Liebherr Refrigerator Error Code F2

The F2 error code on a Liebherr refrigerator indicates that the refrigerator compartment evaporator sensor has been detected as defective. This sensor, also called the evaporator temperature sensor or NTC sensor, monitors the temperature at the evaporator coil inside the refrigerator section. The control board relies on this reading to regulate the compressor cycle and defrost timing. When the sensor signal falls outside the expected range, either due to an open circuit, short circuit, or resistance value outside normal parameters, the board logs F2 and can no longer trust that compartment's thermal data.

When F2 is active, the appliance enters an emergency operating mode to maintain basic cooling function. In this mode, the compressor runs on a fixed cycle of 20 minutes ON followed by 40 minutes OFF, regardless of actual compartment temperature. This keeps food from spoiling in the short term but is not energy efficient and may result in inconsistent temperatures. The emergency cycle bypasses normal sensor-driven control, so the refrigerator will not cool as precisely as it would under normal operation.

The most common root causes are a failed NTC sensor element, damaged wiring between the sensor and the control board, or a corroded or disconnected connector. Physical damage from ice buildup around the evaporator can also stress the sensor leads over time. In some cases the control board itself may have a fault on the sensor input circuit, though board failure is less common than sensor or wiring issues.