Low
F.16 on Viessmann Vitodens 200-W B2HF System

Your boiler is reporting that it is not receiving heat from your solar thermal panels to warm your hot water tank as expected.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

No solar DHW heating

From this model's manual
Verified against the Viessmann Vitodens 200 W B2hf System installation & service manual, page 88.
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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