nest 3rd gen

  1. A

    Installing nest 3 on combi boiler with unvented indirect cylinder.

    I got the nest to work great with the heating of the house (gas boiler), but the hot water for the house stopped. So no idea what happened. This made me think I should connect 4 to 10 on the main wire box as that is how the nest can talk to the water tank. Is this wrong? 20211106_162911 by...
  2. D

    Nest Wiring issues 3rd Generation

    I have a Nest 3rd Generation heatlink and thermostat which is connected to a y plan system that includes a Baxi solo boiler, grundfos pump and a Drayton mid point actuator all wired as labelled through a Drayton LWC1. My issue is that regardless of what I do the heating is on. The thermostat is...
  3. Murrell

    Nest - No power to existing thermostat

    Hi Everyone, I have replaced my existing Myson MEP2C with a Nest 3rd Gen. Everything went well, except there seems to be no power to the existing stat where I was planning on hard wiring the new Nest thermostat. Here is the wiring setup before at the conrol where: 3 = HW on 4 = CH on Here...
  4. E

    Is it possible to replace Altech model ALTHC007 with The Nest Learning Thermostat (3rd gen)?

    Hi All, I am looking to replace my old thermostat Altech (model: ALTHC007) with The Nest 3rd gen. Is this possible? It is connected to a Worcester boiler. All details on the pictures, let me know if you need anything else. I have no electrical knowledge beside common sense :) Kind Regards, E
  5. A

    NEST Thermostats Installation

    Image by A-J-P posted 6 Apr 2021 at 2:39 PMEF8D30D6-A19C-4199-AE01-91F196EF1A9D by A-J-P posted 6 Apr 2021 at 2:39 PMB3851C9F-408D-45A1-AC33-10150AE47EBE by A-J-P posted 6 Apr 2021 at 2:39 PM1DF1C3F7-7CDF-44BA-817D-CC6F02558549 by A-J-P posted 6 Apr 2021 at 2:39 PMImage by A-J-P posted 6 Apr...
  6. B

    Are my 2-Port Valve wired incorrectly? Kettling problem.

    Greetings all. I'm after a bit of advice as we have an issue with our HW kettling and on closer inspection the wiring on our 2-port Valves looks a little suspect to my untrained eye. Background: The house was built in 2001 and has an 'S' CH/HW System installed. If the HW is on and the CH is...
  7. Niall70

    24v myson ufh with nest thermostat

    Hi guys have 24v myson ufh manifold system set up with 2 zone with actuators. I want to control the zones with nest thermostats I have a cat 5 at the thermostat so that sides all good but I want to know what I need to run from the nest junction box to the manifold. Can anyone help? Cheers
  8. Ash D

    Replace Honeywell ST6400C With Nest

    Hello all, Now that I’ve had an unvented cylinder fitted, I’m considering having a Google Nest (3rd Generation) thermostat fitted. I’ve read a few threads on here by others who also wanted to replace a Honeywell ST6400C controller (with room thermostat, hot water cylinder thermostat and a heat...
  9. A

    Combi Boiler to Nest , Please help!

    Hi all, Hope you are all well. Am trying to install a nest 3 gen in my flat with a combi boiler. I have a Honeywell timer ST6100A with a frost room thermostat and a combiner's boiler 24i green star junior. The timer controls hot water and the room thermostat controls central heating. I need help...
  10. B

    Advice/confirmation for Nest install for Greenstar 30DCi classic boiler with Integral Diverter Value

    Hi all, I have read several posts and searched the internet and believe I have now got the correct procedure to install a Nest for my Greenstar 30DCi classic boiler with an Integral Diverter Value with a DT20 timer. If I could just get a second opinion, before I proceed it would be really...
  11. adamfozz

    Gravity System But Programmer c-plan???

    Hello Everybody, I just cost myself a call out trying to work out the heating system in my new house but oh well! I have an old Worcester boiler (oil fed) with a gravity fed system. So, I wanted to install a Google nest third gen and went into the Honeywell programmer expecting to see the...
  12. ChingiZ

    Nest Thermostat E. How does it work with underfloor heating.

    Hi. So Combi Boiler Heating type: Water Underfloor heating, Only one Zone. Nest type: Nest Thermostat E (Images For Reference) Just received the Nest Thermostat E and trying to replace it instead of the OLD Thermostat, but I am having some difficulties with connecting the underfloor heating as...
  13. smunir

    Replacing Salus RT520TX wireless thermostat with Google Nest

    it's a Alpha E-Tec 33 combi boiler. We have a Nest 3rd generation thermostat waiting to be installed and I was considering having a go installing it myself but just want to ask opinion on here first then decide whether or not to get a professional to do it. There is a fused spur going into the...
  14. V

    Connect US Nest to Vaillant Ecotec Plus 618

    I have a US Nest Learning thermostat that I want to connect to my Vaillant gas boiler (Ecotec Plus 618 - Vu186/3-5 R1). The boiler accepts both 24V and 230V thermostats as well as eBus. Below I am attaching a diagram with the connections as well a photo from my Nest Thermostat Installation...
  15. L

    OpenTherm using a wireless Nest

    Just thinking ahead to my next boiler, which will probably be a Baxi 800. On a Baxi to use OpenTherm using a Baxi uSense smart controller, the controller has to be hard wired to the boiler, which is no good for me. Looking at the Nest, it appears the hard wiring only goes to the Nest Heat Link...
  16. D

    Nest Thermostat

    Hello, this must be a fairly easy, yes or no type of a question. i just replaced Nest with a Tado leaving my Nest thermostat redundant. I was wondering if i can use the Nest Thermostat to be a standalone device just showing me the time and weather as it is not connected to the heatlink. Regards.
  17. M

    Replacing a Salus iT500 RX with3rd Gen NEST and Worcester 30CDi conventional boiler

    Hello, my Salus wi-fi Gateway has finally died and it's time to replace the unreliable system with a Nest. Could anyone advise on wiring the Nest heatlink to replace the iT500 RX receiver unit please? The current wiring is as per the images attached, as follows: 1. Red cable from CH COM to CH...
  18. SirMario

    Help Needed - Nest Thermostat replacing a Danfoss TP9000

    I have been spending a lot of time at home (due to the coronavirus epidemic), and I decided to take the plunge, learn something new and replaced my Danfoss TP9000 with a nest thermostat 3rd generation. After reading a lot of forum and posts online I was pretty confident that it would be easy...
  19. H

    Vaillant Ecotec 824 Plus with new Nest thermostat

    I’ve recently had a nest 3rd gen thermostat installed into this boiler, seemed nifty at the time however, this replaced no previous thermostat (we used to manually switch it on and off and there’s a panel at the front with a analog timer). So the nest 3rd gen replaced this. It’s been a few...
  20. Finn-uk

    Nest - again sorry from ESI

    Hi I’ve bought a new build (I know!) and it has two heating zones controlled by ESRPT5 thermostats. the motor valves are in a cupboard upstairs wired into a white box on the wall. I opened the box today to look at the wiring for moving to nest and found this...