Product Information: The flow switch acts as a safety device. It is a switch with an in-built sensor that sits in the pipework for both the central heating and DHW systems. When the pump is turned on, the flow switches senses this movement and feeds the information back to the electronic control, allowing the ignition sequence to progress. The function of the flow switch is to make sure that the burner cannot switch on whilst the system is low on water or dry.
This part is present in 39 different boilers in the Vaillant range including the Vaillant TURBOmax PRO (2001-2002), TURBOmax PLUS (2000-2001), TURBOmax PLUS (2001-2002), TURBOmax PRO (2000-2001), TURBOmax PRO (2002-2008).