How much does it cost to fix boiler error code F.7?

Typical repair cost for the boiler F.7 fault is £120-200 including labour.

F.7 Medium

Boiler Fault Code F.7

Also written as F7 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code F.7 appears across 3 boiler brands and 6 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is struggling to accurately measure the temperature of the hot water because the sensor responsible for this information has a loose or broken connection. (As reported on Glow-worm Ultracom 2 SXI)

Pick your boiler brand for the F.7 fix

Glow-worm F.7 1 model Ideal F.7 1 model Viessmann F.7 4 models

Source

Information for the F.7 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