BoilerFaultCodesKeston E62 Fault Code
The Keston E62 fault code means: your boiler has detected that the water pressure inside your heating system is too high, which could prevent it from working safely.. It appears on 1 Keston model in our database.
Technical description: Water pressure too high - check that the system water pressure top-up valve has not been left open or consult your installer to check the expansion vessel.
DIY fix possible
Locate the filling loop (a silver flexi-hose) connected to your heating pipes.Ensure both valves on the filling loop are turned firmly to the closed position.If the pressure remains high, cautiously bleed a radiator in the house to release some water until the gauge drops to between 1 and 1.5 bar.
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Keston models that show the E62 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Keston E62 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