BoilerFaultCodesRavenheat 29E Fault Code
The Ravenheat 29E fault code means: your hot water system is getting too hot and has shut down as a safety precaution.. It appears on 7 Ravenheat models in our database.
Technical description: D.H/W sensor overheating error
What causes the Ravenheat 29E fault?
This fault occurs when the internal temperature sensor detects that your hot water is becoming dangerously hot, triggering an emergency shutdown to prevent scalding. The most common reason is a buildup of limescale or debris inside the heat exchanger which restricts water flow, but it can also be caused by a mechanical failure in the diverter valve or a faulty sensor giving a false reading.
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 29E fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ravenheat 29E 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