Junkers Flue Gas Recirculation / Ventilation Problem

Burner runs but there is a strong smell of combustion or fumes near the heater.

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

Leaking flue joints, Blocked flue terminal, Missing or damaged combustion chamber gasket, Inadequate room ventilation (for open-flue models)

Safety: This can be life-threatening due to carbon monoxide. Turn off the heater immediately and ventilate the area.

Do not use the heater: Keep the appliance off until inspected.
Check visible flue parts: Look for disconnected or damaged flue pipes and seals.
Ventilation: Ensure ventilation grilles are not blocked by furniture or covers.
Call a professional: Arrange urgent inspection by a qualified Junkers/Bosch technician.

Professional Required 5/5

Flue System / Combustion Chamber Gasket

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