Wolf induction cooktop displays E18 and one or more zones shut down when multiple burners are used at high power.

Safety first: Turn off power at the breaker. Verify power is off before opening the junction box or terminal area.

• Verify supply voltage: Using a multimeter (by a qualified person), check that the cooktop is receiving the correct voltage per the rating plate (typically 240 V or 208 V). Incorrect voltage can trigger E18.
• Inspect terminal block: Access the cooktop's electrical junction. Tighten all lugs and inspect for heat damage or discoloration. Replace any burned components.
• Load management: Avoid running all zones at maximum power simultaneously. Use the Power Boost feature sparingly and not on multiple zones at once.
• Module evaluation: If supply and connections are correct but E18 persists, the internal power management circuitry may be faulty and the power module should be replaced by a technician.