How much does it cost to fix Ferroli error code LED 4 (C.H.)?

Typical repair cost for the Ferroli LED 4 (C.H.) fault is £120-250 including labour.

LED 4 (C.H.) High

Ferroli LED 4 (C.H.) Fault Code

Q: What does the Ferroli LED 4 (C.H.) fault code mean?

Your boiler has stopped heating your radiators because it is either detecting an overheating issue or is struggling to communicate with its internal temperature sensors.

Also written as LED4CH — same fault.

The Ferroli LED 4 (C.H.) fault code means: your boiler has stopped heating your radiators because it is either detecting an overheating issue or is struggling to communicate with its internal temperature sensors.. 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 £120-250 (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 (C.H.) fault code

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

Source

Ferroli LED 4 (C.H.) 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