EF
FAULT CODE
Worcester Bosch
Maximum Reset Count Exceeded
High Severity
Engineer Required
The boiler has been reset too many times without the underlying fault being resolved, and has entered a protective lockout state.
Step-by-Step Fix Guide
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Step 1
Do not attempt to reset again
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Step 2
Turn the boiler off at the mains fuse spur for 15 minutes
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Step 3 Engineer only
Call a Gas Safe engineer — the root cause must be identified before resetting further
Gas Safe Reminder
Work on gas appliances must be carried out by a Gas Safe registered engineer. The steps above cover safe checks a homeowner can perform - any internal component replacement requires a qualified professional. If in doubt, always call an engineer.