Worcester Bosch Boiler Fault Codes Explained.
As Birmingham based Worcester Accredited Installers, our engineers are on hand to help with any Worcester boiler fault codes by diagnosing and fixing any issues where possible. This handy Worcester Bosch boiler error guide can help you diagnose any problems before giving one of our engineers a call.
Worcester Bosch Boiler Error Codes
By using the table below, you can find information about the most common Worcester Bosch boiler fault codes and information on how to diagnose and solve the issue. The error codes below relate to the Worcester Bosch’s CDI and Greenstar models. Be sure to check your model's manual for further information.
Error Code | Fault Name & Description |
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E9 | Safety Temperature Limiter has tripped.The boiler has detected an issue with its temperature and has safely shut down. The part of the boiler causing the issue will depend on the error code that follows the E9 code:
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Error Code | Fault Name & Description | EA | Flame not detected.This means that the boiler cannot detect a flame after ignition, so it has shut down safely until the problem is rectified. This can be caused by a number of issues:
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Error Code | Fault Name & Description |
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F7 | “False Flame” - flame detected when boiler was shut off.This fault means that the boiler has detected a flame when there should not be one because the boiler is either off or on standby. Upon detecting the flame, the boiler will shut down for safety. This can occur for a number of different reasons:
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