Whether you are performing a boiler control replacement or upgrading a hydronic heating controller

For technicians servicing LF009M2 or standard series 009 units

Simplified Serviceability: Compact draft inducer blower design streamlines installation for technicians

This specific model comes with a fixed bracket for stability

the switch is calibrated to open the circuit at 180°F to prevent heat exchanger damage and automatically reset once the temperature drops to 150°F

Viessmann 7819967 Sensor 322055-301 Whether you are performing aThe Viessmann 7819967 Sensor is a critical NTC thermistor engineered for precise temperature monitoring in Vitodens 200 W and Vitodens 100 W series condensing boilers. This dual purpose component functions as either Sensor #3 for boiler water temperature or Sensor #5 for Domestic Hot Water (DHW) tank monitoring. Designed to provide high accuracy resistance feedback to the Vitotronic control platform, it ensures the burner modulates correctly based on