How much does it cost to fix ECA error code E15?

Typical repair cost for the ECA E15 fault is £120-280 including labour.

E15 High

ECA E15 Fault Code

Q: What does the ECA E15 fault code mean?

Your boiler has detected that the temperature sensors aren't reacting as quickly as expected, which usually means water isn't flowing correctly through the system.

The ECA E15 fault code means: your boiler has detected that the temperature sensors aren't reacting as quickly as expected, which usually means water isn't flowing correctly through the system.. It appears on 4 ECA models in our database.

Technical description: Sensor temperature change failure

Typical repair cost £120-280 (including labour)

DIY fix possible

Check that all radiator valves are fully openEnsure the boiler pressure is between 1.0 and 1.5 bar on the pressure gaugeGently bleed air from your radiators using a radiator key

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ECA models that show the E15 fault code

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

Source

ECA E15 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