topic Re: boiler on but thermostat off in Nest Thermostats

boiler on but thermostat off

bakgib — Tue, 16 May 2023 17:42:31 GMT

Hi, help please.. warm day and heating is switched off according to the nest and in fact I've switched it off completely in the app.. and it shows as being off.. but the boiler is still on! The heat link is in the cupboard where the old controls used to be and has one green light showing. I pressed the middle button and it showed the heating on manual on the thermostat so the communication between the two is fine. I switched it off again.. but the boiler is still on. Any help taken! Thanks

Re: boiler on but thermostat off

OannaCG — Wed, 17 May 2023 07:33:27 GMT

Hi there! Sorry to hear that you encountered issues with your thermostat, but I'll do my best to assist you. You should perform a click test to determine if the issue is related to your thermostat or to another part of your heating system. That being said, please go near your Heat Link and activate the heating from the app and let me know if you hear a click. After that, please turn off the heating from the thermostat and check if you can hear the "click" sound. You should hear a click when you call for heat and another click when you deactivate it.

Re: boiler on but thermostat off

bakgib — Wed, 17 May 2023 07:45:03 GMT

I've done that and there is a click at the same time as the pop of the button. The lights went on and off too.

Re: boiler on but thermostat off

OannaCG — Wed, 17 May 2023 07:51:51 GMT

Just to confirm: did you press the middle button on the Heat Link (Manual Mode) when performing the click test I've told you about previously or did you took the app and called for heat / turned the heat off and heard the "click" sound?

Re: boiler on but thermostat off

bakgib — Wed, 17 May 2023 07:52:37 GMT

If it helps, I switched the heat link off and on last night to see if that helped. When it went off, the boiler went off, but when it went back on again, the boiler just went on, regardless of the thermostat saying it was off. I think the hot water is still on too, as despite the thermostat and app saying it's off, the water is still hot. I've turned the temperature down on the boiler in meantime. It's all new and was installed last August.

Re: boiler on but thermostat off

bakgib — Wed, 17 May 2023 07:58:35 GMT

I pressed the middle button.

Re: boiler on but thermostat off

bakgib — Wed, 17 May 2023 08:01:33 GMT

Re: boiler on but thermostat off

bakgib — Wed, 17 May 2023 08:02:01 GMT

rying to post a video but not sure it's working

Re: boiler on but thermostat off

OannaCG — Wed, 17 May 2023 08:04:48 GMT

Understood. When the manual mode is activated, the heating and the hot water are always on. Please deactivate the Manual Mode, by pressing once again on the middle button of the Heat Link. When the Manual Mode is activated you should see 3 lights. When you deactivate the Manual Mode, you should see only one green light, like in the photo you sent above. Please perform the click test using the App, trying the steps I mentioned above and let me know if you can hear the "click" sound when you call for heat and when you turn the heating off.

Re: boiler on but thermostat off

bakgib — Wed, 17 May 2023 08:05:33 GMT

I'm an idiot. I did it on th eapp now. I turned the temperature up on the app and there was a click from the heat link.

Re: boiler on but thermostat off

bakgib — Wed, 17 May 2023 08:07:52 GMT

It clicks when switched both on and off using the app

Re: boiler on but thermostat off

OannaCG — Wed, 17 May 2023 14:26:27 GMT

Thanks for letting me know. I've sent you an email with a form. Please complete it with the details I need and tell me here once it's done.

Re: boiler on but thermostat off

bakgib — Wed, 17 May 2023 17:28:02 GMT

Hi, thanks for your help with this. I'll not fill out the form as the plumber that fitted the boiler came out and the fault lay with one of the pumps next to the hot water tank wasn't cutting out and constantly feeding the radiators. We're getting a new one and the heating is off now. Fingers crossed this sorts the problem. It doesn't seem to have been either the heat link nor the thermostat that was at fault. Your help has been much appreciated.

Re: boiler on but thermostat off

UanaC — Thu, 18 May 2023 06:54:38 GMT

Gotcha. Glad to hear that everything is back on track at the moment. Please don't hesitate to let me or my colleagues know if there's anything else we can help you with.

Re: boiler on but thermostat off

AlexD — Fri, 19 May 2023 10:43:46 GMT

Hey there, I haven't heard from you in a while so I'll be locking this thread. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the community. Thanks, AlexD.