How much does it cost to fix boiler error code ER 15 + RESET?

Typical repair cost for the boiler ER 15 + RESET fault is £120-300 including labour.

ER 15 + RESET High

Boiler Fault Code ER 15 + RESET

Also written as ER15RESET — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code ER 15 + RESET 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 has detected that the water is getting too hot too quickly because it isn't moving through the system properly. (As reported on Johnson Starley Warmcair DW)

Pick your boiler brand for the ER 15 + RESET fix

Johnson Starley ER 15 + RESET 1 model

Source

Information for the ER 15 + RESET 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