Display shows E1 and cooker will not start or immediately beeps and cancels the program.

Safety first: Unplug the multicooker before inspecting the lid or internal parts. Never attempt repairs while the unit is connected to power.

• Check lid closure: Open and firmly close the lid. Make sure the lid is aligned with the body and that the handle is fully down. On many Cuisinart multicookers, the lid must be rotated and pressed until you hear or feel a click.
• Inspect lid lock mechanism: Look at the metal or plastic tab on the lid that engages the body. Ensure it is not bent, cracked, or obstructed by food residue. Clean the area with a damp cloth and dry thoroughly.
• Check lid position switch area: On the body rim, locate the small slot or switch that the lid tab presses. Use a flashlight to confirm there is no debris blocking it. Gently press it with a non-metallic tool to ensure it moves freely.
• Power reset: With the unit unplugged for at least 5 minutes, plug it back in and try a simple program (e.g., Sauté) with the lid open and then closed to see if the error clears.
• If E1 persists: The lid position switch or its wiring may be faulty. Do not bypass the switch. Contact a qualified appliance technician or Cuisinart support for lid switch or control board diagnosis and replacement.