How much does it cost to fix boiler error code PROBE FAULT?

Typical repair cost for the boiler PROBE FAULT fault is £150-250 including labour.

PROBE FAULT High

Boiler Fault Code PROBE FAULT

Also written as PROBEFAULT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code PROBE FAULT 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 lost the signal from one of its internal temperature sensors, which is preventing it from heating your home safely. (As reported on Grant Spira)

Pick your boiler brand for the PROBE FAULT fix

Grant PROBE FAULT 1 model

Source

Information for the PROBE FAULT 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