Hardware Model Specification
Worcester Bosch Greenstar 4000 Diagnostics
Classification: HVAC & Boilers Equipment
Hardware operational fault codes, protection alarms, LED blink sequences, and step-by-step diagnostic fixes for the Worcester Bosch Greenstar 4000.
1 Documented Faults
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Full Multimeter & Safety Isolation Procedures
Indexed Fault Codes for Greenstar 4000
Step-by-step resolution manuals and root cause matrices
CODE EA 229
Severity: High
Difficulty: Intermediate
EA 229 Flame Loss Lockout
Lockout code EA sub-code 229 indicates the control board detected an unexpected flame extinction during an active firing cycle after successful ignition. Safety monitoring circuit tripped due to ionization current dropping below the minimum threshold (<1.0 µA DC).
⏱ 30-45 Mins
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