IceKing ice maker displays E16; unit may run but produce very small or hollow ice cubes.

Safety first: Unplug the ice maker and close the water supply valve before disconnecting any water lines.

Step-by-step checks:

• 1. Confirm water pressure: Ensure the supply line is connected to a cold water source with adequate pressure (typically 20–120 psi). Avoid self-piercing saddle valves.
• 2. Inspect supply line: Look for kinks or crushed sections in the water supply line. Replace if damaged.
• 3. Clean inlet screen: Disconnect the line at the water inlet valve and clean the mesh screen of any sediment.
• 4. Flush line: Run water from the disconnected line into a bucket to clear debris.
• 5. Evaluate valve performance: If flow to the valve is strong but the unit still under-fills, the valve may not be opening fully and should be replaced.

When to call a technician: If plumbing modifications are needed or if you suspect internal scaling beyond the valve, professional service is recommended.