How much does it cost to fix boiler error code E125?

Typical repair cost for the boiler E125 fault is £150-350 including labour.

E125 High

Boiler Fault Code E125

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code E125 appears across 3 boiler brands and 49 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is struggling to move hot water around the system, which is usually caused by a blockage or a pump issue that is preventing the unit from cooling itself down. (As reported on Main Eco Compact)

Pick your boiler brand for the E125 fix

Baxi E125 32 models Main E125 5 models Potterton E125 12 models

Source

Information for the E125 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