What High Temperature Alarm Means
This alarm sounds and flashes on the display when either the fresh-food or freezer compartment has stayed above its safe temperature threshold for longer than the unit allows — Liebherr units use this alarm instead of a numbered fault code for temperature problems.
Common Causes of High Temperature Alarm
- Door left open or not sealing fully closed
- Large amount of warm food loaded at once
- Failed temperature sensor or compressor fault if the alarm persists after a full recovery period
🔧 One Safe Check You Can Try
Check whether the door was recently left ajar or a large amount of warm food was just loaded — if so, silence the alarm and give the unit a few hours to recover before assuming a fault.
⚠ Why You Shouldn't Go Further Than That
- Sensor and compressor wiring share space with refrigerant lines, and probing the wrong wire while troubleshooting can trigger a bigger, costlier fault.
- A misdiagnosed sensor swap that doesn't address the real cause leaves the unit running warm longer, risking the food inside.
- Sensor housings are typically mounted near refrigerant lines — physical damage while reaching one can create a refrigerant leak.
- Refitting a sensor incorrectly can produce different, more confusing alarm behavior the next time it triggers.
- Opening interior panels to access the sensor or compressor typically voids the remaining parts warranty on the unit.