Display shows E8 and the unit will not start or stops with a beeping alarm.

Safety first: Disconnect power before manipulating the door latch or internal switch components.

• Reseat basket/door: Remove the basket or door completely and reinsert it firmly until you hear or feel a click. Ensure the inner tray is seated correctly so it does not interfere with closure.
• Inspect latch area: Look at the front frame and basket handle for broken plastic tabs or bent metal that may prevent the switch from engaging.
• Check for obstructions: Food crumbs or grease buildup can prevent the basket from sliding fully into place. Clean the rails and latch area thoroughly.
• Test switch (advanced): With the housing removed, locate the door or basket detection switch (often a small microswitch or magnetic reed switch). Manually actuate it and check continuity with a multimeter.
• Replace switch: If the switch does not change state when actuated, replace it with the correct Instant door/basket switch component.
• Inspect wiring: Verify that the switch harness is intact and firmly connected to the main control board.