Sub-Zero · Refrigerator error code
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Guide · RefrigeratorFirst 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.
Guide · RefrigeratorThe 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.
Guide · RefrigeratorAn adaptive defrost board replaces the old cam timer. It counts compressor run time (and on some boards door-open time) and adjusts the next defrost interval based on how long the last one took. Test the heater and the cold bimetal first, then force a defrost: if the heater warms on a forced defrost but the coil still ices, the board isn't starting defrost on its own.
Sub-Zero · Refrigerator
10 1 02
Zone 1 cabinet thermistor unstable
Sub-Zero · Refrigerator
10 r 00
Refrigerator evaporator thermistor open
Sub-Zero · Refrigerator
10 r 02
Refrigerator evaporator thermistor unstable
Sub-Zero · Refrigerator
10 r 09
Evaporator reads warmer than cabinet
Sub-Zero · Refrigerator
15 1 01 / 15 2 01
Compressor relay reported stuck closed
Sub-Zero · Refrigerator
20 2 07
Freezer defrost under-heat