Miele Refrigerator Error Code F112

F112 indicates that the SmartFresh compartment NTC temperature sensor is reporting a resistance value that falls outside the range corresponding to any valid operating temperature, specifically below -66°F (-55°C) or above 140°F (60°C). The control board cannot use this data to regulate the SmartFresh zone, so it flags the fault. The cause is typically a failed sensor, a broken wire, or a faulty connection in the sensor circuit.

The SmartFresh compartment may not maintain its intended temperature and humidity conditions while this fault is active, which means produce stored in that zone may not be preserved as effectively. The main refrigerator and freezer compartments are typically controlled by separate sensors and should not be directly affected. It is best to avoid storing perishables in the SmartFresh drawer until the fault is resolved, but the overall appliance is generally not a safety hazard.

A power reset may temporarily clear the fault display, but the code will return if the underlying sensor or wiring problem has not been corrected. The control board continuously monitors the SmartFresh NTC resistance and will re-trigger F112 any time the reading falls outside the valid range. A reset is useful for confirming whether the fault is intermittent, but it is not a repair solution.

A knowledgeable DIYer comfortable with using a multimeter can check the wiring harness and connectors for visible damage or continuity faults. However, sourcing and replacing the correct SmartFresh NTC sensor requires identifying the specific part for your Miele model, and improper handling of refrigerator components can cause additional faults. If wiring checks do not reveal an obvious problem, professional service is recommended to avoid misdiagnosis.

If only the SmartFresh NTC sensor needs replacement, parts costs are typically in the range of $20 to $80 depending on the specific Miele model, with labor adding $75 to $200 or more depending on your location and the service provider. If the fault is traced to the main control board, parts alone can range from $150 to $400 or higher. Getting a diagnostic visit from a Miele-authorized service technician will give you a precise estimate before committing to repair.