BoilerFaultCodesChaffoteaux E02 Fault Code
The Chaffoteaux E02 fault code means: your boiler has temporarily stopped working because the water pressure inside the system has dropped too low.. It appears on 2 Chaffoteaux models in our database.
Technical description: The pressure of the primary circuit is 0.8 bar or lower, the boiler will lockout after 40 seconds
DIY fix possible
Locate the filling loop underneath your boiler or near the hot water cylinder.Open the valves slowly to allow water into the system until the pressure gauge reads between 1.0 and 1.5 bar.Close the valves firmly and press the reset button on your boiler.
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Chaffoteaux models that show the E02 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Chaffoteaux E02 fault code information on this page is sourced and cross-checked against the official Chaffoteaux service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026