Washer-dryer combo displays E11 and stops; often associated with water remaining in the tub or failure to advance cycles.

Safety first: Unplug the appliance before removing any control panels. Static discharge can damage electronic boards; ground yourself before handling.

Step-by-step checks:

• 1. Power reset: Disconnect power for 5–10 minutes, then restore. Sometimes transient communication faults clear with a reset.
• 2. Inspect control connections: Remove the top panel and control console. Locate the ribbon cable or harness between the user interface (display) board and the main control board. Reseat all connectors firmly.
• 3. Check for moisture or corrosion: Look for signs of moisture intrusion, detergent residue, or corrosion on the control boards and connectors. Dry and clean gently if needed.
• 4. Visual inspection of boards: Examine both boards for burned components, cracked solder joints, or physical damage.
• 5. Replace suspect board: If one board shows obvious damage, replace it with an OEM Monogram control board. In some cases, both boards may need replacement and programming.

When to call a technician: Communication errors can be complex. If reseating connectors does not resolve E11, professional diagnosis with Monogram service tools is recommended.