BoilerTool
Home / Greenstar 4000 System / 284
284

Opening air/gas ratio control valve/oil solenoid valves

Worcester Bosch Greenstar 4000 System

Category
O
Remedy
Operating message, is not a fault.
▶ Gas valve is opening.
This code also applies to:
Greenstar 1000 CombiGreenstar 2000 CombiGreenstar 4000 CombiGreenstar 8000 F CombiGreenstar 8000 F RegularGreenstar 8000+ StyleGreenstar 8000+
Source: Manufacturer manual (PDF)
hello@boilertool.co.uk
© 2026 BoilerTool