The TRV engine does not stop

If it's in AP mode you can connect to it with ip in your browser and enable factory reset in settings, or enable calibration process.

I have the same Problem. It also doesn't show any UI and does not react to any Button press. It just continues Buzzing.

I really hope it is not destryoing itself through it.

I let the battery run empty in the hope, that it hard resets itself. I'm not sure if there is an easy way to open the case and reset it without voiding the varranty?

(having no mechanical hard turn off button is kinda a design flaw imo)

Have you tried holding the start button next to the USB port for long time? 10-30 sec?

Zitat

Have you tried holding the start button next to the USB port for long time? 10-30 sec?

Yes. it is not responding to it. Buzzing continues and Display shows nothing. AP is also not on