Ice cubes are hollow, small, or cloudy; ice production is slow.

Safety first: Turn off water supply before removing any water lines.

Step 1 – Replace water filter

• Install a new OEM Sub‑Zero water filter if it is older than recommended.
• Flush several gallons of water through the dispenser to clear air and carbon fines.

Step 2 – Check shutoff valve and pressure

• Ensure the saddle or ball valve feeding the refrigerator is fully open.
• If other fixtures in the home also have low pressure, address the plumbing issue.

Step 3 – Inspect inlet valve for restriction

• Remove the water line at the inlet valve and check the screen for debris.
• Clean or replace the water inlet valve if clogged or corroded.