Sub-Zero Refrigerator Error Code 46

Error code 46 means the refrigerator's control system has detected an open circuit in the ice accessory wiring. This indicates that electrical continuity has been lost somewhere along the wiring that connects the control board to the ice maker assembly. The ice maker will not function until the open circuit is located and repaired.

A reset may temporarily clear the displayed fault code, but it will not resolve the underlying open circuit in the ice accessory wiring. If the wiring issue is not corrected, the code will return once the control system performs its next diagnostic check. The open circuit must be physically repaired to permanently clear the error.

Repair costs depend on what is causing the open circuit. If a connector simply needs to be reseated, the cost may be limited to a service call fee, typically in the range of $100 to $200. If a wiring harness needs to be replaced, parts and labor combined could range from $200 to $500 or more depending on your location and the specific harness required.

If you are comfortable working with basic electrical tools, you can begin by inspecting the ice maker wiring harness and connectors for obvious disconnections or damage. Reseating a loose connector may resolve the fault without professional help. However, if the issue involves a broken wire or damaged harness, splicing or replacing wiring is best handled by a qualified appliance technician.

Error code 46 is not a safety hazard in the way that a refrigerant leak or overheating fault would be. It specifically relates to the ice maker wiring circuit and does not affect the core refrigeration or freezing function of the unit. However, the ice maker will remain non-operational until the fault is corrected.