vitopend

For some reason my boiler stopped heating the radiators, hot water running fine. A month ago when it happened i kinda played around with pressure, i drained few liters of water so it would be at 0, then put pressure to 1 it worked for 3 weeks, then happened again same trick didnt helped. I...

Hi I bought MH1823 TuYa Smart Wifi Thermostat and i'm wondering how to connect it to my boiler. Current thermostat wiring: Vitopend schema: I didnt check the cables inside the boiler, i'm not a professional just wondering if its possible. My current thermostat has only No and COM cables...