Hello, I have a problem with 2 of my 4 KE100. It seems like they don't close the valve correctly as the radiators are hot 24/7. Both thermostats worked perfectly until a few days ago. I use the batter

I have been using the KE100 kit since December 6, 2025. It worked fine at first, but since December 22, it has been acting up. I have reset and recalibrated it several times according to the instructi