BoilerFaultCodesECA E80 Fault Code
The ECA E80 fault code means: your boiler has shut down because it thinks the water returning from your radiators is hotter than the water leaving the boiler, which usually indicates a sensor error or a circulation problem.. It appears on 4 ECA models in our database.
Technical description: Temperature difference error between return and supply water temperature sensor (lockout) — temperature detected by return sensor is higher than supply sensor; press Reset; if persists notify ECA authorised service
DIY fix possible
Press the Reset button on the control panel to clear the temporary lockout.Check that all radiator valves are fully open and your home's thermostat is calling for heat.Ensure the boiler pressure is between 1.0 and 1.5 bar on the pressure gauge.
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ECA models that show the E80 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
ECA E80 fault code information on this page is sourced and cross-checked against the official ECA service / installation manuals for each affected model.
- ECA Confeo Premix HCH manual (PDF)
- ECA Confeo Premix HM manual (PDF)
- ECA Confeo Premix HST manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026