How much does it cost to fix boiler error code 5Y?

Typical repair cost for the boiler 5Y fault is £0-80 including labour.

5Y Low

Boiler Fault Code 5Y

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 5Y 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’s control panel has become locked or entered a restricted mode, preventing you from changing any settings or operations. (As reported on Ideal Maximiser SE)

Pick your boiler brand for the 5Y fix

Ideal 5Y 1 model

Source

Information for the 5Y 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