Display shows E18 and the refrigerator may show abnormal humidity control or condensation issues in special drawers.

Safety: Unplug the refrigerator before removing drawer covers or panels.

Steps:

• Locate the humidity sensor: In Sharp models with humidity-controlled drawers, the sensor is often integrated into the drawer cover or side wall.
• Inspect for moisture: Remove the cover and check for water intrusion or condensation around the sensor. Dry the area thoroughly.
• Check connections: Ensure the sensor connector is firmly seated and wires are intact.
• Test the sensor: With power off, measure resistance across the sensor terminals (if service data is available). Replace if readings are out of specification.
• Replace sensor module: Install a Sharp-compatible humidity sensor or drawer cover assembly as required.

If E18 continues, the main control board may not be interpreting the sensor correctly and may need replacement by a technician.