Miele Refrigerator Error Code 4-2-1

Error code 4-2-1 on a Miele refrigerator indicates an internal fault within the icemaker system. The icemaker has detected a condition it cannot resolve on its own, which may involve the water inlet heater, the water supply line, or a failed component inside the icemaker module itself. The appliance will not produce ice while this fault is active.

Start by switching the appliance off and then back on to see if the fault clears. If it returns, inspect and test the water inlet heater located at the back of the appliance for proper function. If the heater is working correctly and the code persists, the icemaker assembly itself needs to be replaced.

Repair costs depend on which component has failed. If a power reset resolves the issue, there is no parts cost. Replacing the water inlet heater is generally a lower-cost repair, typically in the range of $50 to $150 for the part. If the full icemaker assembly requires replacement, parts and labor combined can range from $200 to $500 or more depending on your location and the specific model.

Switching the appliance off and back on is the recommended first step and may clear the code if the fault was caused by a temporary control logic error. However, if an actual hardware failure is present, such as a failed water inlet heater or a faulty icemaker module, the code will return after the reset. A persistent 4-2-1 code after a power cycle requires physical inspection of the components.

This fault code does not indicate a safety hazard. It is specific to the icemaker system and does not affect the refrigerator or freezer cooling functions. Your food will remain properly refrigerated while the fault is present, but ice production will be unavailable until the issue is resolved.