Soot or black staining visible around the flue outlet or on the heater cabinet.
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: Turn off power and gas. Soot indicates dangerous combustion conditions and potential carbon monoxide production.
Steps:
- Check vent and intake: Ensure both are clear of obstructions and installed per Lochinvar guidelines.
- Inspect burner area: Look for heavy rust, debris, or misaligned burners. Do not attempt to adjust gas orifices yourself.
Combustion analysis, burner cleaning, and gas pressure adjustment must be performed by a qualified technician with proper instruments.
Repair Difficulty
Required Part
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