Nest - Call for heat not working, but hot water is

[Mike Young]

I believe I only used two...Nest never mentions what to do with your old wiring.

Just a hint....make sure you when you drop the wires behind the wall you attach a wire incase you need to grab them back.

 

[zappermac]

Called nest installer....

Everything was wired up correctly...

But.... when i added nest thermostat I just taped up old wires and held in place behind wall. They needed to be joined then hidden. They gave power to somewhere else.

ANSWER : Join existing thermostat in living room wires together when replacing with nest.....


Thanks for your help... anyway....

I believe I only used two...Nest never mentions what to do with your old wiring.

Just a hint....make sure you when you drop the wires behind the wall you attach a wire incase you need to grab them back.

Thanks for the quick reply. Sorry for the confusion, actually my heating is working..but hotwater is not working.. here is the link to my drawings //www.diynot.com/diy/threads/n...-potterton-ep2002-installation-advice.471560/ Thanks for your help.

 

[Echo the husky]

I am facing the same problem. I have prt100 thermostat. Should I connect all the three wires and put them behind the wall ? Or only two. Please help. Thanks

You can't just stuff live wires into a wall. Find where the stat cable is wired back to, fully disconnect it, and put a link where the old stats live and switched live wires were.