A1
FAULT CODE
Worcester Bosch
Pump Stuck or Running Dry
High Severity
Engineer Required
The circulation pump is not running correctly — either it is seized, running without water, or its wiring has a fault.
Step-by-Step Fix Guide
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Step 1
Check system pressure is correct
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Step 2
Do not attempt to open the boiler casing
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Step 3 Engineer only
A Gas Safe engineer will need to test the pump — if seized, it can sometimes be freed, but often needs replacing
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.