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Meaning of LEDs on Box Next to Ariston Combi Boiler

Postby RonH » Sat Nov 28, 2015 10:07 pm


I just moved into a flat that has a combi boiler installed in the bedroom closet. It's an Ariston. Next to the boiler is a small white box, unmarked, with two LEDs. The one on the right is always red/orange. When the one on the left is green, the central heating system will work. When it is turned off (no colour), the central heating system turns itself off. Can someone tell me what this means?


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