How much does it cost to fix boiler error code OVERHEAT PROTECTION TEST?

Typical repair cost for the boiler OVERHEAT PROTECTION TEST fault is £120-190 including labour.

OVERHEAT PROTECTION TEST Emergency

Boiler Fault Code OVERHEAT PROTECTION TEST

Also written as OVERHEATPROTECTIONTEST — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code OVERHEAT PROTECTION TEST 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 failed a safety check because it is unable to automatically shut off the burner if the water temperature gets dangerously high. (As reported on Worcester Bosch 24CDi BF)

Pick your boiler brand for the OVERHEAT PROTECTION TEST fix

Worcester Bosch OVERHEAT PROTECTION TEST 1 model

Source

Information for the OVERHEAT PROTECTION TEST 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