Etna induction cooktop displays E3 and refuses to start or shuts down during cooking.

Safety: Only check live voltage if you are trained and have proper tools. Otherwise, call a qualified electrician.

• Verify wiring configuration: Compare the connection at the Etna terminal block with the wiring diagram on the appliance label (single-phase vs. two/three-phase). Correct any miswiring.
• Check for loose connections: With power off, tighten all terminal block screws and inspect for heat damage.
• Measure supply voltage: With a multimeter, confirm that the supply voltage matches the rating on the data plate (typically ~230V). Large deviations can trigger E3.
• Use a surge protector: If your area has unstable power, consider a dedicated surge protector or voltage stabilizer.
• Persistent E3 with correct voltage: The internal power supply on the main control/power module may be defective and require replacement.