Sorry to hear that your wine cooler is not right. This is a commercial site for commercial equipment.
However, what type of control does it have. If it has a Dixel temp control, power is at certain pins only and one has to have a wiring diagram to know the correct ones. Some of the pins are for a thermister, and some for computer programming.. I don’t know which controler you have, so can’t tell you what terminals to test on.