E7 appears when trying to start a program, often accompanied by no heating.

Safety first: Unplug the cooker and let it cool. Do not touch internal wiring with power connected.

• Visual inspection under pot: Remove the inner pot and inspect the heating plate for burn marks or deformation. Severe discoloration can indicate heater damage.
• Check for rattling: Gently shake the unit; a broken heater plate may rattle. If you hear loose metal, discontinue use.
• Bottom cover inspection (advanced): With the unit unplugged, remove the bottom cover. Look for burnt wires or disconnected spade terminals on the circular heating element. Reseat any loose connectors firmly.
• Continuity test (for experienced users): Using a multimeter, test continuity across the heater terminals. An open reading indicates a failed heating element that must be replaced.

If the heating element is open or wiring is burnt, replace the heating plate assembly or wiring harness with the correct Tristar parts. If the heater tests good, the heater relay or PCB is likely faulty and requires professional repair.