A frequent problem on the washing machine is related to the filling of water in the device. In fact, it may happen that the device fills or empties on its own, or constantly. This problem can be caused by the failure of several parts participating in the water circuit in the washing machine. To resolve this fault, the following actions must then be taken:
- Check the water inlet hose
- Clean the filters
- Test the solenoid valve
- Check the hoses
- Clean the product box
- Test the pressure switch
If none of the steps mentioned resolves the fault, the electronic board will have to be replaced.
Discovering that your washing machine is filling or draining by itself can be a puzzling and concerning situation. A washing machine is designed to operate according to specific cycles and commands, so any unexpected actions like filling or draining without user input can indicate an underlying problem. There are several potential reasons why a washing machine may fill or drain by itself, ranging from simple issues to more complex electrical or mechanical malfunctions. Understanding these causes can help you troubleshoot the problem and find a solution. In this article, we will explore the common reasons why a washing machine may exhibit this behavior and provide possible solutions to address the issue.
1. Faulty Water Inlet Valve
A faulty water inlet valve can cause the washing machine to fill with water spontaneously. The inlet valve controls the water flow into the machine during the wash and rinse cycles. If the valve is stuck open or experiences a malfunction, it may allow water to enter the machine even when it’s not in a designated cycle. Inspect the water inlet valve and ensure it is functioning properly. If necessary, replace the faulty water inlet valve to resolve the issue.
2. Defective Water Level Sensor
The water level sensor, also known as the pressure switch, monitors the water level inside the washing machine. It signals the machine to stop filling with water once the desired level is reached. If the water level sensor is faulty or misaligned, it may not detect the water level accurately, causing the machine to overfill or intermittently fill. Test the water level sensor for continuity and proper operation. If it is defective, consider replacing it to restore normal functioning.
3. Clogged or Defective Drain Pump
A clogged or defective drain pump can cause the washing machine to drain water spontaneously. The drain pump is responsible for removing water from the machine after each cycle. If the pump is clogged or malfunctioning, it may trigger the drainage process unexpectedly or fail to stop draining when it should. Inspect the drain pump for any blockages or debris. Clean the pump or replace it if it is defective to ensure proper drainage.
4. Electrical Control Board Malfunctions
Electrical control board malfunctions can disrupt the normal operation of the washing machine. If the control board experiences a fault or damage, it may send incorrect signals to the different components, leading to unintended actions like filling or draining. Inspect the control board for any signs of damage or burnt components. If required, contact a professional technician to diagnose and repair or replace the faulty control board.
5. Wiring or Sensor Issues
Wiring or sensor problems within the washing machine can also result in unexpected filling or draining actions. Loose connections, damaged wires, or faulty sensors can cause incorrect signals to be sent, leading to unintended water flow. Inspect the wiring and sensors for any visible issues. Repair or replace any damaged components as needed.
TEST THE WASHING MACHINE PRESSURE SWITCH
The pressure switch controls the water level in the washing machine using an air pressure system. If it is defective, an error code will be displayed and the solenoid valve will not be powered. This part is located on the top of the washing machine for front loading and on the front panel for a “top” washing machine.
Check if you have a ball pressure switch, because the analog ones are not controllable: they are provided with an electronic board.
- Disconnect the pressure switch from the hose.
- Set your multimeter to the continuity position and put the two test probes on the terminals of the pressure switch. If the multimeter beeps, the pressure switch is working.
- If your pressure switch is not analog, you can also check it by blowing inside, while holding the multimeter tips on the terminals: this will activate the membranes, make contact and cause a change of state. If you hear a beep, or if you notice a change in status on the multimeter while you blow into the pressure switch, then it is not the cause of the fault.
TEST THE POWER TO THE SOLENOID VALVE
It is possible that the solenoid valve is mechanically blocked. To check this, we will power it up and take a measurement using the multimeter. The test is carried out under voltage, with the device plugged in: wear insulating gloves or do not touch any metal part with your fingers.
- Locate the solenoid valve and unplug it.
- Plug your washing machine back in and run a normal program.
- Set your multimeter to the AC Volt position and make sure you are on a scale above 230V.
- Position the probes of the multimeter on the connectors of the solenoid valve. The multimeter should show a value around 230-240 volts.
- Replace the solenoid valve if the multimeter finds no value or a value that is too low.
Troubleshooting Steps
Here are some troubleshooting steps you can take when your washing machine is filling or draining by itself:
- Inspect the water inlet valve for any malfunction and replace it if necessary.
- Test the water level sensor for continuity and proper operation. Replace it if it is faulty.
- Check the drain pump for blockages and clean or replace it if needed.
- Inspect the electrical control board for any damage or faults. Contact a professional technician for repair or replacement.
- Inspect the wiring and sensors for any visible issues. Repair or replace any damaged components as needed.
By following these steps, you can often identify and address the issue of a washing machine that fills or drains by itself. Regular maintenance, proper usage, and attention to the machine’s components will help prevent future occurrences.
In conclusion, a washing machine that fills or drains by itself can be caused by various factors, including a faulty water inlet valve, a defective water level sensor, a clogged or defective drain pump, electrical control board malfunctions, or wiring and sensor issues. By understanding these common causes and following the troubleshooting steps mentioned above, you can often identify and address the issue effectively. If the problem persists or if you are unsure about any repairs, it is advisable to consult a professional technician to diagnose and repair the specific problem with your washing machine.
