I have a Kenmore chest freezer that I turned into a kegerator a while back. I added a secondary temperature controller that turns the power on and off via a relay. I always keep the internal thermostat on max to ensure it runs efficiently. A few weeks ago, I unplugged the freezer to clean it up after a keg leak caused some mold. After doing this and plugging it back in, the cooling stopped working properly—it's taking ages to drop even a single degree, and the compressor is running nonstop. I've checked a lot of the electrical components: the compressor has continuity across its pins, the thermostat works when turned on, the overload protector and start relay have continuity, and the capacitor is nearly on spec. However, the compressor is really hot to the touch, and I suspect there are no visible coils since they're likely built into the freezer walls. Could this indicate a refrigerant leak? I'm out of ideas here!
2 Answers
Have you checked if the compressor is making any unusual noises? Sometimes, mechanical issues come with grinding or rattling sounds, which might point to a problem. Also, make sure the condenser or radiator isn't covered in dust—cleaning that could really help if debris is blocking airflow. It might also be worth looking for any corrosion that could indicate a leak.
It sounds like you might have lost refrigerant. If your compressor is running continuously but the temperature barely changes, that's usually a sign. Since your electrical components are functioning properly, it’s likely beyond repair for a chest freezer. But it’s strange how defrosting would lead to a refrigerant issue; that’s puzzling for sure.