Good point. I guess you based that on the fact that all three zones can not go lower than 31 degree?
Now I just need to find out if Subzero makes a winecooler that uses part #4201992.
I wonder if they physically look the same. If so, it's possible the seller mislabled the part # given that
the instructions page is missing. We know this much: 1) the board I bought looked identical to the one
I have, 2) my board has two zones, fridge and freezer, and 3) the new board has three zones but none
of them can go lower than 31 degrees.