The furnace makes a loud banging or booming noise at startup.
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.
Possible Causes
How to Fix / Troubleshooting
Safety: Delayed ignition can be dangerous. If the booming is severe, shut off gas and power and call a professional.
Steps to check (basic):
- Visual burner check: With power and gas off, remove burner access and inspect burners for heavy rust or debris.
- Filter and airflow: Ensure proper airflow to avoid incomplete combustion.
When to call a professional: Burner removal, cleaning, and gas pressure adjustment must be performed by a qualified technician to prevent explosion hazards.
Repair Difficulty
Required Part
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