Miele Refrigerator Error Code F1

F1 on a Miele refrigerator means the refrigerator compartment air NTC temperature sensor has been detected as defective, either short-circuited or open-circuited. The control board uses this sensor to regulate cooling, and when it fails, the unit switches to an emergency compressor cycle of 10 minutes on and 40 minutes off. The refrigerator will continue to run in this limited mode but cannot maintain precise temperature control until the fault is resolved.

The refrigerator will operate in emergency mode with a fixed compressor cycle, which provides some level of cooling but not precise temperature regulation. Food safety can be at risk if the compartment temperature rises too high during the extended off cycles. It is advisable to check compartment temperatures with a thermometer and minimize the time before getting the fault repaired, especially if storing perishable items.

Performing a reset may temporarily clear the F1 error code from the display, but the fault will return if the underlying cause has not been corrected. Since F1 is triggered by a measured sensor resistance that is out of range, the control board will detect the problem again as soon as it checks the sensor signal. A permanent fix requires testing the NTC sensor resistance, inspecting the wiring, and replacing any defective components.

If you are comfortable using a multimeter, you can start by checking the resistance of the NTC sensor and comparing it to the NTC resistance table for your model. Inspect the wiring harness and connectors for visible damage or corrosion as well. If the sensor reads outside the expected resistance range, replacing the NTC sensor is a repair many experienced DIYers can handle. If the wiring and sensor both check out, the control board may be involved and a qualified technician should be consulted.

Repair costs vary depending on what has failed. If only the NTC sensor requires replacement, parts and labor typically range from around $100 to $250. If the wiring harness needs repair or the control board is involved, costs can be higher, generally in the $200 to $500 range or more depending on parts availability and local labor rates. Getting a diagnostic from a Miele-authorized technician will give you a more accurate estimate for your specific situation.