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what is the year, make, model, and engine size of your vehicle??
2001/02 dodge ram 1500v6
The blend door is controlled electronically with an actuator. You will need to remove the evaporator box from inside the dashboard to access the actuator or the door. I have had alot of problems with these doors breaking but usually it is not intermitten. I would lean towards an actuator issue but you will need to do some disassembly for further diagnostics.
is this a thermostat control or a rheostat controlled actuator isit over counter part or dodge part only
Dodge part only
They are controlled electronically by the control module. Its position is determined based upon a feedback signal to the control module. The door position is set durring the calibration process and stays in the exact same place based upon the voltage signal from the control module.
Therefore the position is predetermined, not based upon temperature.
the control modual is located where?
The unit in the dashboard is the control unit. Its called the hvac unit.
Where you change the fan speed and the temperature.
how to check control module and actuator
how do you determine whether the control module is bad or the actuator is at fault