topic Re: Boiler wont stop despite thermostat in Nest Thermostats

Boiler wont stop despite thermostat

JCollis — Thu, 21 Dec 2023 09:14:12 GMT

My thermostat is set at 14 C overnight but the boiler keeps pumping out heat so it was 24 C at 5am. The only way to stop the heating is to turn off power to the boiler .
I installed Nest a month ago and so far my gas consumption is double what it was with the previous system.

Re: Boiler wont stop despite thermostat

Frustratedddd — Thu, 21 Dec 2023 12:40:57 GMT

My first question would be who installed the thermostat? Are you UK?

Are you saying that the thermostat display shows the reading as 14C, and has a black colour display not orange, but the heating is still running? Can you hear the pump running even when the thermostat is set to off? Check this at the display not the app.

Re: Boiler wont stop despite thermostat

JCollis — Thu, 21 Dec 2023 20:39:05 GMT

yes I can see the boiler is running and the radiators are hot . I have rebooted the Hub but that doesn't change anything. The thermostat says the heating is off but it isn't.

Re: Boiler wont stop despite thermostat

JCollis — Thu, 21 Dec 2023 21:59:02 GMT

seems loads of people have the same problem and Google provides no sensible answers.

Re: Boiler wont stop despite thermostat

Frustratedddd — Thu, 21 Dec 2023 22:44:27 GMT

Yes I agree, and who installed your thermostat?

You say reset the hub, do you mean the Heat Link?

Re: Boiler wont stop despite thermostat

JCollis — Fri, 22 Dec 2023 15:03:51 GMT

Yes. Turned power off. Have now moved thermostat closer to the Link and reconnected. Thermostat is set to 17 says temp is 18.5 , green leaf shows but boiler still going strong.

Re: Boiler wont stop despite thermostat

JCollis — Sun, 24 Dec 2023 10:20:14 GMT

Yes I’m in the uk so thermostat communicates with the Link which controls the heating/ hot water pumps.

Re: Boiler wont stop despite thermostat

JCollis — Sun, 24 Dec 2023 10:25:21 GMT

Yes the Heat link. I power it off. I’ve made some progress moving the thermostat closer to the Link (10ft) . It seems to turn off the heating now but now the hot water doesn’t go on when the heating is off despite the schedule. If I hit ‘Boost’ on the HW the heating goes on as well even if the temp is well above the thermostat setting.