How much does it cost to fix Ferroli error code LED 4 (CH)?

Typical repair cost for the Ferroli LED 4 (CH) fault is £120-220 including labour.

LED 4 (CH) High

Ferroli LED 4 (CH) Fault Code

Q: What does the Ferroli LED 4 (CH) fault code mean?

Your boiler has detected an issue with its internal temperature sensing, meaning it cannot accurately judge how much to heat your radiators.

Also written as LED4CH — same fault.

The Ferroli LED 4 (CH) fault code means: your boiler has detected an issue with its internal temperature sensing, meaning it cannot accurately judge how much to heat your radiators.. It appears on 2 Ferroli models in our database.

Technical description: Central heating sensor (34) not connected or boiler temperature too high or boiler thermostat (61) below CH temperature.

Typical repair cost £120-220 (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 LED 4 (CH) fault code

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

Source

Ferroli LED 4 (CH) 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