Whirlpool refrigerator ice maker shows F5 and ice cubes are very small or hollow

Safety: Turn off water supply before disconnecting any lines.

• Replace water filter: Install a new Whirlpool-approved filter and flush several gallons of water through the dispenser.
• Inspect saddle valve: If a self-piercing saddle valve is used, consider replacing it with a full-bore shutoff valve. Ensure it is fully open.
• Clean inlet screen: Disconnect the water line at the refrigerator inlet valve and clean the small screen filter.
• Check pressure: Confirm that water pressure at the refrigerator is at least 30–40 psi. If pressure is low, correct the plumbing issue.
• Monitor ice size: After corrections, allow several cycles for ice size to normalize. If F5 persists, the control may be misinterpreting fill time and could require service.