How much does it cost to fix boiler error code F71?

Typical repair cost for the boiler F71 fault is £90-160 including labour.

F71 High

Boiler Fault Code F71

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code F71 appears across 3 boiler brands and 9 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has detected that a temperature sensor has either come loose or stopped working correctly, meaning it can no longer safely monitor the heat of the water leaving the unit. (As reported on Glow-worm Easicom 24)

Pick your boiler brand for the F71 fix

Ferroli F71 1 model Glow-worm F71 1 model Heatline F71 7 models

Source

Information for the F71 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 7 July 2026