BoilerFaultCodesPotterton Ignition LOCKOUT Fault Code
Also written as IGNITIONLOCKOUT — same fault.
The Potterton Ignition LOCKOUT fault code means: your boiler has stopped working because it failed to light the flame, which could be due to a simple issue like a gas supply problem or a fault with the internal ignition components.. It appears on 6 Potterton models in our database.
Technical description: Manual Lockout. No gas supply, reversed polarity, gas valve lead continuity fault, spark generator fault, electrode damaged/gap incorrect, or flame detection 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 Ignition LOCKOUT fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton Ignition LOCKOUT fault code information on this page is sourced and cross-checked against the official Potterton service / installation manuals for each affected model.
- Potterton Performa SL HE 9 2 manual (PDF)
- Potterton Promax FSB 30HE manual (PDF)
- Potterton Promax HE manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026