How much does it cost to fix boiler error code Primary Overheat?

Typical repair cost for the boiler Primary Overheat fault is £120-250 including labour.

Primary Overheat High

Boiler Fault Code Primary Overheat

Also written as PRIMARYOVERHEAT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Primary Overheat appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has automatically shut down because it has become too hot to operate safely and needs attention to restore central heating or hot water. (As reported on Worcester Bosch 24CDi BF)

Pick your boiler brand for the Primary Overheat fix

Worcester Bosch Primary Overheat 2 models

Source

Information for the Primary Overheat 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