Worcester Bosch 2927 B Fault Code

Also written as 2927B — same fault.

The Worcester Bosch 2927 B fault code means: your boiler has lost its flame while running and cannot stay lit, meaning it will likely shut down to prevent damage.. It appears on 2 Worcester Bosch models in our database.

Technical description: Flame failed during burner operation. Open the main shut off valve, shut down the appliance and check gas line, replace the ionisation electrode, set burner correctly and minimum rated load, check the integrity flue system and if the interconnected room air supply is too small, or the size of the ventilation opening is too small, clean the heating block on the flue gas side or replace the control unit/burner control unit