Liebherr Wine Coolers Error Codes

AL

Display shows AL or flashes temperature with an alarm symbol; interior is too warm.

High Temperature Alarm

d1

Display shows d1 or door symbol; audible alarm sounds; unit may stop cooling after prolonged door open.

Door Open Alarm / Door Switch Fault

E1

E1 displayed on dual-zone Liebherr wine cooler; one zone not controlling temperature correctly.

Upper Zone Temperature Sensor Fault

E2

E2 displayed on dual-zone Liebherr wine cooler; lower zone temperature unstable or not cooling.

Lower Zone Temperature Sensor Fault

E3

E3 displayed; fan symbol may flash; poor air circulation between zones.

Circulation Fan / Cross-Flow Fan Fault

E4

E4 displayed; defrost issues or irregular compressor cycling may be observed.

Defrost Sensor / Evaporator Sensor Error (Alternate Code)

E5

E5 displayed; compressor may not start; unit remains warm.

Compressor Control / Inverter Fault (on inverter models)

E6

E6 displayed; interior lighting may fail or flicker; cooler otherwise operates.

LED Lighting Circuit Fault

E7

E7 displayed; humidity control not functioning correctly on models with active humidification.

Humidity Sensor / Humidification System Fault

F0

Wine cooler runs but cannot reach set temperature; display may show F0 and interior feels too warm.

Cabinet Temperature Sensor Failure

F1

Wine cooler shows F1 and may overcool or not cool correctly; temperature display may be inaccurate.

Evaporator Temperature Sensor Failure

F2

Display shows F2 and the wine cooler may not regulate temperature correctly; compressor may run continuously or not at all.

Ambient Temperature Sensor Failure

F3

F3 displayed; interior light and fan may behave erratically; temperature control may be unstable.

Control Panel / Keypad Temperature Sensor or Interface Fault

F4

F4 error displayed; compressor may not start or may shut down quickly; unit not cooling.

Compressor Start / Relay Circuit Fault

F5

F5 displayed; interior fan may not run; temperature stratification (warm at top, cold at bottom).

Evaporator Fan Motor Fault

F6

F6 error; unit may not defrost properly, leading to ice buildup on the back wall and poor cooling.

Defrost Heater or Defrost Circuit Fault

F7

F7 displayed; compressor may not run; unit remains warm despite power being on.

Compressor Overload or High-Temperature Protection Fault

F8

F8 error; interior light and display may flicker; unit may randomly restart or shut down.

Power Supply / Low Voltage Fault

F9

F9 displayed; audible alarm may sound; temperature may drift and not match setpoint.

Communication Fault Between User Interface and Main Control Board

Lo

Display shows Lo or very low temperature; bottles may be over-chilled or partially frozen.

Overcooling / Thermostat Control Fault

Symptom

Buttons on the control panel do not respond or respond intermittently.

Keypad / Touch Control Failure

Symptom

Cabinet exterior sides feel very hot to the touch during operation.

Condenser Heat Transfer / Ventilation Issue

Symptom

Clicking sound every few minutes; compressor attempts to start but stops quickly; little or no cooling.

Compressor Start Failure

Symptom

Condensation forming on the outside of the door or around the frame.

Excess External Condensation

Symptom

Display is blank or unreadable, but interior light and cooling still work.

Display / User Interface Failure

Symptom

Door does not close properly or pops open slightly after being shut.

Door Alignment / Hinge or Gasket Issue

Symptom

Excessive frost or ice buildup on the back wall or around the evaporator; fan noise may increase.

Defrost System Failure or Door Seal Leak

Symptom

High-pitched squealing or grinding noise from inside the cabinet when cooling.

Evaporator Fan Bearing Wear

Symptom

Interior humidity too high; condensation on bottles and shelves.

Excess Humidity in Cabinet

Symptom

Interior humidity too low; corks appear dry on models with humidity control.

Insufficient Humidification

Symptom

Interior light not working but cooler otherwise operates normally.

Lighting Circuit Failure

Symptom

Loud humming, rattling, or vibrating noise during operation; noise may change when door is opened.

Mechanical Vibration or Fan/Compressor Mounting Issue

Symptom

Strong musty or moldy odor inside the wine cooler.

Microbial Growth Due to High Humidity or Spills

Symptom

Temperature difference between top and bottom shelves is larger than expected; stratification of temperature.

Poor Air Circulation

Symptom

Vibration transmitted to cabinetry or floor, causing rattling noises in surrounding furniture.

Installation / Isolation Issue

Symptom

Water pooling at the bottom of the wine cooler or on the floor in front of the unit.

Condensate Drain Blockage or Excess Condensation

Symptom

Wine cooler cycles on and off very frequently (short cycling).

Control or Sensor Instability

Symptom

Wine cooler interior too cold; bottles freezing near back wall despite normal set temperature.

Thermostat / Sensor Calibration Error

Symptom

Wine cooler not cooling at all; interior at room temperature; display and lights work but no cold air.

Compressor or Sealed System Failure

Symptom

Wine cooler not starting at all; display and lights are off; no signs of power.

No Power / Main Supply Fault

Symptom

Wine cooler runs continuously but does not reach set temperature; interior is cool but not cold enough.

Partial Refrigerant Loss or Reduced Cooling Capacity