How much does it cost to fix Potterton error code All lights OFF?

Typical repair cost for the Potterton All lights OFF fault is £100-250 including labour.

All lights OFF High

Potterton All lights OFF Fault Code

Q: What does the Potterton All lights OFF fault code mean?

Your boiler has lost all power and is completely unresponsive, meaning it cannot provide heating or hot water until the electrical connection is restored.

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

Typical repair cost £100-250 (including labour)

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.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026