Sub-Zero Refrigerator Error Code 15 8 00

Error code 15 8 00 means the ice maker relay on the control board is stuck in the open position, cutting off all power to the ice maker. The relay is a switching component on the main control board that is responsible for delivering voltage to the ice maker during operation. With the relay stuck open, the ice maker cannot run its motor, heater, or harvest cycle. Resolving this code requires replacing the control board.

Yes, this error code affects only the ice maker circuit and does not impact the refrigerator or freezer cooling functions. Your food and frozen items remain at safe temperatures while this fault is present. The only consequence of leaving it unrepaired is that the ice maker will not produce ice until the control board is replaced.

A power reset may temporarily clear the fault code from the display, but it will not repair the underlying hardware failure. Because the ice maker relay is physically stuck open on the control board, the fault condition persists and the code will return once the refrigerator runs its diagnostics again. A lasting repair requires control board replacement rather than a reset.

A knowledgeable DIYer can inspect wiring harnesses and connectors between the control board and ice maker as a first step. However, if those check out, the repair requires replacing the control board, which involves working with the refrigerator's electrical system and properly seating multi-pin harness connectors. If you are not comfortable with appliance electrical repairs, a qualified technician is recommended to ensure the board is installed and connected correctly.

The primary repair for this fault is control board replacement. Control board parts for Sub-Zero refrigerators typically range from $200 to $600 or more depending on the specific model. Adding professional labor, total repair costs commonly fall in the range of $350 to $900. Costs vary based on your location, service provider, and the exact unit model.