BoilerFaultCodesWorcester Bosch EA 229 Fault Code
Also written as EA229 — same fault.
The Worcester Bosch EA 229 fault code means: your boiler has lost its flame while it was running, which means it has stopped providing heating and hot water for safety.. It appears on 4 Worcester Bosch models in our database.
Technical description: Loss of ionisation signal during operation
DIY fix possible
Check if other gas appliances in your home, like a hob, are working to confirm gas supply.Ensure your prepaid gas meter (if applicable) has enough credit.Check if the white plastic condensate pipe leading outside has frozen during cold weather.Press and hold the 'Reset' button for five seconds to restart the boiler.
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Worcester Bosch models that show the EA 229 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch EA 229 fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026