Hi guys. Got some curious behavior.
HA (automation) switches the TRV from off to heat to off to heat...
As I changed the TRVs (Bosch to Sonoff) a few days before, I first thought, it is the new one. Looking through the logs, it also happened with the old one. I am not sure, but it looks like it happens since the last HA Update. Currently running 2025.1.4.
The automation checks on every room-temperature change if it is over or under the target temp. It switches from heat to off after the room has reached the target and switches from off to heat if the temp is under the target.
For example a is 20°C, it happens between 20°C and 21°C. If the setting is heat and the temperature is between 20 and 21 the TRV is switched to off or the other way, if it is on off. I tried to round the temp, but this does not change the behavior. It is always switching to the other setting in this 1°C range. If the room temperature in this example is over 21°C it stays off. Under 20°C it stays on heat.
I never noticed this before, so I think something has changed with 2025.1 but I don't know what and can't find a solution.
Maybe somebody can point me in the right direction to find the error.
They are Sonoff TRVZB. Bosch changed the firmware and with 3.7.4 the TRVs startet to recalibrate and reboot at random times. Sometimes 15 minutes in a row. Bosch said: Thats your valves, change them, not our fault.