Chrysler Repair: 2000 chrysler 300m code 35, 2000 chrysler 300m, atc code

Question
Roland,

I have read great things and hope you can help me out. here is my problem.

I have a 200 Chrysler 300M. The atc code shows a number 35 evaporator sensor failure? Please help.
I have gone through the steps to automatically diagnose the automatic control system for my 2000 Chrysler 300M. When it has run through all its checks the trouble code that is displayed on the atc control panel is code #35?

The internet says this is the evaporator sensor failure? None of the auto parts stores can find this part. Is it called something else? In addition I called the local shop and they said it would need to be brought in. Has anyone else seen this code and fixed it? what was it and how did you fix it?

The biggest problem is that the air conditioner works fine and the fan blows great but I cannot seem to get any heat. the coolant level is fine and the the car does not overheat. Heater core is not leaking so this really makes no sense. The ac seems to work when the auto function is set or when used manually just not the heat. Any help would be greatly appreciated. Thanks.  

Answer
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Your help is most appreciated, Jeremy

Hi Jeremy,
Earlier this month I answered your question about your car and hope that is is repaired now. I have a favor to ask:
I am competing to be recognized as 'volunteer of the month' at this site. Would take a moment to click on the "Thank/rate the expert" button below?  You will then see a question which asks whether to nominate me for that award. If you then click on "yes" that would give me another vote. Thank you for your help.
Roland

Hi Jeremy,
There is an evaporator sensor and it is certainly available at a dealer parts counter. It is however only used during AC operation (in hot weather) and its purpose is to prevent the evaporator from getting too cold and freezing up. When it approaches that point (based on its temp and the environmental temp) it disconnectes the AC compressor. When you get around to replacing that sensor let me know and I will xerox and postal mail you a couple of pages from the manual that show where it is and describe how to change it.
So it has nothing to do with inadequate heat from what I can tell. More likely is the that the heater core and/or hoses thereto and return are blocked enough that insufficient hot coolant is going through the heater core. After the engine has warmed up, and I presume the temp gauge reads at least 1/3 of full scale, open the hood and touch the two hoses that run from the engine through the firewall and to the heater core. You will see those near the midline of the car and about at the level of the underdash ac/heater distribution box in the cabin. The two hoses should be HOT, though one may be slightly cooler as that is the return hose which is carrying coolant that has given off some heat energy. If one is very much cooler than the other then you aren't getting flow and thus no heat. The first thing to try would be to remove the hoses at the engine and attach a garden hose to the cold side hose and flush domestic water under pressure through the core to 'backflush' it. Also inspect the hoses for possible blockage of the lumen.
Other than that, it could be possible that the blend air door which adjusts the hot/cold air balance to achieve the requested output temp is binding up or the actuator that moves it is not doing so. However there are fault codes for those possibilities and none of those has shown up. But be aware that there may be more than the code 35 stored in the memory. After the 35 is displayed try pressing the PANEL button on the control panel for additional codes, one at a time. Codes 23,32,37,38 are all related to the blend door. Let me know if you get one of those.
Roland
PS:Please 'rate' my answer and consider a nomination of me to be 'expert of the month'. Thanks