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Error code reference

Miele Freezer Error Code F116

Evaporator NTC faulty (resistance corresponds to temperature below -66°F/-55°C or above 140°F/60°C).

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Evaporator NTC faulty (resistance corresponds to temperature below -66°F/-55°C or above 140°F/60°C).

First step from the service manual

Replace evaporator NTC.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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What F116 means on a Miele freezer

The F116 error code on a Miele freezer indicates a fault detected in the evaporator NTC (Negative Temperature Coefficient) sensor. This thermistor is responsible for monitoring the temperature of the evaporator coil, which is a critical reference point for the freezer's refrigeration cycle and defrost control logic. The control board continuously reads the resistance output of this sensor and converts it to a temperature value. When the resistance reading falls outside the expected range, corresponding to a temperature below -66°F (-55°C) or above 140°F (60°C), the board interprets this as a sensor fault and triggers F116.

The out-of-range resistance reading typically points to one of two failure modes: either the sensor has developed an open circuit, which drives resistance extremely high and registers as an impossibly low temperature, or it has developed a short circuit, which drives resistance extremely low and registers as an impossibly high temperature. Both conditions render the sensor signal unusable for accurate temperature regulation. In some cases, the wiring harness between the sensor and the control board may be damaged, corroded, or improperly connected, producing the same erroneous resistance readings without the sensor itself being defective.

Because the evaporator NTC directly influences defrost cycle timing and compressor control decisions, a faulty reading can cause the freezer to behave erratically, run continuously, or fail to maintain proper temperature. The recommended first diagnostic action is replacement of the evaporator NTC sensor. Before replacing the sensor, technicians should also inspect the wiring harness and connector for visible damage, corrosion, or loose terminals, as these issues can mimic a failed sensor.

Source: manufacturer service documentation.

Common causes of F116

  1. 01

    Failed evaporator NTC sensor

    Part replacement

    The sensor itself has developed an open or short circuit internally, producing a resistance value outside the valid operating range. This is the most common cause and is confirmed by measuring the sensor's resistance with a multimeter and comparing it to the expected value for the ambient temperature.

  2. 02

    Damaged wiring harness or connector

    Wiring / connection

    The wiring between the evaporator NTC and the control board may be broken, chafed, or corroded, interrupting or distorting the resistance signal. Inspect the harness for visible damage and check connector terminals for corrosion or looseness.

  3. 03

    Corroded or loose sensor connector

    Wiring / connection

    Moisture inside the freezer compartment can cause corrosion at the sensor connector, increasing contact resistance and producing an out-of-range reading. Cleaning or replacing the connector can resolve this without replacing the sensor itself.

  4. 04

    Ice accumulation around the sensor

    Part replacement

    Excessive ice buildup around the evaporator coil can physically damage the sensor or its leads over time, eventually causing a circuit fault. This is more likely if the freezer has had prior defrost system issues.

  5. 05

    Faulty control board

    Part replacement

    In rare cases, the control board's input circuit for the evaporator NTC may have failed, causing it to misread a functioning sensor. This should only be suspected after confirming the sensor and wiring are both in good condition.

See the test procedure for each cause

Frequently asked questions about F116

What does F116 mean on a Miele freezer?
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.
Can I fix the F116 error myself on my Miele freezer?
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.
Is it safe to keep using my Miele freezer when F116 is displayed?
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.
How much does it cost to repair a Miele freezer F116 error?
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.
Will resetting my Miele freezer clear the F116 error code?
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.

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