How to change the noise filter in a washing machine

When hearing the phrase noise suppression filter, many people do not somehow associate it with an automatic washing machine. In fact, this is nothing more than a surge protector or, as it is also called, a capacitor, a semiconductor part that is installed on the washing machine on the power cord. Why this filter is needed, how it works, and most importantly, how to change it correctly, we will talk about this in the framework of this publication.

Working principle of the part

It is quite difficult to find an ideal electrical network in the world. Periodic interruptions in such networks often occur in both Europe and well-fed North America. There is nothing to say about the CIS countries; in our country, due to power surges and all sorts of other failures, tens of thousands of units of various household appliances, including washing machines, burn every year. A modern automatic machine has a sensitive electronic module that can fail if the slightest problem arises.

So, in order to protect the electronics of the washing machine, engineers install a surge filter on it, which evens out small voltage surges. It does this very effectively, although the part cannot cope with major interruptions, so experts recommend that the user additionally protect the “home assistant” using stabilizer for washing machine.

If a major power outage occurs, the surge protector stands up to protect the electronics of the washing machine and, as a result, burns out. It cannot be repaired; it will have to be replaced.

How to get to the burnt part?

If we suspect that the reason for the failure of the washing machine is an interference filter, we need to get to it in order to check this part and replace it if necessary. To get to the burnt part you need to:

• disconnect the washing machine from communications, especially from the electrical network;
• remove the top cover of the washing machine;
• look inside the case to where the network cable fits;
• we need to look for a part that looks similar to the one shown in the picture below.

In order to get to and see the noise filter, it is enough to use only a screwdriver, but to check the burnt part we may also need a multimeter. Read on to learn how to check and replace this part visually and using a multimeter.

Check and replacement

Having discovered a semiconductor part that interests us, we must immediately begin inspecting it. Often a burnt capacitor reveals itself by burnt contacts or simply an unpleasant odor emanating from it. In 98% of cases, the part can be changed without hesitation. If the breakdown is not so obvious, arm yourself with a multimeter and start checking.

1. Set the multimeter to ringing mode.
2. We lean the probes of the device against the contacts of the capacitor.
3. We check the presence of voltage first at the input and then at the output.

If there is no voltage at the output, the part is faulty and needs to be replaced.

Replacing the noise suppression filter of a washing machine can be done very quickly even by a non-professional, the main thing is to have a suitable working part on hand. As a rule, you don’t have such a part at hand, so we pull out the old surge protector from the connector, disconnect it from the power cord, or put it away along with the power cord and go to the store. At a specialized retail outlet, we show the seller the burnt-out capacitor of the washing machine and ask to sell the same one, most likely they will find a replacement for you without any problems.

Then all we have to do is bring the part home, plug it into place, and then assemble and connect the washing machine to the communications. After all the above manipulations, the washing machine should work without problems. Good luck with your renovation!

1 reader comment

1. 03/12/2018 at 11:14

   Michael:

   What are you writing? How do you measure voltage in ringing mode? While still in the socket, try it on in this mode!

   Answer