Baxi Early Flame Failure / Safety Trip

Furnace starts but shuts down after a few seconds without showing an error code

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

Weak flame signal, Poor grounding, Intermittent gas supply, Faulty flame sensor or ignition lead

Safety: Turn off gas and power if repeated failed starts occur.

Clean flame sensor: Remove and clean the ionisation probe as described earlier.
Check earth: Ensure the Baxi chassis earth connection is tight and free of corrosion.
Observe gas supply: If other gas appliances also cut out, contact the gas supplier.
Professional diagnosis: A technician can check gas pressures and ignition characteristics.

Hard 4/5

Flame Sensor / Ignition Electrode

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