00:2 Low

Viessmann 00:2 Fault Code

Also written as 002 — same fault.

The Viessmann 00:2 fault code means: this code is simply an information display showing your boiler's current setup configuration, rather than an error or a heating problem.. It appears on 1 Viessmann model in our database.

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.

Technical description: System design 1, 5: 1 heating circuit without mixer A1, with DHW heating

Engineer required

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

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Viessmann models that show the 00:2 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Viessmann 00:2 fault code information on this page is sourced and cross-checked against the official Viessmann service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026