209 High

ECA 209 Fault Code

The ECA 209 fault code means: your boiler has detected an issue with the water circulation or temperature in your central heating system, causing it to shut down for safety.. It appears on 1 ECA model 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: Heating circuit error
Typical repair cost £120-280 (including labour)

DIY fix possible

Check if your radiator valves are openEnsure your boiler pressure is between 1.0 and 1.5 barReset the boiler using the power button or reset dial

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ECA models that show the 209 fault code

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

Source

ECA 209 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