Update climate.py

[rovingclimber]

Updated references to constants deprecated in v2025 as component no longer loads once you upgrade HA core >2025

[Nermal]

thanks for this - I'm experiencing the same issue since upgrading

[ric355]

I'm curious as to why this change has been made as part of this pull request. It actually changes the behaviour of the component. After this change, the heating status depends on the current temperature relative to the target temperature, which on the face of it you might think is OK. But the problem is that the Salus device has a hysteresis (mine is 0.3c).

Here's an example:
Current room temperature 18.5c
Target temperature 18.0c
Heating off

Here, assuming the heating stays off, the room temperature will fall. When room temperature hits 18.0 the HVAC action will switch to HVACAction.HEATING with your code. But in fact at this point the Salus device will not actually turn on the boiler. It will only do that when the room temperature hits 17.7c due to the 0.3c hysteresis.

The effect of this change is that the history chart is "wrong". It shows the heating as coming on as soon as the room temperature descends to the target temperature. So the heating shows as being on for a longer period than it actually was.

The original code is correct; the boiler status comes from the _status varible being ON (originates from CH1heatOnOffStatus in the Salus web service response).