High
58 on Viessmann Vitodens 242-F FB2B

Your boiler has lost connection with the sensor that monitors your hot water tank, meaning the system cannot heat your water for taps and showers.

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, cylinder temperature sensor; no DHW heating

From this model's manual
Verified against the Viessmann Vitodens 242 F B2ua installation & service manual, page 34.
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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