Washing machine whistles after replacing the brushes

You should always be attentive to the extraneous sounds that household appliances make. If a whistle suddenly appeared in the washing machine, this is not critical but not worth ignoring. Whistling, crackling, and other unpleasant sounds often occur after brushes have been replaced on the engine. Users usually think they can do nothing about it and wait until the brushes grind themselves in, but such a wait can take a year or more. So that you can immediately start, we have written a detailed guide on dealing with this common problem.

Cause of noise and getting rid of it

Unpleasant sounds often appear in the washer after replacing the brushes if, to save money, the metal brush guides still need to be returned. It is because of this that the home assistant engine can start to spark, as well as click and whistle loudly. At the same time, this can happen even considering the high-quality lapping of brushes and grinding of the collector. Because of this phenomenon, many service center specialists refuse to partially change the brushes partially, insisting on replacing the carbon elements with the guides. As a result, customers often need more time to be satisfied after repairs due to loud, unpleasant noise during the work cycle.

Everything is connected with the fact that the old brushes, during washing, strongly loosen the guides and a backlash of about 1-millimetre forms. Therefore, during operation, the motor whistles and crackles when it rotates in one direction and remains silent when it rotates in the other direction. In addition, the angle of contact of the carbon brush to the collector changes for old elements, so there is also a sharp sound. Plus, the brushes' wear and the engine's power consumption increase. Because of this, the brush will soon have to be changed again.

So that after replacing the brushes, a whistle does not appear, service center specialists advise pre-compressing the guides with a brush placed inside with pliers. It is important to compress only the tip of the guide part - that is, about 10 millimetres, plus, in no case, pinch it so that the brush can continue to move along the guide. In words, it sounds simple, but it may not work the first time, and it will damage the brush. You can still try to do it yourself and acquire a useful skill to restore brushes for any devices with collector motors in the future, or you can contact a service center and save time.

We change the brushes with our own hands.

We figured out why the whistle appeared in the washing machine. It remains only to describe the replacement process if you change these parts with your hands. If everything is done correctly, then there will be no extraneous noise after replacing the brushes, which is why it is so important to approach the repair with all responsibility. But first, you need to prepare a set of tools, which includes the following:

• Regular and Phillips screwdrivers,
• Black marker or ordinary pencil,
• 8mm TORX wrench.

Having prepared a small set of tools, you can proceed to the repair. But, again, carefully follow each step of the instructions to avoid damaging anything.

• Disconnect the home assistant from all communications, remembering to close the stopcock first.
• Remove the inlet hose from which water may come out, so prepare a container for the liquid.
• Remove the dust filter mounted on the front wall of the housing at the bottom right, hidden by a decorative panel.
• While there is such an opportunity, carefully clean the hole formed after dismantling the filter from dirt and debris.
• For your convenience, move the washing machine away from the wall so that you can access all sides of the machine.
• To get to the motor, unscrew the screws that secure the top cover of the CM and the bolts that hold the back of the case.
• Under the tank of the device, you will find a motor from which you need to drop the drive belt, for which you need to pull the elastic band towards you and then carefully turn the drum pulley.
• Disconnect the wires with contacts that are connected to the machine's engine.
• Using a TORX wrench, remove the bolts that hold the motor.
• Grab the element and gently rock it until you pull it out of the housing. Be prepared for the fact that the detail is weighty.
• Finally, you can examine the brushes mounted on the sides of the motor and replace them if necessary.
• If a replacement is needed, then to dismantle the brush, you need to disconnect the wire, move the contact down and stretch the spring to remove the part.
• To install a new brush, you must first install the tip in the socket, compress the spring, place the part there, close the brush with a contact, and connect the cable.

After installing the new brushes, it remains only to install the electric motor in its place and fully assemble the device. As you can see, this procedure has nothing complicated but simple if you follow the instructions clearly to cope with it even without proper experience.