BoilerFaultCodesKeston E10 Fault Code
The Keston E10 fault code means: your boiler’s internal computer has encountered a critical electronic failure and cannot safely operate the system.. It appears on 9 Keston models in our database.
Technical description: Control box errors - possible faulty control box.
What causes the Keston E10 fault?
This fault occurs when the boiler's central control board suffers a hardware malfunction or loses its ability to communicate with the internal sensors. The most common reason is a component failure on the printed circuit board (PCB) or a loose connection within the main wiring harness. Because the brain of the boiler can no longer verify that it is operating safely, it automatically shuts down as a precaution.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Keston models that show the E10 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Keston E10 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 27 April 2026