How to Fix / Troubleshooting

Safety first: Unplug the refrigerator before removing interior panels or handling wiring.

dS points to a problem with the defrost temperature sensor (thermistor).

Locate thermistor: Remove the freezer rear panel to access the evaporator. The thermistor is usually clipped to the evaporator tubing in a small plastic housing.
Inspect physically: Check for broken wires, corrosion at the connector, or a thermistor that has fallen out of its clip.
Test resistance: With the thermistor at a known temperature (e.g., in ice water at 32°F/0°C), measure resistance and compare to GE specifications. Replace if readings are far off.
Check harness to board: Trace the thermistor wires to the main control board and ensure the connector is fully seated and not damaged.
Board diagnosis: If a new thermistor does not clear the dS error, the main control board may not be reading the sensor correctly and should be evaluated by a technician.

Display shows dS and defrost performance is abnormal (either too much frost or excessive defrosting).

Possible Causes