Worcester Greenstar Si Compact EA 227 ignition fault

What Does Error EA 227 Mean?

On the documented Worcester Bosch Greenstar Si Compact ErP, EA with subcode 227 means no ionisation was detected after ignition. The user instructions permit the Reset button once and require service if the alert returns. The display does not prove whether flame failed to form or formed without valid sensing. Applies to: Greenstar Si Compact ErP This EA 227 definition is for Greenstar Si Compact ErP user instructions 6 720 813 279. Other Greenstar models attach different three-digit subcodes to EA, so record both lines of the display. Owner-safe checks: Photograph EA and 227 together, perform only the user-manual reset once, and note whether stable operation returns without opening the case. Qualified technician: Returning EA 227, gas, combustion, ionisation, electrode, vent, condensate, grounding, and sealed-case work require a Gas Safe registered engineer.