How a Liebherr reads out a fault
Liebherr builds precision refrigeration and wine-storage appliances, and unlike a purely mechanical unit, a Liebherr fridge, freezer, wine cabinet or Monolith column actively monitors itself. When a sensor reading drifts out of range or a function fails, the control displays a short fault code or a temperature alarm on the panel rather than leaving you to guess. Reading that code correctly is the fastest route to an accurate repair, because each one points at a specific sensor, the evaporator, the defrost system, the control board, or simply a door left open. This page explains the genuine codes Liebherr uses across the range so you know whether you are looking at a quick reset or a job for a technician.
The codes split into two generations. Classic displays use single letters and numbers (the F-series and the E-series alarms), while newer SmartDevice and touch-UI models add longer alphanumeric codes. Both are covered below, and every appliance type has its own breakdown on the error codes library.
Sensor faults: the F-series
The F-codes report a failed or out-of-range temperature sensor, and they are the most common Liebherr fault you will see on a classic display:
- F0 — the BioFresh “fresh air” sensor has faulted.
- F1 — the fridge-compartment sensor has failed.
- F2 — the evaporator sensor is faulty, which can leave the unit not cooling or icing over.
- F3 / F4 — the freezer air sensor (F3) or freezer evaporator sensor (F4) has failed.
- F5 — a microprocessor or control-board fault.
A single failed sensor will not always stop the appliance, but it blinds the control to one compartment’s temperature, so a sensor or board fault should be diagnosed promptly. Our refrigerator code guide walks through the F-series in detail.
Temperature & door alarms
Alarms are warnings about the state of the cabinet rather than a hardware failure:
- E0 / E1 / E2 — a temperature alarm: a compartment has drifted warmer than its set point.
- HI and LO — high-temperature and low-temperature alarms.
- DOR — a door-open alarm; often clears once the door is closed and seated.
- AL02 / AL03 — a freezer high-temperature alarm (AL02) and a sensor/temperature-monitoring fault (AL03).
- EE / RE — an electronics/control fault (EE) and a compressor or refrigeration-circuit error (RE).
Many alarms are self-resettable: close the door, confirm the unit is not in demo mode, and give the cabinet time to recover its set temperature after a recent load. Wine units mostly use these temperature and door alarms; see the wine-storage diagnostics for the specifics.
Defrost & NoFrost faults
On NoFrost models, two codes relate specifically to the automatic defrost cycle. dF indicates a defrost-cycle failure, and AFR flags an auto-defrost (NoFrost) failure — either of which lets frost build on the evaporator and gradually chokes airflow. HF or HA humidity/frequency alarms appear on some models. These are most relevant to freezers, where a defrost fault shows up as ice build-up and rising temperature.
SmartDevice & touch-UI codes
Newer Liebherr appliances with the SmartDeviceBox and touch displays use longer alphanumeric codes. BT011, BT021, BT031 and BT071 are temperature or air-sensor faults tied to specific compartments. GQ033 reports a sensor malfunction. PH00x codes are communication or protocol errors between modules, and PZ001 / PZ002 point to a display or UI fault. A bare “–” on the display means the control cannot read a valid temperature. These are common on the connected Monolith columns; the Monolith code guide covers them.
When to reset and when to call
Door alarms, demo mode, and a one-off warm alarm after loading groceries usually clear on their own or with a power cycle — disconnect the appliance for a minute, restore power, and watch the panel. A persistent F-series sensor code, an EE board fault, an RE refrigeration error, or a dF/AFR defrost failure calls for a technician with genuine Liebherr parts. Our certified technicians diagnose every Liebherr code across refrigerators, freezers, wine units and Monolith columns; you can confirm your model on the manufacturer’s site at liebherr.com. When you are ready, schedule your repair and our team will confirm the next available visit.