What the manual says
Manufacturer manualindicates that the gas supply has been interrupted, ignition has failed or the flame has not been detected.
From this model's manual
Verified against the Baxi/Baxi 636 Combi Lpg installation & service manual.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Related fault codes
All 17 fault codes on the 636 COMBI
Seeing a different code? Every code this model can display, in one place.