Sub-Zero Won’t Turn Off – Condenser Fan Runs Constantly

Many things can cause a fridge to run non-stop. Usually it means the refrigerator is not cooling well enough, and must be diagnosed and repaired. In a few rare cases, some components on the refrigerator are designed to run all the time.

For example, there are older Sub-Zero refrigerators that have the refrigerator evaporator fan, and the condenser fan, hard-wired to run constantly. This means the condenser and evaporator fans will never shut off, running even when they are not needed. You can turn off both the refrigerator, and the freezer portions of the refrigeration unit, and you will still hear the fans running.

Fortunately, on newer models, Sub-Zero has redesigned their refrigerators to turn fans off whenever they are not needed, but this does not help you if you have an older Sub Zero. Getting the fans to shut off, when they are not needed, is not a straight forward solution. At first you might want to wire the fans directly to the thermostats, but that would make the refrigerator run both compressors, and both fans, whenever either the refrigerator, or the freezer, kick on. Running this much current through a wire or component that is not designed to handle the load might cause a meltdown in the wire or component, which would lead to either a short, or an exposed, dangerous live wire, or component.

The good news is, we have created a fix for this at Liberty Appliance. One of the company owners/founders is an Electrical Engineer, and has come up with our own modification to the old Sub Zero circuitry.  This involves rewiring the components, as well as adding our own circuit to the design.  Once installed this kit will run the condenser and evaporator fans only when they needed. This saves you energy AND helps keep your kitchen quieter.

If you are tired of hearing the non-stop noise that your old Sub Zero makes, would like to save on electricity, and you live in the Salt Lake City area (Wasatch Front), give us a call. We would be more than happy to drive out and install our redesign kit in your Sub Zero refrigerator, so that it only runs the fans when they are needed.