Induction cooktop shows F14 and all zones shut down simultaneously.

Safety first: Turn off power at the breaker and verify with a tester that the cooktop is de-energized before opening any covers. High-voltage components can be dangerous.

• Check mains connections: Remove the cooktop from the counter if necessary and open the terminal block cover. Ensure all live, neutral, and earth connections are tight and correctly wired according to the DeLonghi wiring diagram.
• Verify supply voltage: Use a multimeter to confirm that the supply voltage matches the rating on the cooktop data plate. Significant deviations can trigger F14.
• Inspect internal fuses: With the bottom cover removed, locate any inline fuses on the induction power module. Replace only with identical type and rating if blown, and investigate for underlying shorts.
• Look for visible damage: Check the power module for burnt components, cracked solder joints, or bulging capacitors.
• Professional repair: If F14 persists after verifying wiring and supply, the induction power module is likely defective and should be replaced by a qualified service technician due to the complexity and safety risks.