F0
FAULT CODE
Worcester Bosch
Internal Component Fault
High Severity
Engineer Required
A general internal fault code indicating a component has failed. The specific sub-code (e.g. F0 238) gives more detail about which component.
Step-by-Step Fix Guide
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Step 1
Note the full code including sub-number if displayed
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Step 2
Turn off the boiler at the mains for 10 minutes then restart
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Step 3 Engineer only
If fault returns, call a Gas Safe engineer with the full code for diagnosis
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.