mypros+
Error code reference

Miele Washer Error Code F4047

Resistance of NTC 2 greater than highest permissible figure (open circuit).

Miele codesMiele washer codes

Resistance of NTC 2 greater than highest permissible figure (open circuit).

MyPros+ Max

Get the full diagnostic procedure for F4047.

  • 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
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What F4047 means on a Miele washer

Error code F4047 on a Miele washer indicates that the resistance reading from NTC 2 (the second negative temperature coefficient thermistor) has exceeded the highest permissible value in the control system's accepted range, which the system interprets as an open circuit condition. NTC thermistors are resistive temperature sensors whose resistance decreases as temperature increases. When the circuit reads an abnormally high resistance, it means the sensor is either completely disconnected, has failed internally with a broken element, or has a wiring fault that is preventing a valid signal from reaching the control board.

NTC 2 is typically positioned to monitor a specific thermal zone within the washing system, often the drum water temperature or a secondary heating circuit, depending on the Miele model. The control board continuously samples the resistance value from this sensor during operation and compares it to expected parameters. If the resistance climbs above the upper threshold, the board flags F4047 and will typically halt or limit operation to prevent damage from unmonitored temperatures.

The most common physical causes include a failed NTC sensor with an internally open element, a broken or disconnected wiring harness connector between the sensor and control board, or corrosion on the connector terminals that increases circuit resistance beyond acceptable limits. In rarer cases, the control board itself may have a damaged input circuit for NTC 2, though sensor and wiring faults should always be ruled out first before suspecting the board.

Source: manufacturer service documentation.

Common causes of F4047

  1. 01

    Failed NTC 2 thermistor (open circuit)

    Part replacement

    The thermistor element inside the sensor has broken internally, causing the resistance to read infinitely high. 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 NTC curve for the operating temperature.

  2. 02

    Disconnected or damaged wiring harness

    Wiring / connection

    The connector or wire leading from NTC 2 to the control board may have come loose, been pinched, or broken. Visually inspect the harness and connector at both the sensor end and the board end for signs of damage or separation.

  3. 03

    Corroded connector terminals

    Wiring / connection

    Moisture inside the machine can cause oxidation on the NTC 2 connector pins, increasing resistance in the circuit to a level the control board reads as an open circuit. Inspect the connector terminals for green or white corrosion and clean or replace the connector as needed.

  4. 04

    Broken wire within the harness

    Part replacement

    A wire in the NTC 2 circuit may have an internal break that is not visible externally, particularly at stress points near clamps or routing guides. Continuity testing along the full length of the harness will identify this fault.

  5. 05

    Control board input circuit fault

    Part replacement

    If the sensor and all wiring test correctly, the NTC 2 input circuit on the main control board may be damaged. This is uncommon but possible and typically requires board replacement or professional board-level repair.

See the test procedure for each cause

Frequently asked questions about F4047

What does F4047 mean on a Miele washer?
F4047 means the resistance measured from the NTC 2 temperature sensor has exceeded the highest permissible value, which the control system treats as an open circuit. This indicates the sensor is either internally failed, disconnected, or has a wiring fault in its circuit. The machine cannot reliably monitor temperature without a valid NTC 2 signal, so it will restrict or stop operation until the fault is resolved.
Can I fix F4047 myself on a Miele washer?
Some aspects of this repair are within reach of a confident DIYer. You can visually inspect connectors, check for obvious wiring damage, and use a multimeter to test the NTC 2 sensor resistance and harness continuity. If the sensor has failed, replacing it requires disassembling part of the machine, which is more involved. Control board diagnosis and replacement should be left to a qualified technician.
Is it safe to run my Miele washer with error code F4047 active?
It is not recommended to continue running the washer with F4047 active. The error indicates the machine cannot monitor temperature through the NTC 2 sensor, which means heating functions could operate without proper thermal feedback. Running the machine in this condition risks overheating the water or damaging internal components.
Will resetting my Miele washer clear the F4047 error?
A reset may temporarily clear the error code from the display, but the fault will return as soon as the control board samples the NTC 2 circuit again and detects the out-of-range resistance. The underlying hardware fault must be diagnosed and corrected for the error to clear permanently.
How much does it cost to repair a Miele washer F4047 error?
Repair costs depend on what component has failed. A replacement NTC thermistor is typically an inexpensive part, so parts plus labor for a sensor swap might range from around 100 to 250 dollars. If the control board is at fault, costs can rise significantly, often ranging from 300 to 600 dollars or more depending on parts availability and labor rates in your area.

Related Miele washer codes

All Miele washer codes
View all 254 Miele washer codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass