How much does it cost to fix boiler error code Mains LEDs?

Typical repair cost for the boiler Mains LEDs fault is £150-350 including labour.

Mains LEDs High

Boiler Fault Code Mains LEDs

Also written as MAINSLEDS — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Mains LEDs appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has lost all power and is completely unresponsive, likely due to an internal electrical protection component failing. (As reported on Saunier Duval SD 30e)

Pick your boiler brand for the Mains LEDs fix

Saunier Duval Mains LEDs 1 model

Source

Information for the Mains LEDs fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

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