Display shows L0 or LO and the unit will not start; sometimes accompanied by a beeping sound.

Safety first: Unplug the unit before manipulating internal switches.

Basic checks:

• Remove the basket and reinsert it firmly until you hear or feel a click. Some T-fal models require the basket to be fully seated to close the interlock.
• Inspect the basket handle and latch for cracks or deformation that might prevent full engagement.

Interlock switch inspection:

• With the unit unplugged, locate the basket safety switch (usually near the front where the basket slides in).
• Press the switch manually and listen for a distinct click. If there is no click or it feels mushy, the microswitch may be defective.
• Check for a small magnet in the basket handle (on models using a reed switch). Ensure it has not fallen out.
• Test the switch with a multimeter for continuity when pressed. Replace the basket interlock switch if it does not change state.
• Inspect and reseat the switch wiring connector on the main PCB.

Never bypass the safety interlock permanently; it is designed to prevent operation with the basket removed.