E15 error; machine reports door or service panel open even when closed.

Safety: Unplug the machine before adjusting door components.

• Check closure: Open and firmly close the service door several times. Ensure nothing obstructs the latch.
• Inspect latch: Examine the plastic latch on the door and the catch on the chassis for cracks or wear. Replace damaged parts.
• Test switch: Access the door switch behind the panel. Manually press it and listen for a clear click. Test continuity with a multimeter; replace if it does not change state.
• Adjust alignment: If the door is sagging, adjust hinges or mounting screws so the latch engages the switch correctly.