Ferroli Resonance / Gas Flow Noise

Water heater emits a whistling or high-pitched noise when running.

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

Partially blocked burner injectors, Incorrect gas pressure, Loose flue components causing resonance, Fan speed anomalies

Safety: Any unusual noise combined with smell of gas requires immediate shutdown and professional inspection.

1. Check flue stability: Ensure the Ferroli flue is securely fixed and not vibrating against structures.
2. Inspect fan: Listen for fan bearing noise; replace the fan assembly if noisy.
3. Burner cleaning: Have a technician clean burner injectors and check gas pressures.

Hard 4/5

Gas Burner Assembly

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