BoilerFaultCodesPotterton All lights OFF Fault Code
Also written as ALLLIGHTSOFF — same fault.
The Potterton All lights OFF fault code means: your boiler has lost all power and is completely unresponsive, meaning it cannot provide heating or hot water until the electrical connection is restored.. It appears on 5 Potterton models in our database.
Technical description: Check external wiring, mains supply, or if Fuse F1 on the Electronic Board has blown
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 All lights OFF fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton All lights OFF fault code information on this page is sourced and cross-checked against the official Potterton service / installation manuals for each affected model.
- Potterton Prima 30B manual (PDF)
- Potterton Profile 60E manual (PDF)
- Potterton Puma 100e manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026