How much does it cost to fix boiler error code Red LED (Illuminated)?

Typical repair cost for the boiler Red LED (Illuminated) fault is £90-250 including labour.

Red LED (Illuminated) Emergency

Boiler Fault Code Red LED (Illuminated)

Also written as REDLEDILLUMINATED — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Red LED (Illuminated) appears across 3 boiler brands and 7 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has shut down because it has either become too hot or detected that dangerous exhaust fumes are not escaping correctly through the chimney. (As reported on Potterton Kingfisher MF 40-100)

Pick your boiler brand for the Red LED (Illuminated) fix

Halstead Red LED (Illuminated) 1 model Potterton Red LED (Illuminated) 5 models Vokera Red LED (Illuminated) 1 model

Source

Information for the Red LED (Illuminated) 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