How much does it cost to fix boiler error code Check JP1?

Typical repair cost for the boiler Check JP1 fault is £120-250 including labour.

Check JP1 High

Boiler Fault Code Check JP1

Also written as CHECKJP1 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Check JP1 appears across 1 boiler brand and 4 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 an internal configuration error, likely due to a loose link on the main computer board, which is preventing it from starting up correctly. (As reported on Vokera Compact 25)

Pick your boiler brand for the Check JP1 fix

Vokera Check JP1 4 models

Source

Information for the Check JP1 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