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

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

Tap symbol light ON Medium

Ferroli Tap symbol light ON Fault Code

Q: What does the Ferroli Tap symbol light ON fault code mean?

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.

Also written as TAPSYMBOLLIGHTON — same fault.

The Ferroli Tap symbol light ON fault code means: 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.. It appears on 4 Ferroli models in our database.

Technical description: D.H.W. sensor fault

Typical repair cost £100-200 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Ferroli models that show the Tap symbol light ON fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Ferroli Tap symbol light ON fault code information on this page is sourced and cross-checked against the official Ferroli service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026