My Maytag Dishwasher Won't Fill with Water: Troubleshooting Guide
Quick answer
Check the water supply valve is fully open and the dishwasher is connected to the water line. Inspect the float switch for proper positioning and the inlet valve for clogs or damage. Replace the inlet valve if necessary.
Confirm the symptom
- Dishwasher does not start filling with water
- No water enters the dishwasher during cycle
- Dishwasher completes cycle without filling
- Water supply line is connected but no water flows in
- Dishwasher makes noise but no water enters
Tools and prep
- Adjustable wrench — To disconnect and reconnect water supply line
- Screwdriver set — To access and remove panels
- Multimeter — To test electrical components
- Flashlight — To inspect hard-to-see areas
- Plastic container — To catch water during testing
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Prep & safety
- Ensure the dishwasher is unplugged from the power source for safety.
- Turn off the water supply valve to the dishwasher before starting any inspection or repair.
Step-by-step troubleshooting
Check Water Supply Valve
Do: Locate the water supply valve under the sink or near the dishwasher and ensure it is fully open.
Observe: Water should flow freely from the supply line when the valve is open.
Means: If the valve is closed or partially closed, this is the issue.
Next: Open the valve fully and restart the dishwasher.
Inspect Water Supply Line
Do: Check the water supply line for kinks, cracks, or blockages.
Observe: Any visible damage or blockage in the line.
Means: A damaged or blocked supply line will prevent water from entering the dishwasher.
Next: Replace the supply line if damaged or clear any blockages.
Test Float Switch
Do: Open the dishwasher and locate the float switch in the bottom of the tub. Ensure it is not stuck in the raised position.
Observe: The float should move freely up and down.
Means: If the float is stuck, the dishwasher will not fill with water.
Next: Adjust or clean the float switch if necessary.
Check Inlet Valve
Do: Inspect the inlet valve for debris or mineral buildup. Use a flashlight to look for visible clogs.
Observe: Debris or buildup inside the valve.
Means: A clogged inlet valve can prevent water from entering the dishwasher.
Next: Clean the valve or replace it if damaged.
Test Inlet Valve with Multimeter
Do: Set the multimeter to the ohms setting and test the inlet valve for continuity.
Observe: The multimeter should show a reading between 2,000 and 5,000 ohms.
Means: No reading indicates a faulty inlet valve.
Next: Replace the inlet valve if it shows no continuity.
Verify Water Pressure
Do: Check the water pressure in your home using a pressure gauge.
Observe: Water pressure should be between 20 and 120 psi.
Means: Low water pressure can prevent the dishwasher from filling properly.
Next: Adjust or fix the water pressure if it is too low.
Inspect Dishwasher Connections
Do: Check the connections between the water supply line and the dishwasher for leaks or loose fittings.
Observe: Any leaks or loose connections.
Means: Leaky or loose connections can cause water to not flow into the dishwasher.
Next: Tighten or replace any faulty connections.
Run Diagnostic Test
Do: Consult the dishwasher's manual to run a diagnostic test to identify any error codes.
Observe: The dishwasher may display an error code related to water filling issues.
Means: Error codes can help pinpoint the exact issue.
Next: Refer to the manual for troubleshooting the specific error code.
Common causes table
| Cause | Why | Likelihood | Difficulty | Part often needed |
|---|---|---|---|---|
| Closed or partially closed water supply valve | The valve restricts water flow to the dishwasher. | High | Low | No |
| Clogged or damaged water supply line | Blockages or damage prevent water from reaching the dishwasher. | Medium | Medium | Yes |
| Stuck or faulty float switch | The float switch prevents the dishwasher from filling if stuck. | Medium | Low | Yes |
| Clogged or faulty inlet valve | The inlet valve allows water into the dishwasher and can become clogged or fail. | High | Medium | Yes |
| Low water pressure | Insufficient water pressure prevents proper filling. | Low | Low | No |
| Loose or leaking connections | Leaks or loose connections can cause water to not flow properly. | Medium | Low | No |
| Faulty dishwasher control board | The control board may not be sending the correct signals to the inlet valve. | Low | High | Yes |
| Error codes indicating water fill issues | The dishwasher's diagnostic system can identify specific issues. | Low | Low | No |
Parts matching
When replacing parts for your Maytag dishwasher, ensure the new components match the following specifications:
- Inlet Valve: model number and electrical rating (volts/amps)
- Float Switch: model number and compatibility with your dishwasher model
- Water Supply Line: length and connection type (quick-connect or threaded)
- Control Board: model number and compatibility with your dishwasher
Refer to your dishwasher's manual for the exact model numbers and specifications of the parts.
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When to call a pro
- If the dishwasher still won't fill after replacing the inlet valve and checking all connections.
- If you suspect a faulty control board and are not comfortable with electrical repairs.
- If the water supply line is damaged beyond simple replacement.
- If you encounter persistent error codes that cannot be resolved with basic troubleshooting.
- If you are unsure about any step in the troubleshooting process.
FAQ
How do I know if the inlet valve is faulty?
If the dishwasher does not fill with water and the inlet valve shows no continuity when tested with a multimeter, it is likely faulty and needs replacement.
Can low water pressure affect the dishwasher's performance?
Yes, low water pressure can prevent the dishwasher from filling properly. Check your home's water pressure and ensure it is between 20 and 120 psi.
What should I do if the float switch is stuck?
Gently move the float switch up and down to ensure it moves freely. If it is damaged, replace it with a compatible part.
How often should I check the water supply line for issues?
It is a good idea to inspect the water supply line annually for any signs of wear, cracks, or blockages.
Can I replace the inlet valve myself?
Yes, replacing the inlet valve is a common DIY repair. Ensure you turn off the water supply and unplug the dishwasher before starting.