The pressure switch is one of the most problematic parts of the washing machine. It is because of this frequency that it is important to know how to detect defects in this component to perform an efficient service.
Do you know the main mistakes of this piece? If not, stay tuned!
1. What is the pressure switch?
2. What are the pressure switch components?
3. The main defects of the pressure switch
4. How to tell if the electronic board is good
5. How to do the continuity test?
What is the pressure switch?
The pressure switch is responsible for identifying the water level inside the washer and sending this information to the electronic board.
As the water rises inside the tank, air pressure builds up and through this pressure; the pressure switch can measure the water level.
What are the components of the pressure switch?
The best way to fix something is by knowing its operation and each component that forms it. With this knowledge, it is much easier to detect defects and make repairs successfully.
The components of a pressure switch are:
Let's go to what matters! The main defects of the pressure switch.
Have you ever had to deal with a non-stop washing machine? This is one of the most common defects of these devices!
In such cases, it is common for the problem to be identified in the pressure switch hose. If it is bent or punctured, the part will not receive air pressure and will not be able to identify the level correctly.
Another frequently occurring defect is when the machine does not stop throwing water to centrifuge even when there is no more water in the tank. This problem may also have to do with the pressure switch.
If the airbag is clogged as a result, it may end up trapping water in the hose. With this, the pressure switch will understand as if there was still water to throw away in the tank.
Since centrifugation only starts when you receive information that there is no more water inside the machine, this process will never happen.
There is a simple tip to know if the cushion is dirty and blocked air:
Fill the washer tank with water;
And the electronics? Is it good?
The wiring is responsible for taking the information straight to the washer's electronic board. To know if it is working properly, a continuity test must be performed with the aid of the multimeter.
How to do the continuity test?
The continuity test shows if there is information passing between the lilac wire and other wires with the plate. This test tells you if the pressure switch is sending information to the electronic board.
First, to perform the test you must set your multimeter to the continuity option and then connect the black probe to the purple wire and the red probe to the other wire.
After this process, blow the pressure switch hose to simulate the washer air. If the multimeter beeps, it is because the electronics on this plug is working properly.
Now repeat the first step, but reverse the contact of the test points with the wires. If it makes no noise, it is because the pressure switch is not sending the information to the board.
In addition to the multimeter, there are a number of tools, which are critical to making the technician's job easier and faster.