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GE fridge CSCP5UGXAFSS evap coils icing up in fresh food section (I can't figure this one out!)

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So many months back the evaporator coils in the fridge started icing up and I cannot for the life of me figure this fix out. I have replaced the thermistor on the side of the fresh food section, the motherboard, the drip pan (it was corroded and clogged so I swapped that out and cleared the drip drain). I have replaced the heater in the freezer section and the defrost thermostat. The only other thing I can think of to replace before throwing this damn thing into a volcano is this weird right angle thermistor that lives in an aluminum bracket zip tied to the fridge evap coils. It seems like it's a regular old thermistor but it's heat molded into a right angle fitting that sticks snug into the bracket thing. This part does not seem to exist in the official parts diagrams for the fridge on the GE site.

Any ideas? "Throw the fridge and yourself into a volcano" is a valid suggestion cus that's about where I am at with my frustration on this one!!

photos of the problem:

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15 hours ago, bradyhall said:

aluminum bracket zip tied to the fridge evap coils. It seems like it's a regular old thermistor

That’s the little devil! Replace it with the same thermistor for everything else - WR55X10025. That will be the fresh food evaporator thermistor. It’s been a while since I’ve done one, but I seem to recall digging the old one out of the aluminum block (a thermal mass) and using RTV to seal the new one in. If that’s not possible, zip tie the new one so it is tight against the evaporator coil in the same location....and then it’s ready for the volcano toss! 

If you have the ability to test the resistance of the thermistor with a multi-meter you can do it on the control board in the back. Look for the J1 connector pins J1-1 to J1-5. Look for  5k ohms at room temp and 70 - 80K ohms at -10 to -20. One handy trick is to drop it in a glass of ice water and it should show a resistance of 16.3K ohms at 32 degrees.

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