Diagnosis
The ice maker's 'full' sensor arm is manually locked in the up position. This halts the ice making cycle. It can be triggered by a jammed ice bucket or a faulty sensor.
How to Fix It
First, remove the ice bucket. Check for ice cubes jammed in the mechanism or bucket track. Clear any obstructions. Manually lower the metal shut-off arm to the down position. Press and hold the 'Test' button on the ice maker for 3 seconds. You should hear a chime and see the ice maker cycle. Return the bucket. Ensure it is seated fully, pressing the arm down.
If That Didn't Work
The ice maker itself may have failed. Check for power. The freezer must be at or below 15°F (-9°C) for the ice maker to operate. Use a thermometer. If temperature is correct, the ice maker motor module (part # DA97-12037A) may be defective.
Heads Up
The ice maker has a built-in heater to aid ice release. If this heater fails, ice will freeze to the tray and cause a jam. Listen for a faint humming during the harvest cycle; its absence indicates heater failure.