a Diagnostic Trouble Code (DTC) for any problems it detects in the recirculation door actuator circuits."
Any reason you can think of as to why my door broke a second time? I do not have any '3 key on/off' codes nor any dash codes. Do I now need a DRBIII to check the trouble codes or just drive without the door? Help is appreciated.
FMB