Yes, i was i bit confused with the traces. If u need, i’ll share some more.
The window sensor shows on during the switches. I didn’t observe that the sensor reports any strange states. Afaik it reported all the time, that the windows is open.
If the traces are all in the time window where your window was open there is definitely a problem with this sensor.
For testing you could navigate to your dev state menu.
Filter for your window and click on the entity_id.
And set the state manually to on. Then watch your thermostat if it’s still toggling between hvac modes.
Could you post a screenshot of the logbook of the automation when the window was opened? Just filter for your automation. And maybe of your climate entity, too.
//EDIT: Give this also a try: Disable your AHC -Automation and turn off the thermostat manually in your UI.
i am not sure if this answer is related to my thermostat
I have also noticed this behavior with the bathroom automation.
After disabling the automation, the thermostat is still in off mode
I know the problem! Just disable the experimental features please! Physical change ect. That’s a side effect because there is still a bug in home assistant!
//EDIT: But good to know. Maybe i will block that physical change feature if window is opened.
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I disabled this feature and made a test. Unfortunatly i can’t confirm that this’s the issue. The behavior is still there 
I’d just wrote you a DM here so we don’t spam the thread. Just write there back if you’re ready.
But I think we have to start from scratch:
Could you disable all your AHC automations and create a new one. Just setup your thermostat and window please and give it a try.
Hi!
Thank you for your hard work @panhans I’m testing the v4, but in production I still continue with v3.
The v4 blueprint does not recognize the new proximity integration released with HA 2024.2, right?
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It should. It’s the same integration but only the configuration moved to UI.
Thanks for reporting. I will check this.
I’m obvious blind or stupid, where can i find the DM? And i cant write u one 
I deleted all my AHC automations, rebooted HA and created a new one for the bathroom, Setup only the valve and window, but the issue is the same
Me again. Proximity still works for me. Whats the entity_id of your proximity sensor? Mine is like proximity.home.
I don’t have it. Maybe because i’m e new user?
I added as new with the new UI configuration, and It doesn´t create any proximity entitie. It only create 1 service and 7 sensor entities
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Oh, you’re right. Don’t know why it keeps the old configuration. I would migrate this to the new sensor. But it needs some time because it’s not only one entity anymore. 
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Hi, I’m using the Pirate Weather integration in my HA instance, do you know how I can access the temperature sensor property for use as the Outside Temperature Sensor? Many thanks