Water Sensor in Automatic Washing Machines
The water level sensor in automatic washing machines, commonly referred to as the pressure switch, water level switch, or simply the water gauge, plays a critical role in regulating the amount of water that enters the machine. Its primary function is to determine the appropriate water level required for washing, which is predetermined by the specific washing program selected; each program demands a designated amount of water. There are two main types of water sensors: standard and electronic. Typically, the water sensor is located at the top of the machine and is connected via a thin hose to a bulging component linked to a hollow cylinder situated in the lower part of the machine tub. While modern washing machines differ in design from older models, their fundamental components remain consistent. When a malfunction occurs with the water sensor, an error signal is displayed, and troubleshooting the issue is generally more straightforward in newer machines.
Common Faults of Water Sensors in Washing Machines
There are several common issues associated with the water sensor in washing machines:
- Inability to draw water: This problem arises when there is no electrical connection between the sensor terminals and the connected hoses, preventing power from reaching the water valve, which in turn halts water intake.
- Excess water filling the drum: If there is a blockage in the hose connecting the water sensor to the hollow cylinder, the air pressure sent to the sensor will be interrupted. Consequently, the water intake continues despite the drum reaching its necessary capacity.
- Overflowing water in the tub: This can occur due to air leaks within the sensor, potentially caused by a broken hose, improper sealing where the hose connects to the sensor, or even a defect within the sensor itself.
- Heater activation without water: This situation is usually due to a failure in the sensor’s connection board, which allows electricity to reach the heater prior to the tub filling with water. This poses a significant safety risk if not promptly addressed. In modern washing machines, an error code will usually alert the user when this issue arises.
How to Inspect the Hose
If you suspect an issue with the water sensor, the first step may involve inspecting the connected hose to ensure all components of the washing machine are functioning correctly. The inspection process can be followed through these steps:
- Examine the hose connecting the water sensor to the washing drum.
- Verify that all hoses and connections between the water sensor and the other components are secure.
- Disconnect the hose.
- Check for any blockages or leaks in the hose.
- Repair the hose if it is bent or broken; replace it if there are any defects or holes.
- Clean the hose of any accumulated debris or sticky substances, as these residues can be the root cause of the entire issue and can be resolved simply by cleaning the hose.