Dryer shows E20 and will not start; child lock symbol may be lit.

Safety first: No internal work is required initially; keep the dryer plugged in for control reset steps.

• Disable child lock: Refer to the user manual for the specific key combination (often holding two buttons for several seconds) to toggle the child lock off.
• Check buttons: Press each button firmly to ensure none are stuck or jammed. Clean around the buttons to remove dirt or detergent residue.
• Power reset: Turn off the dryer at the mains for 5 minutes, then restore power to reset the control electronics.
• UI board check: If E20 persists and buttons are responsive, the user interface board or main control PCB may be faulty and require replacement.