Samsung displays wrong temperature, goes into Power Cool mode

[kursk]

Model Number: RF268ABWP
Brand: Samsung
Age: 6-10 years

It's a Samsung French door refrigerator with the freezer on the bottom, RF268ABWP.

It started going into the Power Cool mode by itself yesterday. Manually turning off the Power Cool worked, but then in a few minutes, the display would show the temperatures for freezer and fridge and go back into the Power Cool again. The temperatures displayed would be way high (32 F for the Freezer or 71 F for the Fridge) -- I know for a fact it wasn't the case. It appeared that since the refrigerator sensed the high temps, it wanted to cool them down fast.

I've tried unplugging, resetting by pressing two buttons simultaneously (Energy Saver + Alarm, shows no Error Code.) Cleaned the coils, check for frost and ice buildup. After the last try, it worked fine for about half an hour (showing the right temps, no Power Cool kicking in.)

It's back to showing 72 F on the Fridge temp display and going into Power Cool.

Tried to search online, out of ideas. Please help, I'd really appreciate any ideas. Thank you.

[Doc Ryan]

It is hard to say what is causing your problem. One of the control boards could be bad and causing it to act like this or there could be a short in the wiring. This problem could be very difficult to diagnose.