This is REVERSE problem of your sticky post.

I am using a WIFI thermometer to monitor the freezer and fridge sections of my Samsung RF26J7500SR french door refrigerator about 4 years old.. The fridge section is fine. Maintains +-3 from setting but the freezer section suddenly is varying 25-30 degrees 2-3x a day. The device I use to monitor sends email notifications when temp varies widely. and also creates a history graph. It suddenly goes up to around +17 then down to -6 (set for -2). The fridge stays right on temp. This happens multiple times of the day usually about 6-8hours apart. The freezer seals look fine.

Example: 11PM last night went from -6 to +17, then at 6AM this morning went from -3 to +13 and just now at 4:30PM went from -5 to +17. NO, it hadn't been opened at all.

Any idea on what to look at ?? Fridge section is no problems at all.

Thanks

Well, in the 18months I had the (WiFI) temp sensors to monitor installed inside the freezer and fridge it has never happened. Just started a few weeks ago. It's only the freezer section, the fridge is stable. That's a pretty high change. Always up to 16 or 17 degrees from minus 2 to 4. The temps are quite accurate because I have compared them to plain freezer thermometer.