How much does it cost to fix boiler error code LED 4: 0 (Central Heating)?

Typical repair cost for the boiler LED 4: 0 (Central Heating) fault is £90-180 including labour.

LED 4: 0 (Central Heating) High

Boiler Fault Code LED 4: 0 (Central Heating)

Also written as LED40CENTRALHEATING — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code LED 4: 0 (Central Heating) 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 working because it thinks it is overheating or it cannot correctly read the temperature sensor for your radiators. (As reported on Ferroli Arean)

Pick your boiler brand for the LED 4: 0 (Central Heating) fix

Ferroli LED 4: 0 (Central Heating) 2 models

Source

Information for the LED 4: 0 (Central Heating) 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