nest 3rd gen

I have a 3rd gen Nest thermostat that connects to my Vaillant ecoTEC pure 825 combination boiler. I’m having an issue that I have no hot water unless the radiators/heating is on. I have to keep setting my thermostat to higher than room temperature so that I can get hot water from the tap. I...

Hi Great forum you have here. I’ve not long moved house and hope someone can identify this type of central heating circuit for me. I’m beaten. The closest I can match it too is a W plan heating system, but this uses a diverter valve which I do not have. (Standard chocolate block affair...

Hi, Just looking for a little help and guidance on installation of a nest heating system. I currently have a conventional boiler system with hot water tank. I have a Honeywell Smartfit thermostat system; the wiring is basically specialised so not able to “plug and play” the nest system as it...

Hi, I have bought a Nest 3the generation and i'm struggeling to connect it to the Vaillant 286. The Vaillant is new so no old thermostat needs to be replaced. I have opened the Vaillant and to my surprise there were much more connection possibilities then expected. To which should i connect the...

hi guys. Read a lot of other posts and can see some really good help. I have a Honeywell programmer and room stat in hall. I want to change them over for the nest gen 3. Want to make sure I get it right and want some help on how todo it. Here are some pics of my wiring and system to help u guys...

Hi all First time post here, after searching the net for ever I have not been able to find any diagrams or instructions to help me replace my Honeywell gt699b thermostat with the Nest v3. Not sure what setup I have as there is a small boiler down stairs in the kitchen and a hot water tank...

Hey guys, My wife and I have recently moved into a new house this month, and in doing so had the whole house rewired. The electrician came and removed pre-1977 Steel cable from the home and replaced the whole mains. In doing so he has removed all of the bottom side of my Honeywell 10 way...

I have an Ideal iStor HE260 and have just purchased a 3rd gen Nest Thermostat. However, I'm a little confused as to whether the nest can control my boiler's hot water. The Nest documentation (and customer services) state that the Nest cannot control DHW on combi boilers. However, my...

Morning all, I was hoping somebody could help me with a Nest 3rd gen installation please? My problem is that the Hot Water comes on with the Heating, even when it's set to off from the app. My set up was: Boiler: Vaillant EcoTec Plus 630 Tank: Megaflow 210l Programmer: Honeywell ST9400c...

Hi, I am replacing the above controller with a Nest controller but am having a bit of a problem working out how the system has been wired up. It works fine so rather than mess with it I am wondering whether I can just wire the Nest in from the current wiring points on the base board of the...

Hi - I have just bought a NEST 3rd gen system and I am trying to work out the wiring diagram for which wire goes where, I would be very grateful for any advice. I have attached the photo of my Potterton EP3002 program wiring harness. 20170121_111340 by DIYer007 posted 21 Jan 2017 at 5:53 PM

Hi, I'm trying to install a Nest Heat Link it to link to my Potterton Promax SL boiler, and worried I don't fully understand the wiring on the back of my old programmer! I figure it should be fairly straightforward to swap over from my old programmer to the Heat Link, from seeing similar...

I have a grasslin tower chron QE2 and a mechanical Honeywell thermostat. Is it easy to fit the nest

I am just about to replace my thermostat with a 3rd Gen Nest . I have a Franco Belge Idris Exclusive combi boiler , with a simple thermostat. But am struggling with the wiring on the Heatlink . I'm going wire the L and N (on the Heatlink) from the boiler no problem then bridge the L to 2 on...

Hello All, I need a bit like guidance on how the nest should work on a Y-Plan setup. Had mine fitted by a certified nest installer. However for getting any real heating through the radiators I need to switch on the Water Heating as well, which is a bit strange. Also the rest position of the...

Hi all.... I think it's possible to fit a Nest to my Vaillant 828 Turbomax boiler but I'm pretty confused about the whole thing really and there are so many different threads about doing it, I'm even more confused. I must say THIS thread is useful as it discusses fitting to a 824 boiler. Part...

Hello, I'm going to replace my ESI controls and thermostats with 2 NESTS. I have 2-zone + HW GCH. I think I've worked everything out and I'm confident that I can get this done myself. On the pictures attached you can see main board and zoom on the wires that I can reuse. They are upside down...

Hi there. I am to install my nest device tonight and just need to clarify that Nest 1 = CH Off Nest 3 = CH On Nest 4 = HW Off Nest 6= HW On Also wondering if my current set up has two wires per terminal should that mean I should also have two wires per terminal in the nest devise. Any help...

Hello all Hoping to get some help here. I just got a nest 3 to replace my existing system. My boiler is Ferroli DOMIcompact F30B and a Danfoss thermonstat. I also have underfloor heating vents and fans controlled by a set of separate thermostat and control. Its a Danfoss clock thermostat...

Hi, 1st post and I'm a bit of an amatuer (can do basic wiring) so be gentle... Basically I need to wire a 3rd generation Nest Heatlink to a Vaillant EcoTEC 937. Could someone please relate the Nest instructions to the boiler wiring diagram for me? I'm not sure which Nest instructions I should...