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

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

LED 4 (C.H.) High

Boiler Fault Code LED 4 (C.H.)

Also written as LED4CH — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code LED 4 (C.H.) appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning 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. (As reported on Ferroli Arean)

Pick your boiler brand for the LED 4 (C.H.) fix

Ferroli LED 4 (C.H.) 2 models

Source

Information for the LED 4 (C.H.) 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