Fondital
Combustion Resonance / Gas Flow Noise
Water heater makes a whistling or howling noise 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
Incorrect gas/air ratio, Partially blocked burner ports, Loose flue components, Fan speed out of calibration
How to Fix / Troubleshooting
Safety: Noise may indicate combustion issues; have it checked promptly.
- Visual inspection: Check that the flue is properly assembled and all joints are tight.
- Burner cleaning: Clean burner ports to remove deposits that can cause whistling.
- Combustion setup: A technician should check CO₂/O₂ levels and adjust gas valve and fan speed parameters according to Fondital guidelines.
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Repair Difficulty
Hard
4/5
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