High
F.032 on Vaillant ecoTEC Plus 836

Your boiler has detected that the internal fan responsible for venting exhaust gases safely is not spinning at the correct speed, so it has shut down to prevent unsafe operation.

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 fan. Fan speed is outside of the tolerance.

From this model's manual
Verified against the Vaillant Ecotec Plus installation & service manual, page 83.
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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