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Error code reference

Miele Dryer Error Code F1

Short circuit in heater bank temperature sensor (2R30); resistance corresponds to >480°F (250°C).

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Short circuit in heater bank temperature sensor (2R30); resistance corresponds to >480°F (250°C).

First step from the service manual

Check the line and the plug of the heater bank temperature sensor for a short circuit.

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

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What F1 means on a Miele dryer

The F1 error code on a Miele dryer indicates a short circuit condition detected in the heater bank temperature sensor, identified by the component designation 2R30. This sensor monitors the temperature of the heater bank during operation, and the control board continuously reads its resistance to determine the actual temperature. A short circuit causes the resistance to drop to an abnormally low level, which the control board interprets as a temperature reading exceeding 480 degrees Fahrenheit (250 degrees Celsius). Because no legitimate operating condition should produce that extreme a reading, the board recognizes it as a fault and halts operation to prevent potential damage.

The 2R30 sensor is a negative temperature coefficient (NTC) type thermistor, meaning its resistance decreases as temperature rises. A short circuit in the wiring harness or at the connector plug collapses the resistance to near zero, mimicking an impossibly high temperature reading. The fault is therefore not necessarily caused by actual overheating but by an electrical fault in the sensor circuit itself.

The first area to inspect is the wiring harness and connector plug associated with the 2R30 sensor. Chafed insulation, pinched wires, or a contaminated or damaged connector can create a short to ground or between conductors. If the wiring checks out, the sensor itself may have failed internally with a shorted element, requiring component replacement. The heater bank area should also be inspected for heat damage to surrounding wiring, which can cause insulation breakdown and intermittent or permanent shorts.

Source: manufacturer service documentation.

Common causes of F1

  1. 01

    Short circuit in the sensor wiring harness

    Wiring / connection

    The wiring leading to the 2R30 heater bank temperature sensor may have damaged or chafed insulation, causing conductors to contact each other or a grounded surface. Visually inspect the full length of the harness for pinch points, heat damage, or worn insulation.

  2. 02

    Faulty or corroded sensor connector plug

    Wiring / connection

    The connector plug at the 2R30 sensor can develop corrosion, moisture intrusion, or damaged terminals that bridge the contacts and create a short circuit. Unplug the connector, inspect the terminals for corrosion or deformation, and check resistance across the pins.

  3. 03

    Failed 2R30 temperature sensor

    Part replacement

    The thermistor element inside the sensor can fail internally in a shorted state, producing a near-zero resistance reading regardless of actual temperature. If wiring and connectors check out normally, measure resistance directly at the sensor terminals to confirm an internal failure.

  4. 04

    Heat-damaged wiring near the heater bank

    Part replacement

    Prolonged exposure to elevated temperatures in the heater bank area can degrade wire insulation over time, eventually causing a short circuit. Inspect wiring routed near or attached to the heater assembly for brittle, melted, or discolored insulation.

See the test procedure for each cause

Frequently asked questions about F1

What does F1 mean on a Miele dryer?
F1 on a Miele dryer indicates a short circuit in the heater bank temperature sensor circuit, designated 2R30. The control board is reading a resistance level that corresponds to a temperature above 480 degrees Fahrenheit (250 degrees Celsius), which is outside any normal operating range. The dryer shuts down to prevent potential damage until the fault is resolved.
Can I fix the F1 error on my Miele dryer myself?
A knowledgeable DIYer can begin by unplugging the dryer and inspecting the wiring harness and connector plug of the 2R30 sensor for visible damage, corrosion, or shorts. If a damaged wire or corroded connector is found, those can sometimes be repaired without purchasing parts. However, if the sensor itself has failed internally, replacing the 2R30 sensor requires disassembling part of the dryer cabinet and working near the heater assembly, which many homeowners prefer to leave to a qualified technician.
Is it safe to keep using my Miele dryer when F1 is displayed?
No, the dryer should not be operated while the F1 fault is active. The error indicates the heater bank temperature sensor circuit is compromised, which means the control board cannot reliably monitor heater bank temperature. Operating the dryer without a functioning temperature sensor removes an important safety check and could allow the heater to operate in an uncontrolled manner.
How much does it cost to repair a Miele dryer F1 error?
Repair costs vary depending on the root cause. If the fault is a damaged wire or connector that can be repaired without new parts, a service call labor charge is typically the primary expense, often ranging from $100 to $200 depending on your area. If the 2R30 temperature sensor needs replacement, parts and labor combined can range from $150 to $350 or more, depending on local labor rates and parts availability.
Will resetting the dryer clear the F1 error code?
Cycling power to the dryer may temporarily clear the F1 code, but the fault will return as soon as the control board reads the sensor circuit again and detects the short circuit condition. A reset does not address the underlying wiring or component failure. The sensor circuit must be inspected and the short circuit corrected before the error will clear permanently.

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