Home/Boiler Fault Codes/Worcester Bosch E9
WORCESTER BOSCH FAULT CODE
Worcester Bosch E9
Indicates the safety temperature limiter on the central heating flow has tripped, which can be linked to a pressure or flow problem within the system.
WHAT E9 TYPICALLY INDICATES
Indicates the safety temperature limiter on the central heating flow has tripped, which can be linked to a pressure or flow problem within the system.
WHAT TO DO
Do not repeatedly reset the boiler if this code returns. This is not a DIY fix — it requires a Gas Safe registered engineer to diagnose and repair safely.
A NOTE ON GAS SAFE REGISTRATION
Any work on the gas side of a boiler in the UK legally requires a Gas Safe registered engineer, it isn't optional. Our engineers are fully Gas Safe registered, and you're always welcome to ask to see ID on the day. This page is general information about what a fault code typically indicates; it is not a substitute for an engineer diagnosing your specific boiler.
Seeing Worcester Bosch E9 on your boiler?
Tell us the code and your postcode. A fully Gas Safe registered engineer will diagnose the actual cause before quoting a fix.
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