I got a Nest installed by Electric Ireland last year.
All has been working fine until recently. Sometimes the hot water does not come as scheduled at 06:30. I’ve done resets and restarts and set up schedules again but it still seems to happen randomly.
This morning at 06:42 the app said the hot water was off. I checked the boiler and it was off. Then I went to check the thermostat itself. As soon as I approached it and it woke up, the boiler fired and the app said the hot water was on until 07:30 as scheduled.
Have you come across this before? Can you please advise?