BoilerFaultCodesKeston E67 Fault Code
The Keston E67 fault code means: your boiler has stopped working because the water pressure inside the heating system has dropped too low.. It appears on 1 Keston model in our database.
Technical description: The system water pressure is too low. Check the system has water in and, for sealed systems, top up the system water pressure to restore a pressure of between 1 and 2 bar. (Consult your installer for instruction how to top up water pressure - repeated need for restoration of water pressure indicates a system leak which should be investigated)
DIY fix possible
Locate the external filling loop, which is usually a flexible silver hose connected between two valves near your boiler or hot water cylinder.Open the valves slowly to allow water to enter the system until the pressure gauge on the boiler shows between 1 and 1.5 bar.Close both valves tightly and remove the filling loop if required by your specific setup.
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Keston models that show the E67 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Keston E67 fault code information on this page is sourced and cross-checked against the official Keston service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026