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Error code reference

Miele Washer Error Code F4044

Resistance of NTC 1 less than lowest permissible figure (short circuit).

Miele codesMiele washer codes

Resistance of NTC 1 less than lowest permissible figure (short circuit).

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What F4044 means on a Miele washer

Error code F4044 on a Miele washer indicates that the resistance reading from NTC 1 (the primary temperature sensor) has fallen below the lowest permissible threshold, which the control board interprets as a short circuit condition. NTC stands for Negative Temperature Coefficient, meaning the sensor's electrical resistance decreases as temperature increases. Under normal operating conditions, the NTC sensor produces a predictable resistance value that corresponds to the water temperature inside the drum or heating circuit. When the resistance drops below the minimum acceptable value, the control board concludes that the sensor has short-circuited rather than registering an actual temperature.

This fault directly affects the washer's ability to regulate wash temperature. Because the machine cannot trust the temperature data being reported, it will halt operation to prevent potential overheating or damage to fabrics and internal components. NTC 1 is typically positioned to monitor the water temperature within the heating circuit or sump area, and its signal is critical for the electronic control unit to manage the heating element accurately.

The most common root cause is a failed NTC sensor itself, where internal degradation has caused a short between the sensor's internal leads. However, wiring harness damage, pinched or chafed cables, and moisture intrusion at connector points can also create the same low-resistance condition. In rarer cases, the electronic control board may be misreading the sensor circuit, though the sensor and its associated wiring should always be diagnosed first.

Source: manufacturer service documentation.

Common causes of F4044

  1. 01

    Failed NTC 1 temperature sensor

    Part replacement

    The NTC sensor itself has internally short-circuited, causing its resistance to drop below the minimum permissible value. This is the most common cause and can be confirmed by measuring the sensor's resistance with a multimeter and comparing it to the expected value for a given temperature.

  2. 02

    Damaged or shorted wiring harness

    Wiring / connection

    The wiring between the NTC 1 sensor and the control board may be pinched, chafed, or damaged, causing two conductors to contact each other and create a short circuit. Inspect the harness routing for any areas where insulation may have worn through, particularly near sharp edges or moving components.

  3. 03

    Corroded or moisture-damaged connector

    Wiring / connection

    Moisture intrusion at the connector joining the NTC 1 sensor to the wiring harness can cause corrosion or electrical bridging between the connector pins, mimicking a short circuit. Unplug the connector, inspect for discoloration or residue, and clean or replace as needed.

  4. 04

    Loose or intermittent sensor connection

    Wiring / connection

    A partially disconnected or improperly seated connector at the sensor or the control board can produce erratic low-resistance readings. Reseating all connectors associated with the NTC 1 circuit may resolve the fault if no physical damage is present.

  5. 05

    Faulty electronic control board

    Part replacement

    If the NTC sensor and all associated wiring test within acceptable parameters, the control board itself may be incorrectly interpreting the sensor signal. Control board faults are the least likely 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 F4044

What does F4044 mean on a Miele washer?
F4044 means the resistance from NTC 1, the primary water temperature sensor, has dropped below the lowest permissible value, which the control board flags as a short circuit. The machine stops operation because it cannot safely regulate wash temperature without reliable sensor data. This fault points to the NTC sensor itself, its wiring, or the connector joining the two.
Can I fix F4044 on my Miele washer myself?
A knowledgeable DIYer can attempt to diagnose F4044 by inspecting the NTC 1 sensor wiring and connectors for visible damage, corrosion, or loose connections. Testing the sensor resistance with a multimeter will confirm whether the sensor has failed. Replacing the NTC sensor is a relatively accessible repair, but tracing wiring faults or replacing the control board may require a qualified technician.
Is it safe to use my Miele washer while F4044 is active?
You should not continue using the washer while F4044 is displayed. The machine cannot accurately monitor water temperature with a faulty or short-circuited NTC sensor, which means the heating element could operate without proper control. This creates a risk of overheating the water, damaging fabrics, or stressing internal components.
How much does it cost to repair a Miele washer showing F4044?
Repair costs vary depending on the root cause. Replacing an NTC temperature sensor typically falls in the range of $50 to $150 for parts, with additional labor costs if a technician is performing the repair. If the fault is traced to the electronic control board, costs can rise significantly, often ranging from $200 to $500 or more for parts and labor.
Will resetting my Miele washer clear the F4044 error code?
A power cycle or reset may temporarily clear the F4044 code, but it will return as soon as the control board reads the NTC 1 sensor circuit again and detects the same out-of-range resistance. The underlying fault in the sensor, wiring, or connector must be physically repaired before the code will stay cleared permanently.

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