nest 3rd gen

Hi, I am trying to fit a Nest 3 from the existing wiring in the Honeywell ST9100A unit. I replaced the wiring like for like and taped the earth. The Nest powered and the Heat Link clicked but the boiler did not fire up. There is a wall thermostat fitted which I will leave there and use the...

Good morning everyone, I know there is many a thread on this sort of thing but the issue i am having is a strange one so i wanted to double check what I have done. I replaced my danfloss programmer with a nest about 6 months ago. It works as expected so programs, call for heat and water all...

Hi Ive just installed a nest v3 Thermostat to control heating and hot water on my existing system which is Potterton Suprima 100L Boiler Honey well ST6400C Programmer Honeywell v4073A mid position diverter valve The old system didn't have a main thermostat , just TRV's on every radiator. I've...

Hello all i have the GLOWWORM FLEXICOM 30cx combination boiler, i have bought the Nest V3 smart thermostat , i have wired up the boiler and the thermostat as far as i know correctly from the diagram with the nest instructions This is the fused power switch to the boiler the white sheathed...

Hi all, I am looking at upgrading to a nest thermostat but I am a tad useless so need some help. I have a Potterton ep2 controller and Potterton suprima boiler. Will this be compatible with the nest 3rd gen thermostat? Please let me know if you need more information! Thanks in advance and...

Hi, I'm looking for some advice on a new Nest V3 Installation for hot water and heating control. I currently have a Y plan system with the following components: - Boiler - Ideal Classic FF350 in the utility room. - Programmer - Danfoss FP715 (below the boiler). - Danfoss - thermostat in the...

Hello, I'm after a little help on wiring a heat link into a Baxi Duo Tec 33 Combi boiler please.. There is a wireless Salus RT501RF RF (XL) installed at the minute. Removing that is simple, it's figuring out the call for heat terminal that I'm struggling with! I'll and attach photos of the...

Hi can someone help! Our boiler man has brought in an electrician and both seem to be lost. Is it possible to have a nest setup to work our UFH setup.Any help would be greatly appreciated. Our Combi boiler is a Glowworm Ultimate2 35c. We now have 2 two port valves installed after the boiler...

Hi, I have what seems to be a complex system with a Worcester Greenstar RI condensing boiler, a hot water tank with two pumps for HW and CH, a Horstmann C21 programmer, linked to a Drayton Digistat+ wireless thermostat. I'd like to replace them with a Nest V3, but I discovered a nightmare of...

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