High
59 on Viessmann Vitodens 111-W

Your boiler has lost the connection to the sensor that measures how hot your water is, meaning it cannot safely regulate the temperature.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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.

What the manual says

Manufacturer manual

Lead break, outlet temperature sensor

From this model's manual
Verified against the Viessmann Vitodens 111 W installation & service manual, page 56.
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 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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