Medium
3 green flashes on Baxi 400 Combi (range)

Your boiler is struggling to keep its flame lit and is currently trying to fix itself by restarting.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description

Temporary flame loss. Boiler will self reset, if fault continues you will see 3 red flashes.

DIY fix possible

Check that your gas supply is active and other gas appliances are workingMonitor the boiler to see if it self-resets and stays litEnsure the external flue terminal is not obstructed by debrisIf the fault persists or turns to red flashes, contact a Gas Safe engineer

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Related fault codes

3 red flashesView →E133View →E128View →

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