BoilerFaultCodesRavenheat 09E Fault Code
The Ravenheat 09E fault code means: your boiler has shut down because it has detected that the water inside is getting too hot, usually due to a circulation blockage or a pump failure.. It appears on 7 Ravenheat models in our database.
Technical description: Overheat sensor overheating
What causes the Ravenheat 09E fault?
This fault occurs when the water inside the boiler exceeds a safe temperature limit, causing the safety sensors to shut the system down to prevent damage. The most common reasons are a pump that has seized and stopped moving water, or a buildup of debris and sludge that has physically blocked the heat exchanger.
This issue often surfaces in autumn when the heating is turned back on for the first time, as pumps can seize up after being idle during the summer months.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Ravenheat models that show the 09E fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ravenheat 09E 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