Samsung Dishwasher Won't Fill: Troubleshooting Guide
Quick answer
If your Samsung dishwasher won't fill, first check the water supply valve and filter. Ensure the float switch is not stuck and the inlet valve is working. If these don't resolve the issue, the control board may need inspection.
Confirm the symptom
- Dishwasher does not fill with water during cycle
- No water entering the dishwasher
- Dishwasher starts but immediately drains
Tools and prep
- Screwdriver — To remove panels and access components
- Multimeter — To test electrical components
- Adjustable Wrench — To access water supply valve
- Flashlight — To illuminate internal components
- Plastic Spatula — To gently clean filters
Disclosure: We may earn a commission from qualifying purchases via affiliate links. Learn more.
Prep & safety
- Turn off the dishwasher and unplug it from the power source for safety.
- Ensure the water supply is turned off before accessing internal components.
Step-by-step troubleshooting
Check Water Supply Valve
Do: Locate the water supply valve under the sink and ensure it is fully open.
Observe: Water should flow freely when the valve is open.
Means: If the valve is closed or partially closed, opening it may resolve the issue.
Next: If water still doesn't fill, proceed to the next step.
Inspect Water Inlet Filter
Do: Locate the inlet filter (usually at the water inlet valve) and clean it with a plastic spatula.
Observe: The filter should be free of debris and sediment.
Means: A clogged filter can prevent water from entering the dishwasher.
Next: If the filter is clean and the issue persists, move to the next step.
Test Float Switch
Do: Open the dishwasher and lift the float switch manually to see if it moves freely.
Observe: The float should rise and fall without obstruction.
Means: A stuck float can prevent the dishwasher from filling.
Next: If the float moves freely, continue to the next step.
Check Inlet Valve
Do: Use a multimeter to test the inlet valve for continuity.
Observe: The multimeter should show continuity if the valve is working.
Means: No continuity indicates a faulty inlet valve that may need replacement.
Next: If the valve is faulty, consider replacing it. If not, proceed further.
Inspect Control Board
Do: Check the control board for any visible damage or error codes.
Observe: Look for burn marks or error messages on the display.
Means: A malfunctioning control board may prevent the dishwasher from filling.
Next: If the control board shows signs of damage, consult a professional.
Verify Water Supply Line
Do: Check the water supply line for kinks or blockages.
Observe: The supply line should be straight and free of obstructions.
Means: A kinked or blocked line can restrict water flow.
Next: If the line is clear, the issue may be more complex.
Common causes table
| Cause | Why | Likelihood | Difficulty | Part often needed |
|---|---|---|---|---|
| Closed Water Supply Valve | The valve is not allowing water to enter the dishwasher. | High | Easy | No |
| Clogged Inlet Filter | Debris in the filter can block water flow. | High | Easy | No |
| Stuck Float Switch | A stuck float can prevent the dishwasher from filling. | Medium | Easy | No |
| Faulty Inlet Valve | The valve may be defective and not allowing water to flow. | Medium | Moderate | Yes |
| Malfunctioning Control Board | The control board may not be sending the correct signals. | Low | Hard | Yes |
| Kinked Water Supply Line | A kink can restrict water flow to the dishwasher. | Medium | Easy | No |
Parts matching
If replacement parts are needed, ensure they match your dishwasher model.
- Water Inlet Valve: match model number and voltage
- Control Board: match exact model and firmware version
- Float Switch: match size and compatibility with your model
Consult your dishwasher's manual for specific part numbers and compatibility.
Disclosure: We may earn a commission from qualifying purchases via affiliate links. Learn more.
When to call a pro
- If the inlet valve shows no continuity and you're unsure how to replace it
- If the control board is damaged or displaying error codes
- If the dishwasher still won't fill after checking all components
- If you're not comfortable working with electrical components
FAQ
Why is my Samsung dishwasher not filling with water?
Common causes include a closed water supply valve, clogged inlet filter, or a faulty inlet valve.
How do I clean the inlet filter on my Samsung dishwasher?
Locate the inlet filter at the water inlet valve and use a plastic spatula to remove debris.
Can a stuck float switch prevent the dishwasher from filling?
Yes, a stuck float switch can stop the dishwasher from filling. Ensure it moves freely.
What should I do if the inlet valve is faulty?
Replace the inlet valve with a model-specific part. If unsure, consult a professional.