How much does it cost to fix boiler error code Yellow LED On, Red LED On?

Typical repair cost for the boiler Yellow LED On, Red LED On fault is £0-120 including labour.

Yellow LED On, Red LED On High

Boiler Fault Code Yellow LED On, Red LED On

Also written as YELLOWLEDONREDLEDON — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Yellow LED On, Red LED On appears across 1 boiler brand and 1 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 the water pressure inside the system is too low to operate safely. (As reported on Vokera Option)

Pick your boiler brand for the Yellow LED On, Red LED On fix

Vokera Yellow LED On, Red LED On 1 model

Source

Information for the Yellow LED On, Red LED On 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