Washer-dryer shows E31 and may not start or may behave erratically with water levels on Xiaomi combo washer-dryer.

Safety first: Unplug the appliance before removing the top cover.

• 1. Access pressure sensor: Remove the top panel and locate the Xiaomi pressure sensor connected to a small hose from the tub.
• 2. Check hose and connector: Ensure the hose is firmly attached and not cracked. Verify the electrical connector is fully seated.
• 3. Inspect for moisture: If moisture is present on the sensor or connector, dry thoroughly and check for leaks from the tub or hose.
• 4. Replace sensor if needed: If E31 persists, replace the Xiaomi pressure sensor with an identical part. This usually involves one screw and swapping the hose and connector.
• 5. If error remains: The main control board may be misreading the sensor. Professional board diagnosis is recommended.