Baxi Heat 424 Fault codes & diagnostics

1 fault code with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

Heat Natural Gas 2017-present
GC Number 41-470-53
Download the Baxi Heat 424 manualThe official installation and service manual (PDF). PDF

This boiler uses LED flash patterns

Count the flashes in one repeating group before the pause. That number is your fault code. Do not reset until you have noted it. How to read fault codes →

Fault codes

All 1 documented codes

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