Where is the tachometer in the washing machine?

How to Replace a Tachometer in a Washing Machine

First we need to remove the tachometer from the washing machine. To do this, you must first disconnect the connectors tahodatcher, if you have not already done so. The connectors can both simply pull out and be secured in a common socket, from which they need to be carefully pulled out. From a thin slotted screwdriver. Next you need to remove the tachogenerator cover, it usually snaps. The covers can be made of metal or plastic. Also, the cover can go together with the tachogenerator and is secured with bolts. Unscrew the bolts that fasten the tachometer and remove it.

Assembling is done in the reverse order. In the video below you can see how to remove the motor from the washing machine.

Washing machine motor tachometer coil

Replacing the Pressostat

If checking the water level switch showed that it is faulty, its replacement in most cases does not cause much difficulty. Therefore, this device can be replaced with your own hands, without resorting to the help of specialists. The repair of the device itself is not only impractical, but also useless, as the housing is made undismountable, any attempt to get to the internal parts will lead to a violation of its integrity. Some types of water pressure sensors are subject to opening, but this is quite a long process and requires some expertise in this area.

Replacement of the pressostat in the washing machine begins with disconnecting the vacuum tube and electrical contacts. Having loosened or having unscrewed fixing bolts the sensor should be removed. Installing the device in place is carried out in the reverse sequence to the dismantling. Although, the vast majority of sensors are similar in appearance, it is necessary to take into account that this element is configured for a particular model and brand of washing machine.

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Safety precautions must be strictly observed when carrying out all types of work. Getting down to work in the mandatory manner it is necessary to disconnect the plug of the washing machine from the power outlet.

How to know if the tachometer is broken

To detect the malfunction of the washing machine is quite easy, because most of its functions are disturbed. But the breakdown of the tachogenerator can be distinguished from others by a number of the following signs:

  • Sudden abrupt changes in the speed of the rotating shaft,
  • Too high rotation speed when washing, which is several times higher than normal,
  • Very low or no drum speed during spinning (drum does not rotate),
  • After the end of the washing machine clothes remain badly squeezed or completely wet.

Advice from the experts

To avoid repairing the tachogenerator of the washing machine it is recommended to install a reliable element called a Hall sensor. It is mounted on the motor of the device and is characterized by high performance. Many leading brands initially equip new generation washing machines with this device.

Not always the slow work of the loading drum indicates the breakage of the tachogenerator of the washing machine atlant. Before replacing this part, you should check the functionality of the buttons. Banal falling down of the spin button can lead to a decrease in drum speed during the washing and spinning stage.


In addition to malfunctions of the tachogenerator, overloading of the drum can lead to slow rotations. Often hostesses do not comply with the manufacturer’s recommended parameters for washing machine use. If you load more laundry into the drum than the design features of the machine provide for, it will lead to incorrect operation of the equipment at all stages.

Where is it located??

As we have already said, the tachometer is an element of the washing machine motor, which is located on the rotating shaft. It is quite easy to find it, but to do this you will have to partially disassemble the washing machine. The motor is located at the bottom of the appliance, to get to it, you need to move the unit away from the wall and remove the back panel (unscrew the fasteners and pick up the cover with a thin screwdriver). To find the motor is not difficult: it is a device that is connected to the pulley (rotating wheel) through a drive belt. On the shaft of the electric motor you will see a metal ring. this is the tachogenerator.

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Two-level ceilings of plasterboard with their own hands. instructions for the device and installation

What is a tachogenerator?

It is an element that looks like a small coil. On its operation depends the entire control circuit of the washing machine. This position makes the sensor a very important element.

Why do you need it in a washing machine??

The device is responsible for determining and amplifying the speed of rotation of the motor. It also has a second name: Hall sensor. after the name of the inventor. Any expert will tell you what this element is for. it ensures that the clothes are spinning properly and are dry. If it remains wet after washing, it means that the problem is in the sensor or a failure of its code.

Operating Principle

The tachogenerator of the washing machine is arranged as follows: it is a solid metal ring with two wires connected to it. The element is connected to the shaft of the electric motor, supplying voltage. The principle of operation is ensured by the rotation of the motor. Inside the coil, a voltage is magnetically generated that changes as the speed of the electric motor rpm is picked up or slowed down. The sensor is needed to measure the voltage. It also continuously sends status messages to the main control module. There they are processed and used to keep the appliance running smoothly.

Where is it located?

In any brand of machines (Candy, Indesit, Samsung) you can immediately find the place where the tachometer is. You can see it by opening the back cover. The tachogenerator is located on the motor shaft.

Washing machine tachometer: description, photo, video and table

The washing machine tachometer is a small electromagnetic device mounted on the shaft of the belt-driven motor or directly on the direct-driven motor. It is also called a tachogenerator or a hall sensor. Depending on the model of the washing machine, such devices may have some design differences. They are all designed. to regulate the speed of the motor shaft in the washing machine.

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How the sensor works?

It is important to understand what role the tachogenerator plays in the washing machine system. The sensor is made in the form of a ring, which has wires. When an electric motor is running, voltage appears in the tachometer, due to the magnetic field. The nominal value of the generated voltage is directly related to the speed of rotation of the motor. the faster the motor rotates, the stronger the voltage generated in the ring.

The tacho generator makes it possible to accurately determine the speed of the washing machine motor.

It is for controlling the speed of the motor and Hall sensor is designed. The principle of operation of the element is as follows. For example, the motor starts rotating more rapidly to provide the spinning speed set by the user. So, the motor needs to speed up to 800 revolutions per minute. The control unit immediately sends a signal to the motor to pick up speed, but at what point does it stop picking up speed? It is the tachogenerator, which measures the engine speed, that will signal the control unit to stop speeding up the washing machine’s motor when the operating parameters are reached.


Many people do not think about all the complexity of the mechanisms inside the washing machine. But it happens that the machine breaks down, and often the cause of the breakdown may be such an inconspicuous detail such as the tachometer or tachogenerator of the washing machine.

tachometer, washing, machine

Signs of tachometer malfunction

That the tachogenerator is defective and needs to be repaired or replaced, you can tell by a number of signs:

  • sudden changes in the drum rotation speed occur;
  • When spinning, the drum spins much slower than it should;
  • the drum speed is significantly higher than usual during the washing process;
  • At the end of the washing, you pull out of the drum poorly wrung out or completely wet laundry.
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