24:0 Low

Viessmann 24:0 Fault Code

Also written as 240 — same fault.

The Viessmann 24:0 fault code means: your boiler is simply indicating that no urgent service or maintenance is currently required at this time.. It appears on 5 Viessmann models 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: No 'Maintenance' display

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 24:0 fault code

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

Source

Viessmann 24:0 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 27 April 2026