E8 error appears and the cooker will not heat or shuts down quickly after starting.

Safety first: Unplug the cooker. The heater circuit carries mains voltage; only proceed if you are comfortable working around line voltage with the unit unplugged.

• Check for obvious damage: Remove the bottom cover and inspect the heating element ring and its wiring. Look for burnt connectors or broken spade terminals.
• Inspect board heater terminals: On the control board, locate the heater output terminals or relay. Check for cracked solder joints or discoloration. Resolder only if you are experienced with electronics.
• Continuity check (advanced): With the unit unplugged, use a multimeter to measure resistance across the heating element leads. A typical Aroma heating plate will show a low but non-zero resistance. An open reading indicates a failed element.
• Replace failed part: If the element is open, replace the heating plate assembly. If the element is good but E8 persists, the control board (relay/triac) likely needs replacement.
• Reassemble carefully: Ensure all ground wires are reattached and no wires are pinched when closing the base.
• Professional repair recommended: Because this involves mains heater circuits, many users should defer to a qualified technician.