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Error code reference

Miele Dryer Error Code F2

Heater bank NTC sensor (2R30) open-circuited, equivalent to temperature less than 20°C; only registered after…

Miele codesMiele dryer codes

Heater bank NTC sensor (2R30) open-circuited, equivalent to temperature less than 20°C; only registered after heating has been on for at least 1 min.

First step from the service manual

Check the heater bank temperature sensor (2R30), its leads and its plug connections for short or open circuit.

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 dryer

The F2 error code on a Miele dryer indicates that the heater bank NTC temperature sensor, identified as component 2R30, has developed an open circuit condition. An NTC (Negative Temperature Coefficient) thermistor produces a resistance value that decreases as temperature rises. When the circuit is open, the control board receives no valid resistance signal, which it interprets as an extremely low temperature reading, below 20°C. The control logic is designed to register this fault only after the heating element has been active for at least one minute, which allows the system to distinguish a genuine sensor failure from a momentary startup anomaly.

The 2R30 sensor is mounted at or near the heater bank and monitors thermal output during the drying cycle. If the sensor, its wiring harness, or its plug connections fail to maintain a continuous electrical path, the dryer cannot confirm that the heater bank is producing heat. This causes the control board to flag the fault rather than risk running an unmonitored heating system. An open circuit can result from a broken sensor element, a fractured wire in the harness, or a corroded and disconnected plug terminal.

Diagnosis should begin with a visual inspection of the 2R30 sensor body, its connecting leads, and all plug connections for signs of heat damage, corrosion, or mechanical breakage. A multimeter set to resistance mode can confirm whether the sensor element itself has failed by checking for continuity through the thermistor. Wiring continuity from the sensor plug back to the control board should also be verified. If the harness and connections test good but the sensor reads open circuit, replacing the 2R30 sensor is the required repair.

Source: manufacturer service documentation.

Common causes of F2

  1. 01

    Failed 2R30 NTC sensor element

    Part replacement

    The thermistor element inside the sensor can break internally, producing an open circuit even when the external wiring looks intact. Testing with a multimeter will show no continuity across the sensor terminals.

  2. 02

    Broken or fractured sensor wiring harness

    Part replacement

    The wires connecting the 2R30 sensor to the control board can crack or break, especially near strain points or areas exposed to repeated heat cycling. A visual inspection along the full length of the harness and a continuity test will identify the break.

  3. 03

    Corroded or disconnected plug connection

    Wiring / connection

    The plug terminals at the sensor connector can corrode over time or work loose due to vibration, interrupting the circuit. Inspecting the plug for corrosion, burn marks, or loose terminal pins is a quick first check.

  4. 04

    Heat damage to sensor or leads

    Part replacement

    Prolonged exposure to high temperatures near the heater bank can degrade the sensor housing or melt insulation on the leads, causing an open circuit. Visible discoloration or melted insulation on the wiring is a clear indicator.

See the test procedure for each cause

Frequently asked questions about F2

What does F2 mean on a Miele dryer?
F2 indicates that the heater bank NTC temperature sensor, component 2R30, has an open circuit condition. The control board interprets an open circuit as a temperature reading below 20°C, signaling that no valid thermal data is being received from the heater area. This fault is only logged after the heater has been running for at least one minute, confirming the failure is real rather than a startup glitch. The dryer will not continue operating until the fault is resolved.
Can I reset the F2 error code and keep using the dryer?
Resetting the dryer may temporarily clear the fault display, but the F2 code will return once the heater has run for a minute and the control board again detects the open circuit. Because the sensor monitors heat output during operation, continued use without fixing the underlying fault is not recommended. The root cause, whether a failed sensor, broken wire, or loose connection, must be corrected to permanently clear the error.
How do I fix the F2 error on a Miele dryer?
Start by inspecting the 2R30 sensor, its wiring leads, and all plug connections for visible damage, corrosion, or loose terminals. Use a multimeter to test continuity through the sensor element and along the harness wiring back toward the control board. If the sensor itself reads open circuit, it will need to be replaced. If wiring or a plug connection is the cause, repairing or replacing the affected section of the harness resolves the fault.
Is it safe to run my Miele dryer when the F2 code is showing?
Running the dryer with an active F2 fault is not advisable. The 2R30 sensor is responsible for monitoring the temperature at the heater bank, and without a functioning sensor the control system cannot verify that heating is operating within safe limits. Miele's control logic flags the fault specifically to prevent unmonitored heater operation. The dryer should be taken out of service until the sensor circuit is inspected and repaired.
How much does it cost to repair an F2 error on a Miele dryer?
Repair costs vary depending on whether the issue is a failed sensor, damaged wiring, or just a loose connection. A replacement NTC sensor typically falls in the range of $20 to $60 for the part alone. If professional labor is needed, total costs including diagnostics and installation generally range from $100 to $250, depending on the technician and region. Repairs involving more extensive wiring harness replacement will be toward the higher end of that range.

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