E29 High
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.
Technical description: Domestic hot water (DHW) sensor overheating error
Typical repair cost: £90-180 (including labour)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Protect yourself from future repair bills
A boiler cover plan would cover faults like E29 — no call-out fees, no surprises.
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Parts commonly replaced
- DHW Temperature Sensor (NTC thermistor)
- Limescale-blocked Heat Exchanger
- Diverter Valve
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