How to Fix / Troubleshooting

Safety first: Turn off gas and power. Sooting indicates dangerous combustion conditions and potential carbon monoxide production.

Inspect air openings: Ensure all combustion air openings on the Thermeau cabinet are clear of debris, vegetation, or snow.
Check exhaust clearance: Verify that the exhaust outlet is not blocked and that venting meets Thermeau specifications.
Clean burners: Remove the burner tray and clean burner ports and orifices. Do not enlarge orifices.
Gas pressure and combustion test: Have a qualified technician measure gas pressure and perform a combustion analysis to adjust or correct issues.
Do not operate until corrected: Leave the heater off until a professional confirms safe combustion.

Heater produces soot or black staining on the exhaust outlet or nearby surfaces.

Possible Causes