Mechanics

A/C BLEND DOOR PROBLEM

2000 Chrysler 300

Air Conditioning problem
2000 Chrysler 300 6 cyl Front Wheel Drive Automatic 181000 miles

Climate Control System won't heat car.
System is stuck in " COLD" mode. Regardless of temperature I set, it blows cold air.

I never use the " AUTO" feature. I always use the manual method of setting temp and fan speed.

I replaced the Blend door motor with a new part from dealer.
I just replaced the control panel with a used part.

Problem remains.

Diagnostic codes with ORIGINAL control panel:
36 ATC Head Communication Failure
23 A/C Blend Door Feedback Failure
26 ATC In-Car Sensor

I disconnect the negative battery cable
and install the USED control panel, reconnect battery
and the temperature on the overhead console reads 75F (its about 52F outside)
Same problem (no warm air) but I only get a code 23

If I connect the blend door motor, but let it hang down so I can see it turn, it moves a good deal when I run diagnostics, but when I try to set temp to LO or HIGH it barely moves. (With either control panel)

While the motor is off, I can move the door until I hear it " SHUT" and then I get HOT AIR, so I dont think the door itself is bad.

Where do I go from here?
This is frustrating!
Avatar
Danny_P
February 26, 2010.




Email me at scottydee@allaboutcarcare. Com

I have some diagnostic tables that you will need to resolve the feedback issue.

Tiny
Scotty Dee
Feb 26, 2010.


AD