Donald D Billerica , MA July 06, 2020 3 year old freezer not cold. Tried the run Capacitor and Controller, extremely easy fix, but that was not the problem. AppliancePartsPros. is a great site to find any appliance diagram and possible fixes and parts! But sometimes it isn't the most common problem. After further digging, it's the thermostat, which is now ordered. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes