No worries. The learning part of the schedule will only set up a schedule if you do repeated actions constantly at the same time. If you wish to try and refresh it, since it was installed for some time, to start learning again you can go to Settings> Reset> Schedule or Auto-Schedule (you will see one or the other) and then it should start the process for learning again. Just keep in mind that you have to be consistent, so every day, same temperature at the same time set on the thermostat so that it learns and adds those setpoints itself. If you have a schedule that is not always the same it would be best just to set up a schedule manually. Here you can learn more about it.
The wiring is what we would generally expect, although we usually see a bridge from the L (live) terminal on the Heat Link to terminals 2 and 5. However if the wires there are live wires that have the correct voltage that will also work. You can have a look at some wiring examples and information here.
Let us next to what we call a click test. This way we can get an idea on how the relays inside the thermostats work. Go Next to the Heat Link with the Nest app and follow these steps:
1. Select the thermostat heating controls in the Nest app and make sure the heating is set to be off, display black.
2. Turn up the temperature until the display goes orange, heating on, and listen for a clicking noise from the Heat Link.
3. Turn the temperature down until the display goes back to black and listen for a clicking noise again.
4. Go to the Hot water control section now and tap on the cogwheel in the upper right corner to go into the settings. Toggle off the first option you see there while we do the test, this disables the schedule. You can turn it back on after testing.
5. Boost the hot water and listen for a clicking noise again.
6. Turn off the hot water boost and listen again for the click.
Let me know if it clicked in each of the above situations or not.
