F47 High

ECA F47 Fault Code

The ECA F47 fault code means: your boiler has stopped working because it cannot detect the water pressure sensor, meaning it won't run until it knows there is enough water in the system.. It appears on 4 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: Water Pressure Sensor Error (blocking) — water pressure sensor not plugged in or no contact; press Reset; if persists notify ECA authorised service
Typical repair cost £90-180 (including labour)

DIY fix possible

Press the 'Reset' button on the boiler control panelCheck the digital or manual pressure gauge to ensure water level is between 1.0 and 1.5 barIf pressure is low, top up the system using the filling loopIf the code returns immediately despite good pressure, call a gas safe engineer

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ECA models that show the F47 fault code

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

Source

ECA F47 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