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Error code reference

Miele Refrigerator Error Code 1-3-1

Icemaker

Miele codesMiele refrigerator codes

Icemaker: Sensor fault.

First step from the service manual

Switch appliance off and on; if fault returns, replace icemaker because sensor is not replaceable.

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

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What 1-3-1 means on a Miele refrigerator

Error code 1-3-1 on a Miele refrigerator indicates a sensor fault within the icemaker assembly. The icemaker contains an integrated temperature sensor that monitors ice production conditions and communicates status data back to the main control board. When the control board detects a signal from this sensor that falls outside expected parameters, whether that means an open circuit, a short, or an out-of-range reading, it logs code 1-3-1 and alerts the user. The icemaker unit on these Miele models is a self-contained assembly, meaning the sensor itself is embedded within the module and cannot be separated from it.

Because the sensor is not a standalone replaceable component, diagnostic options are limited. A power cycle, switching the appliance fully off and then back on, can clear a transient fault caused by a momentary signal dropout or a brief electrical glitch. However, if the error returns after a power cycle, the fault is persistent and points to a failure within the icemaker module itself. In that case, the entire icemaker assembly must be replaced to restore normal operation. There is no approved repair path that involves isolating or substituting just the sensor.

Source: manufacturer service documentation.

Common causes of 1-3-1

  1. 01

    Failed integrated icemaker sensor

    Part replacement

    The temperature sensor embedded inside the icemaker module has failed electrically, producing a reading the control board cannot interpret as valid. Because the sensor is part of the assembly, there is no way to test or replace it independently.

  2. 02

    Transient electrical fault or power fluctuation

    Wiring / connection

    A brief power interruption or voltage irregularity can cause the sensor signal to drop out temporarily, triggering a false fault. A power cycle will resolve this if no physical component has failed.

  3. 03

    Loose or damaged wiring connection to icemaker

    Wiring / connection

    A wiring harness connector to the icemaker module that has worked loose or suffered damage can interrupt the sensor signal and trigger this code. Inspect the connector at the icemaker for corrosion, bent pins, or a loose fit.

  4. 04

    Moisture or ice damage to the icemaker assembly

    Part replacement

    Water intrusion or excessive frost buildup inside the icemaker compartment can damage the sensor circuitry within the module. If visible ice accumulation or moisture is present around the icemaker, this is a likely contributing factor.

See the test procedure for each cause

Frequently asked questions about 1-3-1

What does 1-3-1 mean on a Miele refrigerator?
Error code 1-3-1 on a Miele refrigerator indicates a sensor fault in the icemaker assembly. The icemaker contains a built-in temperature sensor, and the control board has detected that the sensor signal is invalid or absent. Because the sensor is integrated into the icemaker unit and cannot be replaced separately, a persistent fault requires replacing the entire icemaker assembly.
Will resetting my Miele refrigerator clear the 1-3-1 error?
A reset, meaning switching the appliance off and then back on, may clear the error if it was caused by a temporary electrical glitch or power fluctuation. If the code returns after the power cycle, the fault is persistent and a reset will not resolve it. In that case, the icemaker assembly needs to be replaced.
Can I fix the 1-3-1 error myself without replacing any parts?
The first step is always to perform a power cycle by turning the refrigerator off and back on. You can also check that the wiring harness connector to the icemaker is fully seated and free of visible damage or corrosion. Beyond those steps, there is no DIY repair path since the faulty sensor is not accessible or replaceable as a standalone part.
Is it safe to keep using my refrigerator when the 1-3-1 code is active?
Yes, the 1-3-1 code is specific to the icemaker sensor and does not affect the main refrigeration or freezer cooling functions. Your food will remain properly cooled and frozen. The icemaker may not produce ice reliably while the fault is active, but there is no safety risk associated with continuing to use the appliance.
How much does it cost to fix a Miele refrigerator showing error code 1-3-1?
If the error requires replacing the icemaker assembly, repair costs typically include the part itself plus labor. Icemaker assembly parts for Miele refrigerators generally range from around $150 to $400 or more depending on the specific model, and professional labor costs vary by region but commonly add another $100 to $250. Getting a quote from a Miele-authorized service technician before proceeding is recommended.

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