How much does it cost to fix boiler error code floor thermostat contact open?

Typical repair cost for the boiler floor thermostat contact open fault is £120-250 including labour.

floor thermostat contact open High

Boiler Fault Code floor thermostat contact open

Also written as FLOORTHERMOSTATCONTACTOPEN — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code floor thermostat contact open 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 automatically shut down because the water inside the system has become dangerously hot. (As reported on Ariston Clas One)

Pick your boiler brand for the floor thermostat contact open fix

Ariston floor thermostat contact open 1 model

Source

Information for the floor thermostat contact open 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