Washing Machine Diagram / August 18, 2018 / Elianna Mccurdy.
These switches also look a lot like washing machine pressure switches, except they have multiple electrical terminals (six or even nine) and don't have external level adjustment. However, some have screwdriver adjustment for both the trip levels and the hysteresis. When extracting the pressure switch from a washing machine, be careful that you don't also inadvertently
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.
(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 on-off cycle in the master timer should go on only for the set time (here it is 18 minutes). Once the master timer goes off, the cycle should stop. To achieve this, the outputs of both the timers are connected to NAND gate N1 (IC3), which gives a low output only when both the timers are giving high outputs.The output pin 3 of N1 is connected to relay RL1 via pnp transistor T1, so the relay energises only when the output from NAND gate N1 is low. As the mains 220V line is taken through relay RL1,the monitor turns off during the 3-second off period after the set time of 10 seconds is over.