Worcester Bosch · Greenstar CDi Classic ErP Combi
A8 boiler fault code
Greenstar CDi Classic ErP Combi
Get a Gas Safe engineer
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What A8 means
Break in communication to FX controls.
Gas Safe engineer: Note the code shown on the display. Do not open, adjust or repeatedly reset the boiler. Contact a Gas Safe registered engineer.
A boiler fault code alone is not a gas or carbon-monoxide emergency. If you smell gas, a CO alarm sounds, anyone feels unwell, or there is an unsafe flame, leave and call 0800 111 999 from outside.
Renting? Report it to your landlord or housing provider first. They are responsible for gas safety and boiler repairs, and the repair should not cost you.
Safe check
Note the code shown on the display. Do not open, adjust or repeatedly reset the boiler. Contact a Gas Safe registered engineer.
When to contact an engineer
Note the code shown on the display. Do not open, adjust or repeatedly reset the boiler. Contact a Gas Safe registered engineer.
Source and provenance
- Worcester Bosch Greenstar CDi Classic ErP User Instructions · 6 720 815 728 (2015/05) · §4.3 Error codes, Table 5, printed p. 16
user instructions
2015/05 · 6 720 815 728