Ariston water heater vibrates excessively or makes humming noises when heating.

Safety first: Turn off power and water before tightening mounts.

• Check mounting brackets: Ensure all wall brackets and screws are tight and anchored into solid structure.
• Secure piping: Add pipe clamps or supports to reduce vibration in inlet and outlet lines.
• Bleed air: Open hot taps to remove trapped air that can cause noise.
• Inspect internal components: Verify that the element, thermostat, and wiring harnesses are firmly fixed and not rattling against the casing.