Washer-dryer combo fills and drains but drum does not rotate during wash or spin on Xiaomi washer-dryer combo.

Safety first: Unplug the appliance before removing the rear panel.

• 1. Check for error codes: Even if none are displayed, note any flashing lights or patterns and consult the manual.
• 2. Inspect drive belt (if applicable): Remove the rear panel and verify the belt is intact and tensioned between the motor and drum pulleys. Replace if broken or badly worn.
• 3. Test drum by hand: Rotate the drum manually. If it moves freely, focus on motor and electronics; if stiff, investigate mechanical binding.
• 4. Motor and inverter diagnosis: These require electrical testing and are best handled by a professional. If the belt is fine and no obvious obstruction exists, schedule service to test the Xiaomi motor and control board.