Pump antiseize Low

Worcester Bosch Pump antiseize Fault Code

Also written as PUMPANTISEIZE — same fault.

The Worcester Bosch Pump antiseize fault code means: your boiler is performing a routine maintenance check to ensure your water pump stays in good working condition.. It appears on 1 Worcester Bosch model in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Pump run 5 seconds every 24hrs

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Worcester Bosch models that show the Pump antiseize fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Worcester Bosch Pump antiseize fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026