E13 appears; unit may not drain properly at the end of the cycle, leaving standing water in the tray.

Safety first: Disconnect power and be prepared for water spillage when opening the drain area.

• Inspect drain area: Remove the front or bottom panel to access the drain tray and any associated switches or sensors.
• Check for corrosion: Look at the microswitch or sensor terminals for rust or mineral deposits. Clean lightly with contact cleaner if minor.
• Test switch function: Actuate the switch manually and test continuity with a multimeter. Replace if it does not open and close properly.
• Check harness: Follow the wires back to the control board, looking for cuts or pinched sections.
• Replace sensor/switch: If the component fails testing, install a new drain sensor or end‑of‑cycle switch and secure it in the original position.