MAINS LED OFF High

Potterton MAINS LED OFF Fault Code

Also written as MAINSLEDOFF — same fault.

The Potterton MAINS LED OFF fault code means: your boiler has no electricity flowing to it, meaning it cannot operate or communicate with your heating controls.. It appears on 1 Potterton model 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: Mains LED off
Typical repair cost £100-250 (including labour)

DIY fix possible

Check that your boiler's power switch is turned onCheck your home's fuse box (consumer unit) to see if a trip switch has flippedEnsure your plug socket, if present, is switched on and the fuse is intact

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Potterton models that show the MAINS LED OFF fault code

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

Source

Potterton MAINS LED 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 7 July 2026