High
F.330 on Vaillant ecoTEC Plus 832

Your boiler has detected that the water pump responsible for circulating heat around your home is not communicating correctly, meaning your heating and hot water will not work.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

What the manual says

Manufacturer manual

Fault in the electrical connection for the pump. The pump is not responding to commands during the hydraulic test.

From this model's manual
Verified against the Vaillant Ecotec Plus installation & service manual, page 90.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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