Beretta
Acoustic Noise from Fan or Gas Valve
Water heater emits a high-pitched whine or humming during operation
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Safety Warning
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.
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Possible Causes
Worn fan bearings, Resonance in flue system, Vibrating gas valve coil, Loose mounting screws
How to Fix / Troubleshooting
Safety: Turn off power before touching internal components.
- 1. Identify noise source: Remove the front cover (if allowed by the manual) and briefly run the unit to localize the noise (fan area, gas valve, or pipework).
- 2. Tighten fixings: Check and tighten screws on the fan bracket, gas valve, and nearby panels.
- 3. Inspect fan: If the noise clearly comes from the fan and changes with speed, the fan bearings may be worn and the fan assembly should be replaced.
- 4. Flue resonance: A technician can check flue supports and configuration to reduce resonance and vibration.
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Repair Difficulty
Medium
3/5
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