Miele Freezer Error Code F116

F116 indicates that the evaporator NTC sensor is reading a resistance value that corresponds to a temperature below -66°F (-55°C) or above 140°F (60°C), both of which are outside the physically possible operating range. This tells the control board that the sensor signal is invalid and cannot be used for temperature regulation. The fault is most often caused by a failed sensor or a wiring problem between the sensor and the control board.

Continuing to use the freezer with an active F116 fault is not advisable, as the control board cannot accurately monitor evaporator temperature without a functioning sensor. This can lead to improper defrost cycling, continuous compressor operation, or failure to maintain safe freezing temperatures for stored food. You should address the fault promptly to avoid food spoilage or potential damage to other components.

Performing a reset by unplugging the freezer or cycling the power may temporarily clear the F116 display, but the error will return as long as the underlying sensor fault remains present. The control board will detect the out-of-range resistance reading again once power is restored and resume displaying the fault. A permanent resolution requires diagnosing and correcting the sensor, wiring, or control board issue causing the invalid reading.

A knowledgeable DIYer can start by inspecting the wiring harness and connector near the evaporator coil for visible damage or corrosion, as these issues do not require parts and are straightforward to address. If the wiring looks intact, replacing the evaporator NTC sensor is the recommended next step and is a manageable repair for someone comfortable working with appliance components. If the error persists after replacing the sensor, the issue may involve the control board, which is more complex and may warrant a professional technician.

If the repair only requires a new evaporator NTC sensor, parts costs are generally in the range of $20 to $80 depending on the specific model, with professional labor adding $100 to $250 or more depending on your location. If the wiring harness needs repair or replacement, costs may be slightly higher. A control board replacement, if needed, is the most expensive scenario and can range from $200 to $500 or more for parts alone.