HP15WS My HP15WS Wine refridge is cooling about 10 degrees lower than the set point. I have tried various settings, turned the unit off for 24 hours and back on, still about 10 degrees below the set point, 64 set point is 53.6 degrees actual. The unit is 2 1/2 years old and used to work fine. I clean the cooling fins several times a year. What could be wrong and how do I fix this?

I think you need a new thermostat.

I have this Perlick wine cooler: http://smartitbuy.com/s/?p=43735 for 4 years and haven't had any issues with it so far.

This is Perlick's toll free number 800-558-5592 why don't you call them and check the price of a new thermostat of your refrigerator.
here are more contact details: https://www.perlick.com/contact-us

Cheers,

Sounds to me you have a thermistor issue which is basically a thermostat but it is electronic now...should be inside the bin on the side wall somewhere make sure its in contact and clean may need to be replaced