Samsung Refrigerator Issues

[glendodom]

I have a 2018 Montana 3721RL with the Samsung (French door) refrigerator. I have seen the various Samsung frig issues and thought I may have missed the bullet but it has finally bit me now.

The frig compartment coil first started freezing up. First service call they replaced the fan motor. The frig again continued to freeze up. Next the coil sensor, the frig temperature sensor, and the thermal fuse was replaced. That fixed the coil issue of it freezing up but onward to the now issue. The frig will cool to the set temperature and hold it for about 24-36 hours then from that point forward it seems like the MCB isn't reading the actual frig temps. The digital display will show the say temp as that which it is set on. I have a thermometer inside the frig to monitor actual temps. The temps start easing up to the 40-45 range in time even tough I have it set for 34.

The service tech is at ends with where to go next advising the decision to replace the Master Control Board (est. $250) plus service charge cost and ultimately can't guarantee that will be the fix! Wow!

Anyone else how Sansumg issue like this that tend to indicate it is the MCB? I hate to put another $300-400 into a sinking ship when I already have $300 in repairs. Sorta like going to the casino gambling. One more pull and I will win!!! Naturally not covered via warranty per Samsung and they don't have an answer other than order another service call.