BoilerFaultCodesRemeha é2 Fault Code
Also written as 2 — same fault.
The Remeha é2 fault code means: your boiler has detected that water is not circulating correctly, often because there is trapped air or the system pressure is too low.. It appears on 9 Remeha models in our database.
Technical description: Return temperature is higher than the flow temperature. Insufficient water. No through flow. Too much air in the system. Sensors not wired correctly. Deviation in the flow or return temperature sensor.
What causes the Remeha é2 fault?
This fault occurs when the boiler's internal sensors detect that the temperatures are the wrong way around or not changing as expected, suggesting water isn't moving through the unit. The most common reasons are a lack of water pressure, a buildup of trapped air pockets, or a pump that has seized and can no longer push water around your radiators. Essentially, the boiler is shutting down to prevent itself from overheating because the heat it produces has nowhere to go.
This issue often appears in autumn when the heating is turned on for the first time after summer, as pump components can seize during long periods of inactivity.
DIY fix possible
Check the pressure gauge and top up to 1.5 bar if it is lowBleed all radiators to remove trapped airEnsure all radiator valves and isolation valves are fully openReset the boiler using the reset button
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Remeha models that show the é2 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Remeha é2 fault code information on this page is sourced and cross-checked against the official Remeha service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026