Aquacomfort Sooting / Incomplete Combustion

Heater produces soot, black staining on the cabinet, or dark exhaust.

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

Blocked burner air openings, Incorrect gas/air mixture, Blocked heat exchanger flue passages, Wrong gas orifice size

Safety first: Turn off gas and power. Sooting can indicate dangerous carbon monoxide production.

Inspect burners: Remove the burner tray and check for rust, debris, or spider webs blocking air openings. Clean thoroughly with a soft brush and compressed air.
Check venting: Ensure the exhaust vent is not restricted and meets Aquacomfort installation guidelines.
Do not operate: Do not run the heater again until a qualified technician has checked combustion, gas pressure, and orifice sizing.

Professional Required 5/5

Burner Assembly

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