Display shows E16 and the refrigerator may not dispense water or may show a water system error.

Safety: Unplug the refrigerator and shut off water supply before disconnecting water lines.

Steps:

• Check for basic flow: Remove the water filter and install the bypass (if provided). Try dispensing water to see if flow improves.
• Inspect dispenser tube: In models with door dispensers, check for a frozen water line in the freezer door. Gently warm the area with a hair dryer on low, keeping it moving to avoid damage.
• Test dispenser switch: With power off, access the dispenser control area and test the switch or sensor for continuity when the lever is pressed.
• Check flow sensor (if present): Some Sharp models use a small flow sensor in the water line. Inspect and replace it if it is stuck or damaged.
• Replace faulty components: Install Sharp-compatible dispenser switch, flow sensor, or thaw/replace tubing as needed.

If E16 remains and mechanical parts are good, the main control board or dispenser control module may be at fault and require professional diagnosis.