Sub-Zero · Refrigerator error code

95 1 01Refrigerator compressor control signal stuck on

Cross-checked High-voltage / caution

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Related diagnostic guides

Guide · Refrigerator

Field pattern: new inverter board, compressor still won't run (check signal and compressor electrically, then refer)

The inverter board only drives the compressor when it has line power, a run signal from the main board and a compressor with sound windings. Forum threads describe owners swapping two or more inverter boards before anyone checked the compressor or the signal. The wrong turn is a second board without checking supply, signal, windings and case ground; a bad compressor is sealed-system work and gets referred.

6 steps ~60 minadvanced

Guide · Refrigerator

Adaptive defrost control (ADC) board: how to diagnose it

An 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.

8 steps ~60 minmoderate

Guide · Refrigerator

Field pattern: Sub-Zero built-in warm, running nonstop or service light on (clean the condenser before any sealed-system call)

On Sub-Zero units the condenser sits behind the top grille (or the kickplate on undercounter models) and loads up with dust and pet hair; the service indicator generally means a compressor is running too long to hold temperature. The common wrong turn is quoting a sealed-system repair or a board before the condenser has been properly cleaned, the condenser fan confirmed and the unit given a full day to recover.

7 steps ~45 mineasy

More Sub-Zero refrigerator codes

Sub-Zero · Refrigerator

10 1 02

Zone 1 cabinet thermistor unstable

Cross-checked High-voltage / caution

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10 2 00

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Sub-Zero · Refrigerator

10 2 01

Freezer cabinet thermistor shorted

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10 7 00

Ambient (on control board) thermistor open

Cross-checked

Sub-Zero · Refrigerator

10 7 01

Ambient (on control board) thermistor shorted

Cross-checked

Sub-Zero · Refrigerator

10 7 02

Ambient (on control board) thermistor unstable

Cross-checked