Lights: Off Off Off High

Potterton Lights: Off Off Off Fault Code

Also written as LIGHTSOFFOFFOFF — same fault.

The Potterton Lights: Off Off Off fault code means: your boiler has lost all power and is completely switched off, likely due to a blown fuse or an electrical supply issue.. It appears on 3 Potterton models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Failure of electrical supply. Check 240V at terminal block and PCB fuse.
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 Lights: Off Off Off fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Potterton Lights: Off Off 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