BoilerFaultCodesPotterton Flame Failure neon Fault Code
Also written as FLAMEFAILURENEON — same fault.
The Potterton Flame Failure neon fault code means: your boiler has lost its flame while it was supposed to be running, causing the system to shut down for safety.. It appears on 2 Potterton models in our database.
Technical description: Illuminates if the burner is extinguished while there is still a demand for the boiler to operate. Indicates a fault if it illuminates repeatedly.
What causes the Potterton Flame Failure neon fault?
This fault occurs when the boiler's control system can no longer detect a flame while the unit is trying to heat your home. It is often caused by a dirty or worn-out sensor that can't see the fire, or a faulty gas valve that isn't providing enough fuel to keep the burner lit. Because the boiler cannot confirm it is burning gas safely, it shuts down entirely to prevent unburnt gas from building up.
DIY fix possible
Check if other gas appliances, like a hob, are working to ensure gas is reaching the propertyCheck if your gas meter has credit (if applicable)Press the reset button once to see if the boiler restarts
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Potterton models that show the Flame Failure neon fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton Flame Failure neon 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 27 April 2026