Sub-Zero · Refrigerator error code
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Guide · RefrigeratorStart 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.
Guide · RefrigeratorA new heater fixes nothing if something else stops it from turning on or the melt water cannot leave. Techs trace repeat freeze-ups to the defrost thermostat or evaporator sensor, the timer or defrost control, a frozen drain or drain trough, heaters installed in the wrong position, or warm humid air from a bad door seal. The wrong turn is replacing the heater a second time.
Guide · RefrigeratorSwings usually come from a frosted evaporator (defrost failing), a sticking damper, or a sensor problem. Check frost first, then damper and thermistor.
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