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  1. R

    Nest 3rd Gen - No Hot Water Control

    Thanks again Ian. I watched the video. Seems like all ok now
  2. R

    Nest 3rd Gen - No Hot Water Control

    Sorry Ian, just saw your post after my latest reply when I thought everything might be ok now. Can you tell me where the Gravity/Fully Pumped setting is found. I’ve been through all the Equipment and Pro Setup screens and can’t see it. I think it might be working ok now. On the Nest App it’s...
  3. R

    Nest 3rd Gen - No Hot Water Control

    Feeling embarrassed now but I thought Hot Water “Not Connected” under Equipment - Pro Setup was a status rather than an option that could be changed. It seems to default on that but I’ve changed it to On/Off and now the HW Boost and schedule are showing up on the Nest app. Thanks for your kind...
  4. R

    Nest 3rd Gen - No Hot Water Control

    Thanks very much Stem and Ian I don’t think there’s a wireless thermostat for the HW cylinder. Looks like there’s just one strapped onto the cyclinder itself (Honeywell L641A1005 - grey box with a black temp dial). Will look into the Nest settings to see how to change it to fully pumped. Don’t...
  5. R

    Nest 3rd Gen - No Hot Water Control

    Hello I managed to replace our old Honeywell ST9420C and wireless thermostat with the Nest Learning Thermostat V3 using the following wiring layout: Honeywell-Nest N-N L-L, 2 & 5 4-3 3-6 Previously, on the old Honeywell programmer there were just 4 wires - N, L, 3, 4. This is working fine...
  6. R

    Replacing Honeywell ST9420C and Wireless Thermostat with Google Nest

    Sorry, The last couple of photos of the boiler wouldn’t upload before but here they are. Thanks 71A2CBB0-67AC-460F-871A-A4018234D8DA by Robert de Castro posted 22 Nov 2021 at 7:23 PMB21E219D-F865-4112-BD61-20141EEC9469 by Robert de Castro posted 22 Nov 2021 at 7:23 PM
  7. R

    Replacing Honeywell ST9420C and Wireless Thermostat with Google Nest

    UPDATE: Now resolved this myself, thanks to earlier post by Muggles. I just forgot to put the additional live connections to T2 and T5. Silly mistake on my part but all working fine now. Hello I’ve just bought a Google Nest Learning Thermostat v3 to replace our old setup. Sorry, I know there...
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