On-off sensor De Dietrich 7656981

An on-off sensor is a simple yet critical device that detects the presence or absence of a condition, such as water flow, pressure, or flame, in a heating system. It sends a signal to the control board to activate or deactivate the burner, ensuring safe operation. If your boiler fails to start or shuts down unexpectedly, a faulty on-off sensor might be the issue. Replacing it with this sensor can restore reliable performance.