Door lock symbol flashes; E40 displayed; machine will not start

Safety first: Unplug the appliance before working on the door system.

• Verify closure: Remove any obstructions around the door seal and ensure the door is pushed firmly closed.
• Inspect hinge and latch: Check for sagging door, loose hinge screws, or a damaged latch hook. Tighten or replace components as needed.
• Test door lock: Access the lock from behind the front panel, check wiring, and test continuity of the lock coil and switch. Replace the lock if readings are out of spec.