High
E29 on Ravenheat 100

Your boiler has detected that the water used for your taps and shower is getting too hot, so it has shut down to prevent damage or scalding.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Domestic hot water (DHW) sensor overheating error

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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