How much does it cost to fix boiler error code L31?

Typical repair cost for the boiler L31 fault is £650-£1,100 including labour.

L31 High

Boiler Fault Code L31

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code L31 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 heat pump's internal control computer has detected an electrical fault with the unit that powers the motor, preventing it from running. (As reported on Ideal HP290)

Pick your boiler brand for the L31 fix

Ideal L31 1 model

Source

Information for the L31 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