How much does it cost to fix boiler error code Tap symbol light ON?

Typical repair cost for the boiler Tap symbol light ON fault is £100-200 including labour.

Tap symbol light ON Medium

Boiler Fault Code Tap symbol light ON

Also written as TAPSYMBOLLIGHTON — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Tap symbol light ON appears across 1 boiler brand and 4 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 detect the temperature of the water for your taps, which means it will likely stop providing hot water until the faulty sensor is replaced. (As reported on Ferroli Falcon)

Pick your boiler brand for the Tap symbol light ON fix

Ferroli Tap symbol light ON 4 models

Source

Information for the Tap symbol light ON 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