How to Fix / Troubleshooting

Safety first: Do not repeatedly reset the breaker. Turn off power and water supply.

Check for leaks: Inspect around the element flange, anode, and T&P valve for leaks that may be dripping onto wiring. Repair leaks first.
Test element: Measure resistance between each element terminal and ground. Any continuity indicates a ground fault—replace the element.
Inspect wiring: Look for nicks, crushed cables, or melted insulation. Replace damaged sections.
Dry the unit: If moisture is present, dry thoroughly before retesting.

If the breaker still trips with a dry unit and new element, the control board may be faulty and should be replaced by a technician.

Ariston water heater trips the circuit breaker or RCD/GFCI when heating.

Possible Causes