Ariston Fan or Pump Noise / Resonance

Furnace emits a high-pitched whine or humming noise during operation.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Worn fan bearings, Cavitating pump, Loose mounting brackets, Vibrating flue

Safety: Turn off power before touching moving parts.

Identify source: Listen near the flue fan, circulation pump, and casing panels to locate the noise.
Tighten panels and brackets: Tighten any loose screws on the casing, pump brackets, and flue supports.
Check pump for air: Bleed the pump and system to remove air that can cause cavitation noise.
Fan inspection: If the flue fan is noisy or rough when spun by hand, it may need replacement by a technician.

Medium 3/5

Flue Fan Assembly

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