Liebherr Temperature Alarm

Liebherr error code TEMPERATURE ALARM indicates: Liebherr BioFresh / BluPerformance / Monolith / NoFrost Premium Refrigerator & Wine Cellar: Diagnostic fault code Temperature Alarm registered by the microcomputer controller. Critical temperature acoustic warning; interior temperature above safety.

The primary root cause for Liebherr code TEMPERATURE ALARM is: On Liebherr appliances engineered with BioFresh climate chambers, BluPerformance base refrigeration module, DuoCooling dual refrigerant circuits, and VCC inverter compressor with 4.7 kΩ NTC thermistors: interior compartment temperature elevated Metrological tolerance verification: nominal NTC thermistor 10.0 kΩ at 25°C, 2.5 kΩ at 60°C..

To resolve error code TEMPERATURE ALARM: Disconnect mains power before servicing. Unplug the harness at the main PCB and use a calibrated digital multimeter: measure sensor resistance across 2-pin harness connector (expected ~10 kΩ at 25°C). Inspect contacts for pin oxidation or loose terminals. Replace defective part if out of tolerance, re-energize and clear error: Turn appliance on. Hold SuperFrost (or Alarm) for 5 seconds until 'c' or 'C' menu appears. Press Up/Down to navigate to '0' or 'rS', then press SuperFrost for 3 seconds to clear the fault log and exit service test mode.

Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if Liebherr code TEMPERATURE ALARM persists, the physical component causing On Liebherr appliances engineered with BioFresh climate chambers, BluPerformance base refrigeration module, DuoCooling dual refrigerant circuits, and VCC inverter compressor with 4.7 kΩ NTC thermistors: interior compartment temperature elevated Metrological tolerance verification: nominal NTC thermistor 10.0 kΩ at 25°C, 2.5 kΩ at 60°C. must be inspected or replaced.

Set a digital multimeter to ohms (Ω). Disconnect power and test Compressor Motor Windings (Run/Start) & Defrost Heater across Across 3 compressor pins (Common, Run, Start): R(C-S) + R(C-R) = R(S-R). Winding to earth: >20MΩ (OL).. Expected nominal reading is 15Ω–25Ω (Run C-R), 20Ω–35Ω (Start C-S), 200Ω–400Ω (Defrost Heater). PTC Relay: 10Ω–30Ω at 25°C.. Tolerance: ±10%. Any low insulation resistance to casing (<2MΩ) trips the breaker. Defrost bimetal reads <0.5Ω when sub-zero..

Standard electrical safety protocol: 1. Disconnect 230V mains power before opening panels. 2. Verify zero voltage at test points. 3. Allow hot water or heating elements to cool below 30°C before handling.