Aqua Sensor 194819

Vaillant Aqua Sensor 194819

This part fits the following:

Vaillant aquaPLUS (2005-2010)
and Vaillant aquaPLUS (2002-2005)
with Vaillant TURBOmax PLUS 824 E
plus Vaillant TURBOmax PLUS 828 E
fits Vaillant TURBOmax PLUS 837 E
and Vaillant TURBOmax PRO 24 E
with Vaillant TURBOmax PRO 28 E
plus Vaillant VUI 362-7 (2002-2005)
fits Vaillant VUI 362-7 R3 (2005-2010)
and Vaillant VUW 242/2-3 (2001-2002)
with Vaillant VUW 242/2-3 R1 (2002-2003)
plus Vaillant VUW 242/2-3 R2 (2003-2004)
fits Vaillant VUW 242/2-3 R3 (2004-2008)
and Vaillant VUW 242/2-5 (2001-2002)
with Vaillant VUW 242/2-5 R1 (2002-2003)
plus Vaillant VUW 242/2-5 R2 (2003-2004)
fits Vaillant VUW 242/2-5 R3 (2004-2008)
and Vaillant VUW 242-3 (2000-2001)
with Vaillant VUW 242-5 (2000-2001)
plus Vaillant VUW 282/2-3 (2001-2002)
fits Vaillant VUW 282/2-3 R1 (2002-2003)
and Vaillant VUW 282/2-3 R2 (2003-2004)
with Vaillant VUW 282/2-3 R3 (2004-2008)
plus Vaillant VUW 282/2-5 (2001-2002)
fits Vaillant VUW 282/2-5 R1 (2002-2003)
and Vaillant VUW 282/2-5 R2 (2003-2004)
with Vaillant VUW 282/2-5 R3 (2004-2008)
plus Vaillant VUW 282-3 (2000-2001)
fits Vaillant VUW 282-5 (2000-2001)
and Vaillant VUW 362/2-5 R3 (2002-2004)
with Vaillant VUW 362/2-5 R3 (2004-2008)

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.