My Vaillant Ecotec Plus does not get activated with my newbought Tado V3+
First I connected my Tado on the wall with the 2 wires in + en -
Everything connected and paired with my Wifi.
I opened my Vaillant and did the connection with 'bus' and the configuration. But the heating isn't working. Then I tries on the 24V = RT connection and did the other configuration. But still nothing happens.
Yesterday, with my old thermostat on the wall everything worked perfect.
Can somebody help my out place. It's becoming really cold.