Chrysler Repair: 98 Chrsyler Concorde AC/Heat problem, negative battery cable, flat blade

Question
QUESTION: Kevin, my AC and Heat work great when they work, in either mode, it will stop cooling and get very hot, or when heating, it will shift to blowing cold air.  From some of the other questions/answers, it seems that problem might be the blend door actuator.  Sometimes with changing up the temp and fan speeds, it might shift back to correct mode.  I have basic mechanic skills, so any guidance that you could give would greatly help.  thanks, joe

ANSWER: does it change from hot to cold when u have it in auto mode??  or do u have normal temp knobs  manual.

---------- FOLLOW-UP ----------

QUESTION: I have the auto temp control. Yes, it does change when I have it in the auto mode, not only from cold to hot, but it does it when it should be hot and then shifts to cold.  I was able to do the diagnostic by pressing the floor/defrost-floor/ front defrost and got the following Code--35, I tracked down the code, which indicates the failure of the evaporative temp sensor.  Now to figure out how to locate the sensor and replace.  From your experience, would you confirm the code?  If so, what would you suggest in replacing the sensor, thanks, joe

Answer
correct diog of code    go to a dealer to get a new sensor probe  


EVAPORATOR TEMPERATURE SENSOR
The Evaporator Temperature Sensor is located on the lower right side of the heater housing.

REMOVAL
Open hood and disconnect the negative battery cable remote terminal from the remote battery post Negative Battery Cable Remote Terminal
Remove right under panel silencer.
Disconnect wiring connector for evaporator probe.
At center of heater housing, locate evaporator probe access plate. Using a flat blade pry tool, pull back on the locking tab. Twist the access plate counter clockwise one-quarter turn and remove plate.
Pull probe out of evaporator core. This plate must be pushed inside the A/C unit and orientated in such a way that the plate can be removed.
INSTALLATION
For installation, reverse the above procedures. The new probe must not go into the same hole (in the evaporator coil) that the old probe was removed. The evaporator is manufactured with three holes for probe insertion. Insert the probe in the uppermost hole Evaporator Probe Needle