Vokera Sooting / Poor Combustion

Furnace flue terminal shows signs of black soot or staining

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, Incorrect gas/air ratio, Blocked heat exchanger, Flue restriction

Safety: Sooting indicates potentially dangerous combustion. Turn off the furnace and gas supply and do not use it until checked.

Do not clean flue yourself: Internal combustion components and flue must be serviced by a qualified gas engineer.
Report symptoms: Inform the technician about any noises, smells, or recent changes in operation.
Annual servicing: Ensure the Vokera furnace is serviced annually to prevent recurrence.

Professional Required 5/5

Primary Heat Exchanger and Burner

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