Vaillant Water Pressure Sensor
The Vaillant Water Pressure sensor is a part that detect pressure digitally and relays back to the boilers electronics. There have been a few versions of this part, mainly used in the ecotec series of boilers. The pressure sensor was originally located inside the boiler at the bottom left corner. In newer version boilers it is now located just below the heat exchanger, on the inlet pipe, whereas previously it was located on the outlet.
The new type pressure sensor is the newer black ecoTEC part 0020059717 (was 253595). In its correct functioning, the pressure sensor will display an approx 0.3 bar increase when the pump is activated. This can be seen in the pressure menu of the vaillant ecotec.
0020059717 (newer black ecoTEC sensor) Buy on Amazon Buy on eBay
The older pink/brass type shown below is 2000801911 / superseded. Live Buy links are for current OEM 0020059717.
Part numbers must be checked by a Gas Safe professional against the boiler GC number before ordering or fitting.
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Older Version
The Vaillant ecotecs older version pressure sensor had a smaller hole compared to the newer type, therefore is got blocked more frequently. It is shown with a pink and brass casing, rather than the newer all black version.
