Low
Yellow LED solid on Vokera Sabre 29HE

Your boiler has a sensor issue, but it will continue to work by providing hot water at a constant temperature to ensure you aren't left without.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

DHW thermistor fault — appliance still operates, DHW outlet fixed at 50–55°C; replace DHW thermistor

From this model's manual
Verified against the Vokera Sabre He Combi installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

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

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