Riello Combustion Air Noise / Resonance

Furnace is very noisy during operation, with whistling or high-pitched sounds from burner

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

Improper air band setting, Resonance in air intake piping, Partially blocked air intake, Worn or damaged fan wheel

Safety: Turn off power before opening burner housing.

Steps:

Inspect intake: Ensure the air intake is not partially blocked and that screens are clean.
Check fan wheel: Inspect the Riello fan wheel for damage or imbalance. Replace if cracked or bent.
Adjust air band slightly: Small adjustments to the air band may reduce noise, but final settings must be verified with combustion instruments.

Hard 4/5

Combustion Fan Wheel

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