BoilerFaultCodesPotterton neon flashing (Section H & K) Fault Code
Also written as NEONFLASHINGSECTIONHK — same fault.
The Potterton neon flashing (Section H & K) fault code means: your boiler is failing to light the burner because it cannot detect or create the initial spark, so it has safely shut itself down to prevent a build-up of unburnt gas.. It appears on 4 Potterton models in our database.
Technical description: Spark at ignition electrodes - Ignition electrode and lead, electrode gap and position, or On/Off/Reset selector fault.
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 neon flashing (Section H & K) fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton neon flashing (Section H & K) fault code information on this page is sourced and cross-checked against the official Potterton service / installation manuals for each affected model.
- Potterton Performa 24 Eco HE manual (PDF)
- Potterton Performa 24i HE manual (PDF)
- Potterton Performa 30 HE manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026