Miele Refrigerator Error Code F5

F5 indicates that the bottom compartment air NTC sensor (B22) has been detected as defective by the control board. As a result, the refrigerator shuts off the compressor and all heaters to prevent uncontrolled operation without reliable temperature data. The sensor must be tested against the resistance values in Table 5 and replaced if it is out of specification.

No. When F5 is active, the compressor and heaters are switched off, meaning the refrigerator is not actively cooling. Food stored in the unit is at risk of spoiling, and the refrigerator should not be relied upon to maintain safe temperatures until the fault is resolved. Perishable items should be moved to an alternate cooling source promptly.

If only the NTC sensor needs replacement, parts costs are typically in the range of $20 to $80 depending on the specific model, with professional labor adding $100 to $200 or more depending on your location and the service provider. If the control board is found to be defective, total repair costs can range from $300 to $600 or higher. Getting a diagnostic visit from a qualified technician will provide a more accurate estimate for your specific situation.

A knowledgeable DIYer can check the sensor wiring and connector for visible damage or corrosion without specialized tools. However, accurately diagnosing the B22 sensor requires a multimeter and the resistance reference values from Table 5 to confirm whether the sensor has failed. Replacing the NTC sensor is a relatively straightforward repair, but if the control board is involved, professional service is recommended.

A power reset may temporarily clear the displayed fault code, but the F5 error will return if the underlying cause, such as a failed B22 sensor or damaged wiring, has not been corrected. The control board will re-detect the out-of-range resistance reading and reactivate the fault. The sensor circuit must be properly diagnosed and repaired for the code to clear permanently.