Generic "Err" or "Error" message on display; cooker beeps and refuses to start any program.

Safety first: Unplug the multicooker before touching the control panel internals.

• Power cycle: Unplug the unit for 10–15 minutes, then plug back in and check if the error clears.
• Dry the control area: If the panel was recently exposed to steam or liquid spills, let the unit air dry for several hours in a warm, dry location (away from direct heat sources).
• Inspect panel connections (advanced): Remove the outer housing to access the control panel. Reseat any ribbon cables between the keypad/display and main board.
• Check for corrosion: Look for signs of moisture damage or corrosion on the panel PCB. If present, the panel or main board may need replacement.
• Factory reset (if supported): Consult the Nesco manual for any key combination that performs a factory reset and try it after drying and reseating connectors.

Warning: If the error persists after basic steps, avoid further disassembly unless you are experienced with electronics; contact a service professional.