How much does it cost to fix boiler error code Excessive temperature on primary circuit?

Typical repair cost for the boiler Excessive temperature on primary circuit fault is £150-350 including labour.

Excessive temperature on primary circuit Emergency

Boiler Fault Code Excessive temperature on primary circuit

Also written as EXCESSIVETEMPERATUREONPRIMARYCIRCUIT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 31 August 2026

Fault code Excessive temperature on primary circuit appears across 2 boiler brands and 7 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 the water inside it has become dangerously hot. (As reported on Ideal Mini)

Pick your boiler brand for the Excessive temperature on primary circuit fix

Biasi Excessive temperature on primary circuit 6 models Ideal Excessive temperature on primary circuit 1 model

Source

Information for the Excessive temperature on primary circuit 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 31 August 2026