I have a Vaillant Turbomax pro boiler and am after a guidance on the purpose of the Green Light on the right hand side of the control light.
The Green light is constantly on when there is no water demand. It does flash when water is demanded but only stops flashing when water demand is turned off.
I would appreciate your help
The Green light is constantly on when there is no water demand. It does flash when water is demanded but only stops flashing when water demand is turned off.
I would appreciate your help