Ruud
Flame Proving / Flame Stability Issue
Boiler ignites but shuts down after a few seconds; may retry several times
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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 flame sensor, poor burner grounding, incorrect gas/air mixture, partially blocked burner
How to Fix / Troubleshooting
Safety first: Turn off power and gas before accessing the burner compartment.
- Clean flame sensor: Remove and gently clean the flame sensor rod with fine abrasive pad. Reinstall in the correct position.
- Check ground connections: Ensure burner and control ground wires are tight and free of corrosion.
- Inspect burner: Look for rust flakes or debris on the burner surface. Vacuum gently without altering burner ports.
- Professional combustion check: If the problem persists, a technician should verify gas pressure and combustion with proper instruments.
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Repair Difficulty
Medium
3/5
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