Washing Machine Diagram / August 18, 2018 / Sutton Satterfield.
Typically, washing machine pressure switches have a large sensing diaphragm that's about 60mm or so in diameter and three quick-connect male terminals. One connection is common, while the others are for normally open (NO) and normally closed (NC) connections. A set-point adjustment mechanism is built in (it's directly controlled by the 'water level' knob) and the switch opens and closes with audible clicks.
A defective water heater element prevents the water from heating in a washing machine. Some hints are provided in this content to check whether you have an out of order heating element in your washer. There are ways to make sure if you have a water heater element in your washing machine, which is not working. If the fuse or circuit breaker blows within a few minutes of turning on your washing machine, there is a chance the fault is with the systems heating element.
(Note that if the washing machine has digital controls, rather than a mechanical switch, it almost certainly uses an electronic variable pressure sensor to detect the water level. These three-wire sensors are easy to interface, but we'll leave them for another time).
The direction of rotation can be controlled as shown in Fig.2. When switch S1 is in position A, coil L1 of the motor receives the current directly, whereas coil L2 receives the current with a phase shift due to capacitor C. So the rotor rotates in clockwise direction. When switch S1 is in position B, the reverse happens and the rotor rotates in anti-clockwise direction. Thus switch S1 can change the rotation direction.