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Error code reference

Miele Washer Error Code F2

The NTC Temperature Sensor circuit contains an open or short circuit.

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The NTC Temperature Sensor circuit contains an open or short circuit.

First step from the service manual

Check the NTC Temperature Sensor for an open or short circuit, check wiring and connections, check NTC resistance values per Section 4.6.

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

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What F2 means on a Miele washer

The F2 error code on a Miele washer indicates a fault in the NTC (Negative Temperature Coefficient) temperature sensor circuit. The NTC sensor is a thermistor responsible for monitoring water temperature inside the wash drum. When the control board detects either an open circuit (no signal, indicating a broken wire or failed sensor) or a short circuit (a direct electrical connection where there should be resistance), it triggers the F2 fault and halts the wash cycle to prevent potential overheating or incorrect temperature control.

The NTC sensor works by changing its electrical resistance in response to temperature. As water temperature rises, the resistance of the sensor drops in a predictable, measurable curve. The control board reads this resistance value to determine actual water temperature and adjusts the heating element accordingly. When the circuit is open, the board receives no signal at all. When shorted, it reads an artificially low resistance that may suggest dangerously high temperatures. Either condition renders the temperature feedback loop unreliable.

Diagnosing F2 requires checking the NTC sensor itself, along with all associated wiring and connectors between the sensor and the control board. The resistance values for the NTC sensor at specific temperatures are documented in Section 4.6 of the technical reference. A technician should use a multimeter to measure sensor resistance and compare it against the specified values. Damaged wiring, corroded connector pins, or a failed sensor element are the most frequent root causes of this fault.

Source: manufacturer service documentation.

Common causes of F2

  1. 01

    Failed NTC Temperature Sensor

    Part replacement

    The thermistor element inside the NTC sensor can fail over time, producing either no resistance (open circuit) or zero resistance (short circuit). Measuring the sensor's resistance with a multimeter and comparing it to the values in Section 4.6 will confirm whether the sensor itself has failed.

  2. 02

    Broken or Damaged Wiring

    Wiring / connection

    Wires running from the NTC sensor to the control board can break internally or chafe against moving parts over time, creating an open circuit. Visually inspect the wiring harness along its full length and use a multimeter to check for continuity.

  3. 03

    Corroded or Loose Connector Pins

    Wiring / connection

    The electrical connectors at the sensor and at the control board can develop corrosion or become loose, interrupting the circuit. Disconnecting and inspecting each connector for oxidation, bent pins, or poor seating can identify this issue.

  4. 04

    Short Circuit in the Sensor Circuit

    Part replacement

    Moisture intrusion or insulation breakdown can cause two conductors in the NTC circuit to contact each other, creating a short. This will typically show as near-zero resistance across the circuit when tested with a multimeter.

  5. 05

    Control Board Fault

    Part replacement

    If the wiring, connectors, and NTC sensor all test within specification, the control board's sensor input circuit may have failed. This is the least common cause and should only be considered after all other components have been ruled out.

See the test procedure for each cause

Frequently asked questions about F2

What does F2 mean on a Miele washer?
F2 on a Miele washer indicates a fault in the NTC temperature sensor circuit. Specifically, the control board has detected either an open circuit or a short circuit in the wiring or sensor responsible for measuring water temperature. The machine will not operate normally until the fault is resolved to ensure accurate temperature control during washing.
Can I fix the F2 error on my Miele washer myself?
Some causes of F2 can be addressed by a knowledgeable DIYer, such as reseating a loose connector or replacing a clearly damaged wire. However, properly diagnosing the fault requires a multimeter and the ability to compare NTC resistance values against specifications. If the sensor itself or the control board needs replacement, a qualified technician is recommended to ensure correct parts and safe reassembly.
Is it safe to use my Miele washer while it shows the F2 error?
No, you should not attempt to run the washer while the F2 error is active. The NTC sensor controls water temperature monitoring, and operating without reliable temperature feedback could result in water that is too hot or improperly heated. The machine is designed to stop and display the fault code precisely to prevent this kind of unsafe operation.
Will resetting my Miele washer clear the F2 error code?
A reset may temporarily clear the displayed code, but the F2 fault will return as soon as the control board checks the NTC sensor circuit again and detects the same open or short circuit condition. The underlying electrical fault in the sensor, wiring, or connectors must be diagnosed and corrected for the error to clear permanently.
How much does it cost to repair an F2 error on a Miele washer?
Repair costs vary depending on the root cause. If the fix involves only reseating a connector or repairing a wire, costs could be minimal, primarily covering a service call fee in the range of $80 to $150. Replacing the NTC temperature sensor typically adds $20 to $80 in parts. If the control board is at fault, parts and labor combined can range from $300 to $600 or more, depending on your location and service provider.

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