This issue can waste water, reduce washing performance, and prevent the machine from completing cycles.
1. Drain Hose Positioned Too Low (Most Common Cause)
Why it happens
If the drain hose is placed too low or inserted too far into the drain pipe, water will immediately flow out due to gravity.
Symptoms
- Water enters but immediately exits
- Drum never fills properly
- Continuous water flow sound
Solution
- Ensure drain hose is installed at correct height (usually 60–90 cm from floor)
- Do not push hose deep into drain pipe
- Secure hose properly to prevent slipping
???? This is the most common and easiest fix.
2. Siphoning Effect (Improper Drain Setup)
Why it happens
If the drain hose creates a vacuum or siphon effect, water gets pulled out continuously while filling.
Symptoms
- Constant draining sound
- Low water level in drum
- Cycle never progresses
Solution
- Install anti-siphon loop or air gap
- Ensure proper hose curvature
- Follow Samsung installation guidelines
3. Faulty or Stuck Drain Pump
Why it happens
If the drain pump is stuck in ON position or electrically faulty, it may keep pumping water out even while filling.
Symptoms
- Continuous draining noise
- No proper water level
- Possible error codes
Solution
- Turn off machine immediately
- Inspect drain pump for blockage
- Replace drain pump if faulty
- Check wiring to pump
4. Water Inlet Valve and Drain Timing Issue (Control Board Fault)
Why it happens
The control board may send incorrect signals, causing inlet and drain functions to run simultaneously.
Symptoms
- Random filling and draining
- Cycle not progressing
- Error codes on display
Solution
- Restart machine
- Check for firmware issues
- Replace control board if needed
5. Clogged or Partially Blocked Drain Hose
Why it happens
A blockage can create pressure imbalance, causing water to flow unpredictably.
Symptoms
- Slow filling
- Water backup
- Irregular draining
Solution
- Remove drain hose
- Clean inside thoroughly
- Remove lint, dirt, or foreign objects
6. Water Level Sensor (Pressure Switch) Problem
Why it happens
If the sensor cannot detect water level correctly, it may keep allowing water in while also triggering drain action.
Symptoms
- Overfilling or no proper fill
- Machine confusion during cycle
- Continuous water movement
Solution
- Check pressure hose for blockage
- Clean or replace sensor
- Inspect connection tubing
7. Incorrect Installation Height of Drain Pipe
Why it happens
If the home drain pipe is too low, water cannot stay in the drum.
Symptoms
- Immediate water loss
- Weak wash performance
Solution
- Raise drain pipe height
- Follow installation manual (typically 60–90 cm height requirement)
8. Air Leak in Drain System
Why it happens
Cracks or loose connections in the hose allow air entry, breaking proper water balance.
Symptoms
- Gurgling sound
- Irregular water level
- Weak filling
Solution
- Tighten hose connections
- Replace damaged hose
- Seal joints properly
9. Faulty Water Inlet Valve (Less Common)
Why it happens
If inlet valve leaks internally, water may flow uncontrollably while drain system keeps running.
Symptoms
- Continuous water movement
- Machine cannot hold water
Solution
- Replace inlet valve
- Check valve solenoid operation
Step-by-Step Troubleshooting Guide
If your Samsung washing machine is filling and draining at the same time:
- Turn off machine immediately
- Check drain hose height
- Ensure hose is not too deep in drain pipe
- Inspect siphon effect
- Clean drain hose
- Check drain pump operation
- Restart machine
- Observe water level behavior
- Inspect pressure sensor
- Call technician if issue continues
How to Prevent This Problem in Future
- Install drain hose at correct height
- Avoid improper hose insertion
- Clean drain filter regularly
- Ensure proper installation during setup
- Check plumbing periodically
- Avoid DIY modifications to drain system
Proper installation is the key to preventing this issue.
When to Call a Technician
Contact Samsung support if:
- Drain pump runs continuously
- Water never stays in drum
- Control board errors appear
- Pressure sensor failure suspected
- Problem continues after checking hose setup
Official Samsung support:
Samsung Support
Conclusion
A Samsung washing machine filling and draining at the same time is usually caused by incorrect drain hose placement, siphoning effect, faulty drain pump, or sensor/control system issues. In most cases, improper installation is the main reason and can be fixed easily.
However, if internal components like the pump, sensor, or control board are faulty, professional repair is required. With correct installation and regular maintenance, this problem can be completely prevented and your washing machine will work normally again.