6A
FAULT CODE
Worcester Bosch
Safety Fuse Fault
High Severity
Engineer Required
The internal safety fuse has blown. This can be caused by tampering, poor maintenance, or loose wiring inside the boiler.
Step-by-Step Fix Guide
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Step 1
Do not attempt to open the boiler or replace the fuse yourself
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Step 2
A Gas Safe engineer will need to determine what caused the fuse to blow
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Step 3 Engineer only
The wiring and internal connections will need checking before replacing the fuse
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.