Smell of gas near the water heater, especially during operation or shortly after.

Critical safety: If you smell gas, do not operate electrical switches, do not use open flames, and ventilate the area immediately. Shut off the gas supply at the main valve and evacuate if the smell is strong.

• 1. Turn off gas: Close the gas isolation valve to the Ferroli heater.
• 2. Ventilate: Open windows and doors to disperse gas.
• 3. Do not attempt repairs: Gas leaks must be located and repaired by a licensed gas technician using leak detection equipment.
• 4. Check combustion seals (technician): A professional should inspect burner gaskets, flue seals, and gas connections and replace any defective parts.