It's certainly alarming to see your Samsung washer continue to fill with water, and it is a problem you should address quickly to prevent potential water damage to your home. While the official guidance from Samsung strongly recommends turning off the water valves and contacting a service technician immediately for a continuous fill issue, there are a few primary causes you can safely check before making that call.
### ???? First, Safety First
Before doing anything else, **turn off the water supply valves** behind the machine to stop the flow of water into the unit. If you cannot locate the valves, you can also unplug the washer to cut all power.
### ???? The Most Likely Culprits
A washing machine that won't stop filling is almost always suffering from one of two problems: a faulty **water level (pressure) switch** or a **stuck water inlet valve**.
**1. A Faulty Water Level (Pressure) Switch**
This is the most common cause. Your Samsung washer uses a pressure switch, which is a small, air-filled sensor connected by a clear rubber tube to the bottom of the outer tub. As water enters the tub, air is pushed up the tube, increasing pressure on the switch. When the correct water level is reached, the switch sends a signal to the main computer (the control board) to cut power to the water inlet valves, stopping the flow.
If the pressure switch is defective, its internal mechanism fails, or the rubber tube is clogged, kinked, or has come loose, the switch won't send the "stop filling" signal. The washer’s computer still thinks the tub is empty, so it continues to open the water valves, leading to an overflow.
**2. A Stuck Water Inlet Valve**
The inlet valve is the component that physically opens and closes to let water from your home's hoses into the machine. It is controlled by electronic solenoids that open and close the valve's internal diaphragm.
These valves can fail in a few ways:
- **Electrical Failure:** A short circuit can cause the solenoid to stay permanently "open."
- **Mechanical Failure:** The rubber diaphragm inside can become brittle, warped, or blocked by debris (like sand or rust from your pipes), preventing it from sealing shut even when the power is off. A tiny grain of sand is all it takes to keep the valve from closing completely.
**3. Siphoning (A Drainage Issue)**
In some cases, the washer might not be "filling" continuously, but rather filling and then immediately siphoning the water out. This creates the illusion of a never-ending fill cycle. This happens if the drain hose is pushed too far (more than 8 inches/20 cm) down the standpipe. The water creates a siphon, pulling water out of the machine as fast as it comes in, so the tub never reaches the correct level. While less common, checking the drain hose installation is a quick and easy diagnostic step.
### ????️ Step-by-Step Troubleshooting Guide
Follow these steps to diagnose the issue. Remember to **keep the washer unplugged** for any steps that involve touching internal parts or hoses.
| Step | Action | What to Look For & Solution |
| :--- | :--- | :--- |
| **1** | **Inspect the Drain Hose** | Pull the machine out. Ensure the drain hose is inserted into the standpipe no more than **6-8 inches** (15-20 cm). If it's deeper, adjust it immediately and test the machine. |
| **2** | **Check and Clean the Pressure Switch System** | Remove the top panel of the washer. Locate the pressure switch (a small round part, often with a wiring harness) and follow its clear rubber tube down to the tub. Disconnect the tube from both ends, blow through it, and rinse it out if blocked. Reconnect it securely to both the tub and the switch. |
| **3** | **Examine the Water Inlet Valves & Screens** | Turn off the water and disconnect the fill hoses from the *back of the washer*. Inside the valve openings, you'll see small mesh screens. Carefully remove any debris. You can also use a multimeter to test the valve's electrical resistance; an open (infinite) reading or a short (zero) reading usually means it's broken. |
| **4** | **Perform a Control Panel Reset** | Reconnect the power. Without starting a cycle, press and hold the **Start/Pause** button for 5-10 seconds. Unplug the unit for one minute, then plug it back in to reset the main computer. |
| **5** | **Look for Error Codes** | Turn the machine on. If the computer detects a problem with the pressure switch, it may display a **1E** error code. An **OE** or **OF** code indicates the machine has detected an overflow situation. |
### ???? Final Recommendations and When to Call a Pro
If you have completed all the above checks—you have inspected the drain hose, cleared the pressure switch tube, cleaned the inlet valve screens, and performed a reset—but the machine still fills continuously, the component has almost certainly failed internally.
Replacing a water inlet valve or a pressure switch is a moderate-level DIY job if you are handy with tools and comfortable following video tutorials for your specific model. However, due to the high risk of serious water damage to your floors and home, if you are not 100% confident, it is best to **call for professional service**. As noted in Samsung's official documentation, a continuous fill scenario is a primary reason to turn off the water and schedule a repair.