A few months ago I discovered what looked to me like a thermistor with a connector, the other end of which has a grey and red wire. The grey wire appeared to have been cleanly clipped off at the connector. The red was about 3cm long and also clipped. As everything was working I dismissed it. Yes, I do electronics and have lots of parts like this. Who knows how it got there.
Then, just a few days ago, water had collected and frozen in a solid block beneath the fresh drawer. Had to remove it and take out the remaining water.
Downloaded a service manual, checked error codes and got FZ sensor error. This led me here.
Indeed, this is the very same sensor that is reported in the original posting and it failed for the very same reason.
Perhaps this has something to do with the refrigerator compartment issue.
Totally inept design.
It's the last Samsung appliance we'll ever purchase!