When pressure readings become inaccurate

common in high-cycle commercial HVAC and residential heating applications

this board requires the specific model and serial number of the unit at the time of order

or a complete lack of airflow while the thermostat is calling for heat or cooling

Viessmann 7858519 Assembly 322838-753 When pressure readings become inaccurateThe Viessmann 7858519 Ignitor Flame Sensor Assembly is a critical OEM component designed for high performance combustion control in industrial and commercial heating systems. This dual purpose assembly streamlines maintenance by integrating the electrode responsible for generating a high voltage spark with a precision flame rectification sensor. By providing real time feedback to the ignition control board, the 7858519 ensures safe burner operation