E3 error appears, often when trying to start a pressure-cooking program; unit may beep and stop.

Safety first: Unplug the cooker and ensure there is no pressure inside before working on the lid. Open the lid only when the float valve is fully dropped.

External checks:

• Clean the lid: Remove the inner lid plate (if removable) and clean all surfaces. Food residue can trap heat and cause abnormal readings.
• Inspect the steam release and float valve: Make sure they move freely and are not clogged with starch or fat.

Lid sensor inspection (advanced):

• Remove the decorative lid cover (screws are usually on the inner side of the lid).
• Locate the lid sensor harness or flex cable that runs from the lid to the hinge area.
• Check for pinched, cracked, or broken conductors, especially where the cable bends at the hinge.
• Disconnect and reconnect the lid connector to the main board to clean the contacts.
• If accessible, test the lid NTC sensor with a multimeter for reasonable resistance at room temperature. Replace if open or shorted.

If the lid PCB or pressure sensor is integrated and not user-serviceable, replacement of the entire lid assembly is often required.