NTC Temperature Sensor, Vaillant VR20, Vaillant Solar - PHC Parts
NTC Temperature Sensor, Vaillant VR20, Vaillant Solar - PHC Parts
Vaillant VRT 260F Radio Room Thermostat 868 MHz with Vaillant VR44 Radio Receiver and Instructions for Use [may not be in English] : Amazon.de: DIY & Tools