Low
07 on Alpha E-Tec Plus NX

Your boiler is currently in a manual testing mode used by engineers to check the flue, rather than having a genuine fault.

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

Chimney sweep function

From this model's manual
Verified against the Alpha E Tec Plus Nx installation & service manual, page 61.
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

Locate the reset button on the front control panelPress and hold the reset button for 3 to 5 secondsWait for the boiler to cycle through its startup process and return to normal operation

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