12-16-2023 02:40 AM
Our thermostat won’t call for heat. It was installed 2 years ago and has worked flawlessly. It dropped offline and since it went back online it has stopped calling for heat.
12-16-2023 02:17 PM
Hi - can you confirm the following from the Nest menu - if it is powered on, go to Technical -->Power and reply with the power output/charge for the thermostat? To communicate with the Nest (Wifi) and send control to your furnace, the Nest will need a 'Battery' level (shown in this menu) of 3.85 V or higher.
J
12-17-2023 01:37 AM
Yes the nest has power, as does the hub by the boiler. When I press the button on the hub it doesn’t turn on the heating either. The boiler is working well as hot water still is called from the taps. Maybe it is a hub fault.
12-17-2023 10:01 AM
Right - can you confirm the voltage/power going to the Nest Technical -->Power menu(power is critical for the Nest to operate properly - not just "turn on")?
J
12-18-2023 09:37 AM
Hi J,
Thank you for your help.
I am afraid I do not know how to do that. The nest was set up by a professional plumber and has worked perfectly for 2 years. It has just stopped after the firm ware update, it dropped off the wifi, is now back on the wifi and it appears that all has happened from this update is it has now broken.
12-18-2023 09:42 AM
Sorry so followed your instructions and battery is 3.912v
12-18-2023 10:03 AM
Hi - ok that voltage level is sufficient so if it is not calling for heat, there could be an issue with the control wire (W1) going to the boiler/heat control. I would recommend having a plumber/HVAC inspect this wiring and test controlling the system (manually) using that wire/connection without the Nest.
J
12-18-2023 10:57 AM - edited 12-18-2023 10:57 AM
Hi folks,
Thanks for chiming in, @jb76.
@Williamhaz, yikes! I'm sorry to hear that your Nest Thermostat won't call for heat. Let's see what's going on. A few questions:
Best,
Zoe
12-18-2023 11:05 AM
Hi Zoe,
Thank you for your in depth response, please see m response below:
12-20-2023 01:58 AM
Thanks for all the info provided. Is there any LED light on the Heat Link at this moment and if yes, what's the color?
12-22-2023 08:16 AM
Hi there, just checking in with you. Did you manage to check the last message?