Product review (4 stars): Replacement Thermostat
These WPF22 specs are from another retailer's website..."Warm In : -9.5 Celsius Degree;Cold In : -18 Celsius Degree;Cold Out : -24.5 Celsius Degree".  There's a screw on top (usually "glyptaled" )(like a nail polish) that is used to adjust the temperature.  If I remember correctly, clockwise raises the temperature. I once used a WPF-20 to convert a chest freezer to a refrigerator, but a WPF22A can probably be "dialed in" too.  A while ago, after much web searching, I came up with a few "Chinglish" spec sheets for a lot of these thermostats.  Some of them that are made for freezers, and some for electrically  "self-defrosting" refrigerators, and some for non-electrically defrosting refrigerators(more common in the rest of the world).  YMMV!
An ice water bath in a "dewars flask" ("thermos") is exactly 32 degrees F.  You want to adjust the thermostat screw so the contacts open (use an ohmeter, or a battery powered test light) at 32 degrees F with the dial somewhere in the middle of its range before you install the 'stat into the refrigerator...