Slant/Fin
Combustion Noise / Improper Combustion
Boiler emits rumbling or roaring 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 pressure, Dirty burner on Slant/Fin boiler, Blocked vent or inadequate combustion air, Misaligned burner orifice
How to Fix / Troubleshooting
Safety: Turn off gas and power. Combustion issues can lead to carbon monoxide and fire hazards.
Steps:
- 1. Inspect burner: Remove burner access panel and visually inspect for soot, rust, or debris. Do not attempt to adjust orifices without training.
- 2. Check combustion air openings: Ensure boiler room vents or combustion air ducts are not blocked.
- 3. Vent inspection: Verify venting is intact and not restricted.
Professional adjustment: A licensed technician must check gas pressure, clean the burner, and set combustion using an analyzer.
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Repair Difficulty
Professional Required
5/5
Required Part
Gas Burner Assembly
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