Washer-dryer combo displays E17 and will not start; often related to child lock or safety interlock.

Safety first: Ensure the appliance is stationary and not mid-cycle before attempting resets.

Step-by-step checks:

• Disable child lock: Refer to the user manual for the specific key combination (commonly holding two buttons for several seconds). Hold the indicated buttons until the lock symbol disappears.
• Check buttons: Press each control button to ensure none are stuck or unresponsive. Clean around buttons to remove detergent residue.
• Power cycle: Unplug the machine for 5–10 minutes, then reconnect and test.

If E17 persists and the lock cannot be cleared, the user interface PCB or main control board may require replacement by a technician.