Bracket, you can access the internal spring which sets the sensitivity.For example, by using a very light spring (ie, one that provides just enough force to return the diaphragm to its un-triggered position when the. Pressure is removed), it's possible to get a switch to trigger at just 5cm of water (~0.5kPa or 0.08psi). The external adjustment would then typically give a range of about 5cm to 7.5cm of water, but of course, this will vary depending on the unit and the spring used. Put in a stiffer spring and the adjustment.
There are a few ways to tell if the water heater element in your washing machine might not be working and only one way to know for sure, I will go over some of the ways you can use to tell if your washing machine water heater element might not be working and also explain the 1 method you can use to to tell for sure if your element has developed a fault or not.