Sub-Zero Error Codes
& Diagnostics

COMPRESSOR-LOUD Beverage Centers COMPRESSOR-LOUD describes the condition on Sub-Zero beverage centers where the compressor is producing an abnormal knocking, rattling, or grinding noise during its operating cycles. The sound typically originates from the base of the unit and is most noticeable when the compressor first starts or when the kitchen is otherwise quiet. Medium View details → DOOR-AJAR Beverage Centers DOOR-AJAR describes the condition on Sub-Zero beverage centers where the glass door is not closing flush against the cabinet frame or the gasket is no longer providing an airtight seal. Observable signs include condensation forming on the exterior of the glass door and a chime alarm that sounds every few minutes. Medium View details → FROST-BUILD Beverage Centers FROST-BUILD describes the condition on Sub-Zero beverage centers where visible frost or ice is forming on the back wall, side walls, or shelves of the beverage zone. Frost should not accumulate in a properly operating beverage center; its presence indicates a defrost cycle failure or a door gasket leak that is introducing excess moisture. Medium View details → LIGHT-FAIL Beverage Centers LIGHT-FAIL describes the condition on Sub-Zero beverage centers where the interior LED accent lighting is out or significantly dimmed. Opening the door shows a dark or dim interior instead of the expected illuminated display of the beverage cabinet contents. Low View details → NO-COOL Beverage Centers NO-COOL describes the condition on Sub-Zero beverage centers where neither cooling zone is reaching its setpoint temperature. Drinks feel room-temperature despite the unit running, and the temperature display shows the current reading well above the target. High View details → TEMP-HIGH Beverage Centers TEMP-HIGH describes the condition on Sub-Zero dual-zone beverage centers where one zone is consistently running five or more degrees above its setpoint temperature, while the other zone may cool normally. The partial nature of the failure points to a zone-specific component rather than a whole-unit cooling failure. Medium View details → EC05 Built-In Refrigerators The EC05 error code indicates the refrigerator cabinet thermistor has read open or shorted for 10 or more consecutive seconds, or has produced repeatedly erratic temperature readings. Customer troubleshooting is not available for this fault — Factory Certified Service is required. High View details → EC06 Built-In Refrigerators The EC06 error code indicates the refrigerator evaporator thermistor has read open or shorted for 10 or more seconds, or has produced erratic readings. Customer troubleshooting is not available — Factory Certified Service is required. High View details → EC07 Built-In Refrigerators The EC07 error code indicates the freezer cabinet thermistor has read open or shorted, or has produced erratic readings. Customer troubleshooting is not available — Factory Certified Service is required. High View details → EC08 Built-In Refrigerators The EC08 error code indicates the freezer evaporator thermistor has read open or shorted, or has produced erratic readings. Customer troubleshooting is not available — Factory Certified Service is required. High View details →