Miele Refrigerator Error Code F120

F120 is an internal diagnostic code indicating that the refrigerator's control board has detected incoming AC supply voltage below 95 volts AC. This code is not shown to the end user and is only visible during service-level diagnostics. It signals a problem with the power supply rather than a failure of the refrigerator's internal components. Correcting the voltage at the source is required to resolve it.

Sustained low voltage can pose indirect risks, as it can cause the compressor and other motors to draw higher current than normal, potentially leading to overheating over time. Food safety is also a concern if the refrigerator cannot maintain proper temperatures due to power issues. Addressing the underlying voltage problem promptly helps protect both the appliance and its contents.

Resetting the refrigerator by cycling power may temporarily clear the stored code, but if the supply voltage remains below 95VAC, the code will return as the control board continues to detect the low voltage condition. A reset does not address the underlying electrical issue. The error will only remain resolved once the incoming voltage is consistently above the minimum threshold.

If you are comfortable using a multimeter, you can measure the voltage at the wall outlet to confirm whether the supply is below 95VAC. If the outlet is the problem, replacing it is a straightforward repair for someone familiar with basic electrical work. However, if the issue is in the circuit breaker, panel wiring, or utility supply, a licensed electrician should be contacted to perform the repairs safely.

If the fix is simply replacing a faulty wall outlet, costs are typically in the range of $75 to $200 including labor. If the issue requires circuit rewiring or a breaker replacement, costs can range from $150 to $500 or more depending on the scope of work. A utility-side voltage problem may require coordination with the power company and could involve little to no direct cost depending on the provider's policies.