Meaning of LEDs on Box Next to Ariston Combi Boiler Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[RonH]

Hi

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?

Thanks

Ron