BoilerFaultCodesPotterton 3 flashes red Fault Code
Also written as 3FLASHESRED — same fault.
The Potterton 3 flashes red fault code means: your boiler is failing to light the flame properly, which means it has automatically shut down to prevent gas from building up in the system.. It appears on 1 Potterton model in our database.
Technical description: Ignition fault: No ignition, No flame detected following ignition, False flame signal detected, Repeated loss of flame detected
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Potterton models that show the 3 flashes red fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton 3 flashes red fault code information on this page is sourced and cross-checked against the official Potterton service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026