How much does it cost to fix boiler error code E85739?

Typical repair cost for the boiler E85739 fault is £140-£220 including labour.

E85739 High

Boiler Fault Code E85739

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code E85739 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 is unable to light the flame because the ignition system is faulty or damaged, leaving you without heating and hot water. (As reported on Potterton Powermax HE)

Pick your boiler brand for the E85739 fix

Potterton E85739 1 model

Source

Information for the E85739 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