Atlantic
Delayed Ignition
Furnace makes a loud banging or booming noise at startup.
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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
Dirty burners, Low gas pressure, Misaligned igniter, Slow-opening gas valve
How to Fix / Troubleshooting
Safety: Delayed ignition can be dangerous. If bangs are severe, shut off the furnace and gas supply and call a professional.
Steps (limited homeowner actions):
- Visual burner check: With power and gas off, inspect burners for heavy rust or debris. Do not attempt deep cleaning without proper instructions.
- Check igniter position: Ensure the hot surface igniter is properly positioned in the gas stream as per Atlantic specifications.
- Professional service: A technician should clean and adjust burners, verify gas pressure, and test the gas valve opening characteristics.
Do not: Do not continue to operate the furnace if booming persists.
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Repair Difficulty
Professional Required
5/5
Required Part
Burner Assembly
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