Low
0F on Viessmann Vitodens 242-F FB2B

This is simply a maintenance log entry indicating that a service was recently performed or that the service history has been reset.

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

After-service reset indicator (only in fault history)

From this model's manual
Verified against the Viessmann Vitodens 242 F B2ua installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

No action is required as this is an advisory note in the fault history, not an active fault.Ensure your boiler service records are up to date.If the 'Service' reminder is still on the main display, follow the manual instructions to clear the maintenance interval.

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