Amazon.com: Viessmann 7839747 Flow Switch for Vitodens B2TB/B1HA/B1KA/B2HB/B2HA Series Boilers : Arts, Crafts & Sewing
VIESSMANN Manufacturer's no. 7450155 control unit S with instruction manual (may not be in English), officially unused, new in open original packaging, was a replacement part : Amazon.de: DIY & Tools
Amazon.com: Viessmann 7839451 Ionization Electrode with Gasket for Vitodens 200-W Series Boilers : Tools & Home Improvement
Amazon.com: Viessmann 7844988 Ignition Cable 5K OHM for Vitodens 100-W B1HA/B1KA Series Boilers : Tools & Home Improvement
VIESSMANN part no: 718 7088, Vitotronic 200, type: KW2 heating control, serial no: 718 7088 602423103 with boiler sensor, tested is fully functional. : Amazon.de: DIY & Tools