The furnace shows flame loss during operation; the burner repeatedly lights and goes out.

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

Partially blocked burner, incorrect gas pressure, faulty flame sensor, poor combustion air supply.

Safety: Switch off the power and gas. Do not continue to run the appliance with an unstable flame.

Check air supply: Ensure ventilation grilles and the Baxi flue/air intake are unobstructed.
Clean burner and flame sensor: Remove the burner assembly and clean the ports with a soft brush. Clean the flame sensor as described for E02.
Condensate check: Confirm the condensate trap and drain are clear, as backing up condensate can disturb combustion.
Professional combustion check: A gas engineer should verify the gas rate and perform flue gas analysis to ensure stable combustion.

Professional Required 5/5

Main Burner Assembly

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