Some “heating” activations aren’t displayed when using heatmiser profiles

[mnbf9rca]

I’ve been using the heatmiser profiles for about 12 hours - you can see the break in the schedule where I switched over to v3 and reprogrammed them circled. What I notice is that some “heating” events aren’t being reported - eg where the temperature starts rising around 5am today. Presumably that’s the “optimum start” feature on the thermostats themselves. This is consistent across all of my thermostats.

[ocrease]

Hi @mnbf9rca, you are correct, when the thermostats are in optimum start, this integration correctly sets the hvac_action to preheating, but unfortunately the home assistant history chart (in your screenshot) has a limitation that it doesn't fill the chart when preheating, only when heating. I suggest you raise a feature request in the Home Assistant frontend repo.

In the meantime, you can use the preheat_active sensor provided by this integration to see when preheat/optimum start is on.

There are also new controls available (hidden by default) to control various parameters including the optimum start period.

[ocrease]

@mnbf9rca do you need any more help with this issue or can it be closed?

[mnbf9rca]

i assume it's this which needs to be changed?

[ocrease]

@mnbf9rca yes I thinks that's the right place. I haven't played around with a dev HA ui, but the docs make it sound simple enough. If I get some time I'll see what I can do, but it's probably still best to raise an issue there.

[mnbf9rca]

I've raised home-assistant/frontend#23876

[ocrease]

Awesome thanks. It's something that's bugged me in the past, but not enough to do something about it!

[ocrease]

The change in Home Assistant has been released in 2025.2.0. Preheating is now filled in the charts in the same way as heating.