Chrysler Repair: 01 T&C AC problem, dashboard switch, calibration tests


Question
I have a 2001 town and country, the ac control has settings for driver,passenger and rear. Was an auto mechanic years ago. Problem: Air blowing out of passenger side is cold but drivers side is on the warm side. I have evacuated and recharged the system and have done a vent reset. Is there a sensor that controls the air temp. or did the dashboard switch go bad? My 2 guesses. Any experts. Thanks

Answer
Hi Frank,
There is a separate blend door for each side, so perhaps the driver side is binding up. You can gain access to it on the left side of the unit, before doing that have you tried to do a calibraion and fault code readout?
I am handicapped in only having a manual for the '98 model, but that one has a self-diagnostic capability to test the calibration of all the actuators and assess the cooldown capability of the system. The test may well be available also in your 2001, but I can't guarantee it.
Starting the tests is fairly straight forward, but following up on any faults requires further action/interprestation of the way the lights are flashing at the conclusion of the first test. All the possibilities cover about 6+ pages in the manual.
But let us give it a try. The engine must be running. Set the blower on HIGH, set mode to the PANEL position, open all AC outlets, Set temperature slide pot(s) to COLD, Depress WASH and REAR WIPER simultaneously for 5 seconds (Until all LED's light). The LED's will stay on for 5 seconds. Calibration tests are running when the rear wiper and intermittent are alternatively flashing. Cooldown test is running when the A/C and recirc lights are flashing.
Acceptable result is when the rear wiper only LED is flashing.
Push rear wiper button to exit.
Interpretation of codes (presumably stored if you don't get the above result) is an involved process for which it would be better to xerox copy and postal mail you the pages.
So see whether your unit seems to behave according to what I have described, and please let me know.
Roland