How much does it cost to fix Ravenheat error code E29?

Typical repair cost for the Ravenheat E29 fault is £90-180 including labour.

E29 High

Ravenheat E29 Fault Code

Q: What does the Ravenheat E29 fault code mean?

Your boiler has detected that the water used for your taps and showers is getting too hot, causing the system to shut down for safety.

The Ravenheat E29 fault code means: your boiler has detected that the water used for your taps and showers is getting too hot, causing the system to shut down for safety.. It appears on 9 Ravenheat models in our database.

Technical description: Domestic hot water (DHW) sensor overheating error

What causes the Ravenheat E29 fault?

This fault occurs when the internal sensors detect that the water temperature has risen beyond a safe limit, triggering a shutdown to prevent scalding or component damage. The most common reason is a faulty temperature sensor sending incorrect readings, or a build-up of limescale inside the heat exchanger which prevents water from flowing and cooling down properly.

Typical repair cost £90-180 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Ravenheat models that show the E29 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Ravenheat E29 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