Hi Everyone
I hope someone can help with this. I've just installed a new nest 3rd gen heating and I am having problems with the hot water control. My problem is that it is not switching the hot water relay on and off, it is permanently sending power between terminal 5 and 6, regardless of whether I set schedule or boost to on or off. The app says it's off but it is calling for hot water. I can get it to turn it off if I reset the heatlink by holding the button for 10 sec, I can see with a meter that it then switches back to terminals 4 and 5. However once the thermostat reconnects it permanently switches the how water on again. The heating is working perfectly and I can hear the relay click when I ask for heat but not hot water. As a bit of background I am replacing a hive system which worked fine (but is now obsolete), I am also on my second nest as the first did exactly the same thing and I sent it back for a replacement thinking that the hot water relay was stuck. Now I wonder if either they have a system problem or it's something in the setup. Does anyone have any ideas before I give up on nest and go for a different manufacturer?
Any help greatly appreciated.
