A8
Worcester Bosch fault code
Worcester Bosch A8: lost communication with the boiler's controls
Engineer only
Worcester describes A8 as a break in communication between the boiler and its FX controls.
What you can safely do
There is nothing you can safely do yourself with this one. Leave the boiler off and book an engineer.
Call a Gas Safe engineer if
- Contact your installer or a Gas Safe registered engineer to check the controls and wiring.
Find a Gas Safe engineer near you
Opens the official Gas Safe Register search.
Applies to: Greenstar CDi Classic. Codes can differ between models, so check your manual.