E17 appears and the cooker may heat uncontrollably or overshoot temperature before shutting down.

Safety first: Immediately unplug the cooker if you suspect uncontrolled heating. Do not use until repaired.

• Visual inspection: Open the base and inspect the heater relay and surrounding area for signs of overheating or melting.
• Continuity test: With the cooker unplugged, disconnect one heater lead and measure resistance between the heater terminal and mains input. Unexpected continuity may indicate a shorted triac or welded relay.
• Replace relay/triac: If the relay contacts are welded or the triac is shorted, replace the component or the entire main PCB.
• Check wiring: Ensure no wires are shorted together or bypassing the control circuit due to insulation damage.
• Functional test: After repair, run a monitored test with water, ensuring the heater cycles on and off correctly and E17 does not reappear.