Ruud
Delayed Ignition
Furnace makes loud booming or banging noise at startup when burners ignite.
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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 causing gas buildup, Misaligned burner orifice, Low or inconsistent gas pressure, Weak hot surface ignitor
How to Fix / Troubleshooting
Safety: Delayed ignition can damage the heat exchanger. Shut off the furnace and have it inspected if the noise is severe.
Steps to check (limited homeowner scope):
- Visual burner inspection: With power and gas off, remove burner access panel and inspect burners for rust, debris, or misalignment.
- Do not attempt major burner adjustments: Burner removal and cleaning should be performed by a qualified technician familiar with Ruud furnaces.
- Schedule service: Request burner cleaning, gas pressure check, and ignitor inspection from a licensed HVAC technician.
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Repair Difficulty
Professional Required
5/5
Required Part
Burner Assembly
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