My fridge is working but the temperature is adjusting by itself

The temperature is adjusting by itself and I don’t know why. I removed the display board and it seems to be burnt. See the images. Is that the problem

Brand:
Model Number: GSE25GGPBCBB
Main Symptom: Changing temperatures by itself
What happens & when: like two weeks ago

Error Code (if any): no
Parts or tests already tried:
Photos / video link:

I don’t see a burnt spot I do see where there is some grease on the board and the logic chip

For GE GSE25GGPBCBB, if by “changing temperatures by itself” you mean the temperature settings on the display are actually changing without anyone pressing the buttons, I would start with the temperature-control/user-interface controls, not the sealed system.

If instead the settings stay at 0°F freezer / 37°F refrigerator but the actual cabinet temperatures fluctuate, then we need to troubleshoot the thermistors, airflow/damper, defrost system, and main control. This model uses thermistors WR55X10025 in both compartments.

Quickest test

Set the refrigerator to:

  • Freezer: 0°F
  • Fresh food: 37°F

Then watch it for several hours.

If the displayed SET temperatures themselves change: suspect a sticking/shorting temperature button, moisture in the control, wiring connection, or the control/interface electronics.

If the displayed settings remain at 0°F/37°F but food temperatures are changing: put a thermometer in each compartment and record the actual temperatures. Some cycling is normal; we’re looking for sustained temperatures well outside the normal range.

Thermistor check

If the actual cabinet temperature is wrong, the thermistors are high on the list. GE uses NTC thermistors—their resistance increases as temperature drops.

With the refrigerator unplugged, disconnect the thermistor before measuring it:

Temperature Approx. resistance
32°F 16.3 kΩ
41°F 12.7 kΩ
50°F 10 kΩ
59°F 7.8 kΩ
68°F 6.2 kΩ
77°F 5 kΩ

The resistance should change smoothly as the sensor warms or cools. An open circuit, short, or reading substantially inconsistent with its measured temperature points toward the thermistor or its wiring.

Also check

Make sure the evaporator fan is running, the freezer rear panel isn’t covered with heavy frost, and the refrigerator-side air outlets aren’t blocked. This model also has a damper control assembly WR49X10251 controlling cold-air delivery into the fresh-food compartment.

If you tell me which number is changing by itself — the displayed SET temperature or the actual refrigerator/freezer temperature — and what numbers you’re seeing, I can narrow this down considerably.