Burner reset light green/red alternate flash (0.5s) High

Boiler Fault Code Burner reset light green/red alternate flash (0.5s)

Q: How much does it cost to fix boiler error code Burner reset light green/red alternate flash (0.5s)?

Typical repair cost for the boiler Burner reset light green/red alternate flash (0.5s) fault is £120-280 including labour.

Also written as BURNERRESETLIGHTGREENREDALTERNATEFLASH05S — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code Burner reset light green/red alternate flash (0.5s) appears across 2 boiler brands 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's safety sensor is detecting a flame when there shouldn't be one, causing it to stop the ignition process for your safety. (As reported on Worcester Bosch Danesmoor)

Pick your boiler brand for the Burner reset light green/red alternate flash (0.5s) fix

Grant Burner reset light green/red alternate flash (0.5s) 1 model Worcester Bosch Burner reset light green/red alternate flash (0.5s) 1 model

Source

Information for the Burner reset light green/red alternate flash (0.5s) 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 7 July 2026