Baxi Flow Switch

The flow switch acts as a safety mechanism. It is a switch with an in-built sensor that sits in the pipework for both the domestic hot water and heating systems. When the pump is activated, the flow switches senses this movement and feeds the information back to the printed circuit board, allowing the ignition sequence to progress. The function of the flow switch is to make sure that the burner cannot switch on if the system is dry or low on water.