How much does it cost to fix boiler error code Red led permanently on?

Typical repair cost for the boiler Red led permanently on fault is £80-150 including labour.

Red led permanently on High

Boiler Fault Code Red led permanently on

Also written as REDLEDPERMANENTLYON — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Red led permanently 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 heating system has dropped too low to operate safely. (As reported on Saunier Duval Semia Condens F30 E)

Pick your boiler brand for the Red led permanently on fix

Saunier Duval Red led permanently on 1 model

Source

Information for the Red led permanently 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