Multicooker will not start a program and displays E0 immediately after pressing Start.

Safety first: Unplug the T-fal multicooker before any inspection. Never bypass safety switches during cooking.

Step-by-step checks:

• Check lid closure: Open and close the lid firmly. Make sure the hinge is fully seated and the lid lock tongue engages the body. Try starting a program again.
• Inspect for obstructions: Look around the lid latch area for food debris, dried sauce, or warped silicone that may prevent full closure. Clean with a damp cloth and mild detergent, then dry thoroughly.
• Check the lid switch actuator: On many T-fal multicookers, a small plastic tab or protrusion on the lid presses a microswitch in the body. With the unit unplugged, gently press the switch with a non-metal tool and listen for a click. If the tab on the lid is broken, the switch will not be actuated.
• Test the switch (advanced): Remove the top cover (usually several screws under the lid rim). Locate the lid microswitch and check continuity with a multimeter while pressing it. Replace the switch if it does not change state.
• Inspect wiring: Look for loose connectors or damaged wires between the lid switch and the main control board. Reseat any loose plugs firmly.

When to stop: If the plastic lid mechanism is cracked or the switch is soldered directly to a PCB and you are not comfortable with electronics, reassemble the unit and contact a qualified technician or T-fal service.