Liebherr · Refrigerator error code

BT011Refrigerator compartment air (newer controls) sensor fault

Cross-checked Power off, standard tools

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Related diagnostic guides

Guide · Refrigerator

Premium built-in refrigerator: one section warm (Sub-Zero vs. Monogram logic)

Start by knowing the architecture. Sub-Zero built-ins have two separate sealed systems, so a warm section means a fault in that section's own fan, defrost, sensor or system. Monogram built-ins share one freezer evaporator and feed fresh food through a damper, so a warm fresh-food side with a cold freezer points at the damper, airflow or an iced return passage.

6 steps ~60 minmoderate

Guide · Refrigerator

Refrigerator runs all the time

First decide if it's really a problem. Whirlpool says 40-80% run time is normal at average room temperature, and newer variable-speed compressors are designed to run long at low speed. If it's truly excessive, the usual causes are heat-rejection problems (dirty condenser, dead condenser fan), air leaks (gaskets, doors) and a frosted evaporator. A compressor or refrigerant fault is a referral.

8 steps ~45 mineasy

Guide · Refrigerator

Field pattern: fridge warm? Read the evaporator frost and check the fan before blaming the compressor

The evaporator coil tells you which system failed. A coil packed with ice means a defrost failure (the sealed system is fine); a light, even frost with no air moving means a fan problem; frost on only the first part of the coil, or none at all with the compressor running, points to the sealed system. Condemning the compressor without looking at the coil is the common wrong turn.

7 steps ~45 minmoderate