How much does it cost to fix Potterton error code MAINS LED FLASHING?

Typical repair cost for the Potterton MAINS LED FLASHING fault is £120-250 including labour.

MAINS LED FLASHING High

Potterton MAINS LED FLASHING Fault Code

Q: What does the Potterton MAINS LED FLASHING fault code mean?

Your boiler has detected that it is running too hot or has experienced an internal control error, so it has safely shut itself down to prevent damage.

Also written as MAINSLEDFLASHING — same fault.

The Potterton MAINS LED FLASHING fault code means: your boiler has detected that it is running too hot or has experienced an internal control error, so it has safely shut itself down to prevent damage.. It appears on 1 Potterton model in our database.

Technical description: Overheat or Control Lockout

Typical repair cost £120-250 (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 MAINS LED FLASHING fault code

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

Performa System HE Repair: £120-250

Source

Potterton MAINS LED FLASHING 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