Washer-dryer combo displays E10 and will not start; control panel may be unresponsive or partially functional.

Safety first: Unplug the appliance before removing the control panel or top cover. Static discharge can damage electronics; ground yourself before touching boards.

• Power reset: Disconnect power for at least 5 minutes, then plug back in to see if the error clears.
• Inspect control connections: Remove the top cover and control panel to access the display PCB and main PCB. Check all ribbon cables and harness connectors for secure fit.
• Look for damage: Examine both boards for burn marks, swollen components, or corrosion from moisture.
• Check line voltage: Ensure the outlet provides stable voltage within the range specified in the manual. Avoid using undersized extension cords.
• Board replacement: If connectors are secure and no simple wiring issue is found, the main control board is the most common failure. Replace with a Costway-compatible PCB. If the display remains dead, the user interface board may also need replacement.
• Professional service: If you are not comfortable working with electronics, contact a qualified technician for diagnosis and board replacement.