How to replace the pressure switch( relay, level sensor) in the washing machine

If there is a problem with the washing machine, too much water is poured into the tank - the reason for the breakage of the pressure switch. This device monitors the water level in the tank, and if it fails, the control module does not receive a signal about the volume collected.

Is repair needed in this case? You will need to replace the level sensor, which you can make yourself.

Material content:

  • 1 Appearance and operation of the sensor
  • 2 Symptoms
  • 3 How to check and replace the level sensor

Appearance and operation of the sensor

The pressure switch is a small round element that is located at the side of the machine. To get to it is easy, just remove the top panel: the device is located at the very top.

A tube coming from the pressure take-off chamber is attached to the pressostat; in addition, wires are connected to it. The sensor contains a membrane inside which is curved when pressure occurs. As a result, the contacts are closed, sending a signal to the main module.

Next, the module sends a signal to the inlet valves to complete the water intake. They close, the washing process begins. Look at the operation and connection of the pressure switch:

. Symptoms

How to determine if the level sensor needs replacing? This can be done by the following features:

  1. The washing machine has displayed an error code on the display indicating a breakdown.
  2. You notice that water is typed incorrectly. Its volume does not reach the minimum level in the tank or exceeds the maximum mark.
  3. Continuously draws water.
  4. Rinse mode does not start.
  5. The heater starts up when the tank is empty. A faulty relay sends a signal to the module to draw water, but in fact it is not in the tank.
  6. Water is not completely drained. After the spin, you take out badly wrung things.

How to check and replace the level sensor

So you have noticed similar faults and suspected that the relay is faulty. How to check it at home:

  • Disconnect power from the washer, turn off the water supply.
  • Next, you need to remove the top cover, behind which there is a level sensor.

  • Use a Phillips head( allen) screwdriver and remove the two screws from the back.
  • Slightly moving the cover forward, lift it up and put it aside.
  • Take a picture of the location of the pressostat contacts.

  • Disconnect the wires from it, pick up the phone.
  • Unscrew the screws that secure the sensor.

After you have removed the pressostat from the AGR body, proceed to its inspection. If outwardly no signs of breakage are found, do this:

  • Take a small hose, the size of a connector, into which the sensor tube is inserted.
  • Install it in place of the hole for the tube.

  • Pick up the phone.
  • If you hear clicks( there may be from two to three, depending on the type of sensor), then the device is operational.
  • If there are no clicks, a replacement will be needed.

If you blew into the tube and heard clicks, check the pressostat hose for clogs. Rinse with tap water.

Before replacing the pressure switch on the washer, perform an additional check.

  • Take a multimeter. Set the tester to the measurement mode - ohmmeter.
  • Connect the test leads to the sensor terminals.

  • Pick up and follow the tester.

  • Multimeter will capture the closing and opening of contacts. This will speak about the health of the device.

If you were convinced of the breakdown of the pressure switch, you need to select a new relay for the washing machine. You can go to the store with the old sensor, or just call the brand and model of your CM to the seller, he will give you the desired detail.

To replace the pressure switch in the washing machine, take a new device, connect a pressure hose to it. Then connect the wires to the pins. Secure the sensor with screws in the same place.

Great! Work is done. For self-repair we suggest watching the video about replacing the relay:

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