BoilerFaultCodesPotterton 3 red flashes Fault Code
Also written as 3REDFLASHES — same fault.
The Potterton 3 red flashes fault code means: your boiler has failed to ignite after several attempts and has locked itself out for safety.. It appears on 1 Potterton model in our database.
Technical description: Ignition Fault lockout
DIY fix possible
Check that your gas emergency control valve is in the 'on' position and you have credit on your meter.Ensure other gas appliances in your home, such as a hob, are working correctly.Turn the selector switch to the 'Reset' position for five seconds and then back to the 'Run' position.
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A cover plan would handle faults like 3 red flashes: no call-out fees, no surprise bills.
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Potterton models that show the 3 red flashes fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton 3 red flashes 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