Monolith Refrigerators Diagnostics
Liebherr Monolith Refrigerators
Liebherr Monolith Refrigerators
Error Codes
Meanings, severity levels, safe checks you can perform, and when to call a technician.
Enter the code shown on your monolith refrigerators display
Is it safe to keep using it?
Depends on code severity. Low/Medium codes often allow continued use, High severity requires immediate stop.
Can error codes be reset?
Some codes clear after power cycle. Persistent codes indicate underlying issues needing repair.
When should I stop using it?
Stop immediately for water leak codes, burning smell, or any High severity error.
Error Code Directory
Click any code for detailed troubleshooting steps
Low
Medium
High
Code
Meaning
Severity
Common Symptom
BT011
Refrigerator Compartment Air Sensor Fault
High
A separate thermometer placed inside the column shows temperature 5–15°F higher or lower than the InfoLight display target after several hours.
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BT021
Refrigerator Evaporator Sensor Fault
Medium
Cabinet temperature is normal at first but slowly creeps upward as ice builds on the evaporator and progressively blocks airflow.
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BT031
Freezer Compartment Air Sensor Fault
High
A separate thermometer placed inside the affected freezer column reads 10–20°F warmer than the InfoLight display target after a few hours.
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BT071
Ambient Air Sensor Fault
Low
Cabinet temperature stays at the set point because the cabinet sensor is unaffected. BT071 is a degraded-mode fault, not a food-safety fault.
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GQ033
Base Compartment Fan Motor Fault
High
The compressor runs but cannot reject heat efficiently because the condenser coil is starved of airflow. Cabinet temperature climbs by 5–10°F over several hours.
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PH001
Communication Error Between Control Boards
High
The user interface cannot communicate with the column control board, so it shows nothing useful. Touch buttons either do not respond or do not produce expected results.
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PZ001
User Interface Hardware Error
Low
The visible display panel inside the column shows nothing, all dashes, or fragmented digits. Touch buttons may light up but produce no response.
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PZ002
User Interface Memory Error
Low
Time/date, display language, alarm thresholds, and SuperCool/SuperFrost activation memory revert to defaults each time power is interrupted because the user interface cannot save them between sessions.
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