**Sanyo Washing Machine: Troubleshooting Water Ingress After Wash Starts**
When the wash cycle begins, it indicates that the water level has reached the point controlled by the water level switch. At this time, the common terminal of the water level switch should be connected to the normally open (NO) terminal, while simultaneously disconnecting from the normally closed (NC) terminal to stop the water inflow.
The issue of continuous water ingress typically occurs in the water inlet valve or its control circuit. If the water continues to flow even after disconnecting the power supply of the washing machine, or if you close the water tap and feel no vibration at the water inlet valve port when touched by hand, it can be concluded that the fault lies within the water inlet valve itself. On the other hand, if the water stops immediately after disconnecting the power supply, or if you close the water tap and feel vibrations and a slight humming sound at the water inlet valve port, it means the water inlet valve is still powered, indicating a fault in the control circuit of the water inlet valve. In electric fully automatic washing machines, the only difference between the water inlet circuit and the wash circuit lies in the internal circuitry of the water level switch. If the common terminal and the NC terminal of the water level switch are stuck together, all three terminals (common, NC, and NO) will be interconnected during contact transition, causing both the water inlet circuit and the wash circuit to be activated simultaneously.
During maintenance, a multimeter can be used to check the continuity of the three terminals of the water level switch. If all three terminals are interconnected, the water level switch should be replaced (most water level switches cannot be disassembled). For computer-controlled fully automatic washing machines, the water level switch only contains the common terminal and the NO terminal. When these two terminals are connected, a signal is sent to the microprocessor, which then controls the program transition. However, if there is a fault in the water inlet valve circuit, after the water level switch is activated, the connection and disconnection of the water inlet valve circuit will no longer be controlled by the microprocessor, resulting in the water inlet valve circuit remaining connected and the washing machine continuing to fill with water. In such cases, the water inlet valve control circuit needs to be inspected and repaired.
Content sourced from: [http://blog.sina.com.cn/sanyangxiyji](http://blog.sina.com.cn/sanyangxiyji)