Chrysler Repair: 1994 Concorde AC blowing only HOT air, crankshaft sensor, diagnostic capability

Question
After my " mechanic" replaced the crankshaft sensor< the AC which was blowing
arctic air a week ago, prior to the repair, is now blowing very hot air, no matter
how low  I set the temp. I checked fuse number 6 and another one that says
blower and ATC and they both are fine. This is the extent of my mechanical
knowledge I can check a fuse >> Please help it is 108 today in SC!!

Answer
Hi Tom,
In addition to fuse #6, look at fuse #13, and also check for a 4-wire disconnect plug on the left side frame rail where one of the wires is black/pink and it should have 12V on it when measured between it and the - post of the battery. Let me know if any of those checks don't prove to be OK.
Then I answered this for a '95 a few days ago about how to do a self-test of the unit. Try that and let me know:
"The air diversion and temperature of the air is controlled by actuator motors on several doors of the unit. The doors are controlled by the ATC head unit. But before concluding that the head unit is the problem it would be worthwhile doing a self-diagnostic test which is a feature of the head unit. Here is how I previously answered a similar question:
"Before concluding a new panel is needed a test should be done to see if the computer has recognized any problems and described them in the form of two digit fault codes stored in its memory. Did someone do such a inquiry? If so, what numbers did they get? If not you can do the readout yourself:
The unit does have a self-diagnostic capability. The engine has to be running and the car not in motion to do the test. Simultaneously press the floor, mix, and defrost buttons, (the 1st,2nd and 4th on the top row) and see if the display unit begins to blink. Release the buttons when it has started to do that and then after it blinks for a while longer watch for two digit numbers to appear on the readout. Those are the fault codes. If the first number appears and stays in place, push on the first button in the bottom row (panel) to continue the readout. At the end of the readout the unit will return to normal settings.
Then write back with the number(s) and also tell me more about exactly what is wrong with the function of the unit.*
If the head unit doesn't respond at all, then check fuse #6 under the dash. There is also a 12V supply line to the control that is directly connected to the battery on a black/pink wire on the green plug on the rear of the control unit that should be checked to verify that you are getting that power to the control unit.
I would do a thorough readout before buying a new control unit. It may be a part in the air distribution system itself rather than the computer that is the problem. And you also might find a working used unit at a wrecking yard.
Roland
*The code numbers range from 23-36. You can also get a decoder list at www.allpar.com/fix/codes_climate.html

Once you get any codes it can then direct you toward which part(s) might be the cause of the fault."
We have got to get you some cooling, my friend.
Roland