Freezer won't shut off

Refrigerator & Freezer Repair
1

Brand:Frigidaire
Model Number:LFFH21F7HWJMain Symptom:freezer runs too long display reads 14 when internal temp is -20
What happens & when:

Error Code (if any)
Parts or tests already tried: replaced door switch, defrost thermostat, electronic control board
Photos / video link:

2

Hello, the temperature sensor located in behind the evaporator cover monitors the temperature of the freezer. 297018400 Thermistor | Genuine Frigidaire OEM In Stock

3

5995598322.pdf (284.3 KB)

297018400 Thermistor.pdf (655.6 KB)

Here is the parts list and a service flash about the thermistor!