How much does it cost to fix boiler error code J46?

Typical repair cost for the boiler J46 fault is £450-950 including labour.

J46 High

Boiler Fault Code J46

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code J46 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 power control system has encountered a fault, meaning the outdoor unit cannot currently run to provide heating or hot water. (As reported on Ideal HP290)

Pick your boiler brand for the J46 fix

Ideal J46 1 model

Source

Information for the J46 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