Hayward
Sooting / Incomplete Combustion
Soot or black staining on top of heater or around vent outlet.
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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
Blocked or undersized vent, Incorrect gas pressure or orifice size, Dirty burners, Restricted combustion air
How to Fix / Troubleshooting
Safety First: Turn off power and gas. Soot indicates a serious combustion problem and potential carbon monoxide hazard.
- Inspect vent: Check for obstructions, crushed sections, or improper vent size. Correct per Hayward and code requirements.
- Clean burners: Remove and clean burner tubes to clear rust and debris from ports.
- Check combustion air: Ensure the heater has adequate clearance and is not enclosed without proper ventilation.
- Professional combustion check: Have a qualified technician verify gas pressure, adjust combustion if possible, and confirm safe operation with an analyzer.
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Repair Difficulty
Professional Required
5/5
Required Part
Burner Assembly
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