Hi, I had a nest 3rd gen thermostat fitted and I have follow the
necessary Y plan wiring diagram for my heating system. My issue if that
the thermostat has no control over the heating or hot water... I can
turn both off (from the stat) and the boiler...
Another update...I have since removed the cylinder stat cable from the
wiring centre. (I'm just trying to get something workig now). So I am
just dealing with the heating...The boiler still runs constantly even
with the heating set to off or below th...
Ok so an update, with the heat link removed the boiler does not fire...
I'm assuming now it's a faulty unit..? Does anyone think it's worth
returning for a replacement (only a week old) and trying again or am I
missing something glaringly obvious.......
Thank you for the reply,No additional timers or programmers on my
system. I'll be honest I didn't check to see if the boiler was still
firing after the heat link removed... Nut I was when I wired the new
valve in... I'll check when I'm home to see if...
Ok so I have disconnected the heat link from its power source as you say
and have no voltage across terminals 2, 3, 4, 5, 6 as I would expect. I
have changed my 3 port valve as I thought this was the issue but upon
turning back on I'm faced with the ...