Microwave shows E10 and beeps; door appears closed but unit refuses to start.

Safety first: Unplug the microwave before any physical adjustment.

Door alignment checks:

• Inspect the door from the front: gaps should be even on all sides and the door should close flush with the cabinet.
• Open the door and examine the plastic latch hooks; they should be straight and spring back when pressed.
• Check for food debris or grease buildup around the latch area and clean with a damp cloth.

Hinge and latch inspection (experienced users):

• With the unit unplugged, gently lift the door up and down to feel for excessive play in the hinges.
• If the door sags, hinge screws or brackets may be loose; tighten accessible screws carefully.
• Remove the outer cover and inspect the latch bracket and door sensing switch for cracks or misalignment.
• Replace the latch assembly if broken or warped.

After adjustments: Reassemble, plug in, and test door operation. If E10 persists, a door switch or control board input may be faulty and should be checked by a technician.