How much does it cost to fix boiler error code LED 5: 1?

Typical repair cost for the boiler LED 5: 1 fault is £280-450 including labour.

LED 5: 1 High

Boiler Fault Code LED 5: 1

Also written as LED51 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code LED 5: 1 appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's main internal computer has developed a critical electronic failure and can no longer process the startup sequence. (As reported on Ferroli Arean)

Pick your boiler brand for the LED 5: 1 fix

Ferroli LED 5: 1 2 models

Source

Information for the LED 5: 1 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