BoilerFaultCodesRavenheat E10 Fault Code
The Ravenheat E10 fault code means: your boiler has too much water in the system, which puts extra stress on the internal components.. It appears on 9 Ravenheat models in our database.
Technical description: High water pressure
What causes the Ravenheat E10 fault?
This fault occurs when the water pressure inside your heating system rises above the safe operating limit. The most common reason is that the manual filling loop has been left slightly open or is leaking, allowing fresh water to constantly enter the system. It can also happen if the internal expansion vessel has failed, meaning it can no longer absorb the natural expansion of water as it heats up.
DIY fix possible
Check that the filling loop valves are fully closed and tightBleed water from a radiator using a bleed key to reduce pressureMonitor the pressure gauge to ensure it returns to between 1 and 1.5 barReset the boiler once the correct pressure is reached
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Gas Safe Register →Ravenheat models that show the E10 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ravenheat E10 fault code information on this page is sourced and cross-checked against the official Ravenheat service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026