vaillant turbotec plus

Hi Friends, I have a problem with my boiler that I've been unable to solve in the last 3hs. I hope you can help me. My setup: Family house, with Vaillant Turbotec Plus boiler + one VRT 230 thermostat Context: It's winter (with temperatures between -1 and 11ºC in the last week). I've been far...

Hello everyone, I’m having trouble connecting the Vaillant VR940F module to my TurboTec Plus boiler (manufactured in 2015). What I’ve done so far: 1. Connected the module to the BUS terminals on the boiler. 2. Checked the voltage on the BUS — it’s 21 V, which seems...