Dishwasher shows F5E1 and will not start; door appears closed but control thinks it is open.

Safety first: Turn off power at the breaker.

• Check door closure: Close the door firmly and listen for a solid latch click. If the door feels loose or does not latch, inspect the latch and strike.
• Inspect latch assembly: Remove the inner door panel to access the latch and door switch. Look for broken plastic parts or misalignment.
• Test door switch: Disconnect the switch and test for continuity with the door latched and unlatched. It should change state reliably.
• Adjust strike: Slightly adjust the strike plate position (on the tub frame) if the latch is not engaging fully.

Repair action: Replace the door latch/switch assembly if it fails continuity tests or is physically damaged. Ensure the door closes squarely and seals properly after repair.