Dishwasher shows F1 and will not start; may beep repeatedly.

Safety first: Disconnect power before adjusting mechanical parts.

• Check for obstructions: Ensure racks are fully pushed in and no large items are preventing the door from closing.
• Inspect hinges: Check that the door is level and not sagging. Adjust the cabinet or hinges if necessary.
• Test latch engagement: Close the door firmly and listen for a solid click. If the latch feels loose, the Sharp latch assembly may be worn.
• Replace latch/switch: Remove the inner door panel and replace the door lock/switch assembly if it is physically damaged or not actuating.