How much does it cost to fix boiler error code SAFETY HIGH LIMIT THERMOSTAT?

Typical repair cost for the boiler SAFETY HIGH LIMIT THERMOSTAT fault is £90-180 including labour.

SAFETY HIGH LIMIT THERMOSTAT High

Boiler Fault Code SAFETY HIGH LIMIT THERMOSTAT

Also written as SAFETYHIGHLIMITTHERMOSTAT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code SAFETY HIGH LIMIT THERMOSTAT 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 switched itself off because it got too hot, acting as a safety measure to prevent damage. (As reported on Firebird Enviro System)

Pick your boiler brand for the SAFETY HIGH LIMIT THERMOSTAT fix

Firebird SAFETY HIGH LIMIT THERMOSTAT 2 models

Source

Information for the SAFETY HIGH LIMIT THERMOSTAT 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