F05 High

ECA F05 Fault Code

The ECA F05 fault code means: your boiler has stopped working because the fan that helps remove waste gases is not spinning correctly or communicating with the system.. It appears on 3 ECA models in our database.

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.

Technical description: Fan Feedback Fault (blocking) — failure of fan or fan cable; press Reset; if persists notify ECA authorised service
Typical repair cost £180-350 (including labour)

Engineer required

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

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ECA models that show the F05 fault code

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

Source

ECA F05 fault code information on this page is sourced and cross-checked against the official ECA service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026