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Error code reference

Miele Freezer Error Code 5-5-1

Icemaker

Miele codesMiele freezer codes

Icemaker: Water tank temperature sensor faulty.

First step from the service manual

Check temperature sensor. If okay, check door electronics.

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

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What 5-5-1 means on a Miele freezer

Error code 5-5-1 on a Miele freezer indicates a fault with the water tank temperature sensor in the icemaker system. This sensor monitors the temperature of the water supply tank used by the icemaker to ensure water is at the correct temperature before the ice-making cycle proceeds. When the control system detects that the sensor signal is outside of the expected range, either due to an open circuit, short circuit, or an out-of-range resistance reading, it logs this fault code and may suspend icemaker operation to prevent damage or malformed ice production.

The diagnostic process begins with a physical and electrical inspection of the temperature sensor itself. A faulty sensor can result from corrosion at the connector pins, a damaged sensor element, wiring harness damage near the water tank, or a genuine failure of the sensor component. If the sensor checks out within specification, the fault path moves to the door electronics module, which processes the sensor signal. This sequencing suggests that the door electronics board contains the input circuitry responsible for reading this sensor.

Because this fault involves the icemaker subsystem specifically, the freezer's primary cooling function is typically unaffected. However, ice production will be impaired or halted until the fault is resolved. Technicians should inspect connectors at both the sensor and the door electronics board for moisture ingress or terminal damage before condemning either component.

Source: manufacturer service documentation.

Common causes of 5-5-1

  1. 01

    Faulty water tank temperature sensor

    Part replacement

    The sensor itself may have failed, producing a resistance value outside the expected range or showing an open or short circuit. This is the most direct cause and should be tested first with a multimeter.

  2. 02

    Damaged or corroded sensor connector

    Wiring / connection

    Moisture near the water tank can corrode the connector pins linking the sensor to the wiring harness, causing intermittent or failed signal transmission. Inspect the connector for oxidation, bent pins, or moisture damage.

  3. 03

    Wiring harness damage

    Part replacement

    The wiring between the water tank temperature sensor and the door electronics module may be pinched, chafed, or broken, interrupting the sensor circuit. A continuity check of the harness will identify this issue.

  4. 04

    Faulty door electronics module

    Part replacement

    If the sensor and wiring both test correctly, the door electronics board may have a failed input circuit that is misreading or not reading the sensor signal. This is diagnosed after ruling out the sensor and wiring.

  5. 05

    Moisture ingress into electronics or sensor housing

    Wiring / connection

    Water exposure near the icemaker components can cause temporary faults that mimic sensor failure. Inspect the area for signs of leaking and allow components to dry before retesting.

See the test procedure for each cause

Frequently asked questions about 5-5-1

What does 5-5-1 mean on a Miele freezer?
Error code 5-5-1 indicates that the icemaker's water tank temperature sensor has been detected as faulty by the control system. The appliance cannot read a valid signal from this sensor, which causes the icemaker to stop functioning normally. The freezer's primary cooling function is generally not affected by this fault. Diagnosis begins with testing the temperature sensor, followed by inspection of the door electronics module if the sensor is found to be working correctly.
Can I fix error code 5-5-1 on my Miele freezer myself?
Some basic checks, such as inspecting the sensor connector for corrosion or loose pins, are accessible to a knowledgeable DIYer. However, properly testing the temperature sensor requires a multimeter and familiarity with reading resistance values. Replacing the door electronics module is a more involved repair and is generally better suited to a qualified appliance technician.
Is my Miele freezer safe to use while showing error code 5-5-1?
Yes, the freezer compartment should continue to maintain safe temperatures for food storage since this fault is isolated to the icemaker subsystem. The icemaker may stop producing ice until the fault is resolved, but the core refrigeration function is not typically compromised. If you notice temperature fluctuations in the freezer itself alongside this code, additional faults may be present and a technician should inspect the unit promptly.
How much does it cost to repair error code 5-5-1 on a Miele freezer?
Repair costs vary depending on which component is at fault. Replacing a water tank temperature sensor typically falls in the range of $50 to $150 for the part, plus labor. If the door electronics module requires replacement, parts alone can range from $150 to $400 or more, depending on availability. Labor costs will vary by region and technician.
Will resetting my Miele freezer clear error code 5-5-1?
A reset may temporarily clear the fault code from the display, but if the underlying hardware problem, whether a failed sensor, damaged wiring, or faulty door electronics, has not been addressed, the code will return. Resetting is not a substitute for diagnosis and repair. It can be useful as a first step to confirm whether the fault is intermittent or persistent, but the root cause must be corrected for the icemaker to function reliably.

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