Low
d.08 on Heatline Capriz Plus

Your boiler is simply reporting that it has received a signal from your wall thermostat to either turn the heating on or off.

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

Current state of the 230V room thermostat

From this model's manual
Verified against the Heatline Capriz Plus installation & service manual, page 25.
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

Check your room thermostat to see if it is currently set to request heatAdjust the temperature dial on your wall thermostat to see if the status code changesNote that this is an information code rather than a fault, meaning the boiler is working normally

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