BoilerFaultCodesBuderus 2E Fault Code
The Buderus 2E fault code means: your boiler has stopped working because the water pressure is too low for it to operate safely.. It appears on 1 Buderus model in our database.
Technical description: Non blinking fault code: Water pressure in the system lower than 0.2 bar.
DIY fix possible
Locate the filling loop (usually a silver flexible hose) under or near the boiler.Open the one or two taps on the loop slowly until you hear water flowing.Watch the pressure gauge and close the taps once the needle reaches between 1.0 and 1.5 bar.
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Buderus models that show the 2E fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Buderus 2E fault code information on this page is sourced and cross-checked against the official Buderus service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026