Completely dry tub
You start a cycle, hear normal startup sounds or a faint hum, but no water ever splashes into the tub.
Start here: Begin with the sink-side shutoff valve, supply line, and whether the dishwasher float is stuck in the up position.
Dishwasher fill problem
Dishwasher Not Filling
Direct answer: If your dishwasher starts but no water comes in, the most common causes are a closed or restricted water supply, a stuck dishwasher float, or a dishwasher water inlet valve that is not opening.
Most likely: Start by confirming the sink-side water shutoff is fully open, the supply line is not kinked, and the float inside the tub moves freely up and down.
A dishwasher that runs dry usually gives you a few clues. You may hear the machine start and hum, but the tub stays dry. Or it may finish a cycle with detergent still sitting there because it never got enough water. Reality check: a lot of "not filling" complaints are really "filled a little, then washed badly," so pay attention to whether you get no water at all or just a weak fill. Common wrong move: replacing the dishwasher water inlet valve before checking the shutoff valve under the sink or the float in the tub.
Don’t start with: Don't start by ordering a control board or tearing the door apart. Most no-fill calls turn out to be a supply issue, a stuck float, or a clogged inlet screen.
If the tub stays completely dryCheck the water supply and float first.
If you hear water for a few seconds, then nothingLook for a stuck float or a restricted dishwasher water inlet valve screen.
Last reviewed: 2026-04-04
What a dishwasher no-fill problem usually looks like
Very low water level
A little water comes in, but not enough to cover the sump area properly, and dishes come out dirty.
Start here: Check for a partly closed shutoff valve, a kinked dishwasher water supply line, or debris at the dishwasher water inlet valve screen.
Fills briefly, then stops
You hear water for a short burst, then the machine acts like it is full when it clearly is not.
Start here: Focus on the dishwasher float and float switch area first, because a float that hangs up can shut filling off early.
Detergent not dissolving and weak wash action
The cycle runs, but spray sounds are weak, detergent remains, and the bottom looks barely wet.
Start here: Confirm this is really a fill problem before chasing spray arms or wash motor issues.
Most likely causes
1. Water supply to the dishwasher is shut off or restricted
This is the most common and least expensive cause. A stop valve under the sink may be partly closed, recently bumped, or feeding poorly through a kinked line.
Quick check: Find the dishwasher supply shutoff under the sink and make sure it is fully open. Look for a crushed or sharply bent dishwasher water supply line.
2. Dishwasher float is stuck high
When the float stays up, the dishwasher thinks the tub is already full and stops water from entering.
Quick check: Inside the tub, locate the float dome or tower near the front corner and lift it gently, then let it drop. It should move freely and click lightly at the bottom on some models.
3. Dishwasher water inlet valve screen is clogged or the valve is failing
Sediment can choke off flow, or the valve coil can fail so the valve never opens even though the dishwasher is calling for water.
Quick check: If supply is on and the float moves freely, listen near the lower front during fill. A quiet hum with little or no water points toward the dishwasher water inlet valve or its screen.
4. Door latch or control is not actually allowing a fill command
Some dishwashers will drain or make startup noise but will not begin filling if the door is not latching cleanly or the control is not advancing normally.
Quick check: Close the door firmly and restart a normal cycle. If the latch feels loose, the cycle cancels itself, or behavior is erratic, the problem may not be the fill system.
Step-by-step fix
Step 1: Confirm it really is a no-fill problem
A dishwasher that fills weakly, drains out immediately, or has poor wash pressure can look like a no-fill problem from the kitchen floor.
- Start a normal wash cycle with the dishwasher empty.
- Listen through the first minute. You may hear a short drain first; that is normal on many machines.
- After that initial drain, open the door and check the tub bottom.
- Look for standing water in the sump area or a clear water line below the filter area.
- If the tub is bone dry, treat this as a true no-fill problem. If there is some water but wash action is weak, treat it as a low-fill problem.
Next move: If you find a normal water level, the dishwasher is filling and the problem is likely poor washing instead of no fill. If the tub stays dry or only gets a skim of water, move to the supply and float checks.
What to conclude: This separates a true fill failure from lookalike cleaning problems so you do not chase the wrong part.
Stop if:
- You smell burning plastic or hot electrical odor.
- Water appears under the dishwasher or at the sink cabinet while testing.
- The dishwasher trips a breaker or loses power repeatedly.
Step 2: Check the water supply under the sink
A partly closed shutoff valve or pinched supply line is common after sink work, disposal work, or cleaning under the cabinet.
- Turn off power to the dishwasher before reaching around the supply line area.
- Under the sink, find the small shutoff valve feeding the dishwasher line.
- Make sure the valve is fully open, not halfway turned.
- Inspect the dishwasher water supply line for kinks, crushing, or rubbing damage.
- If the line looks sharply bent, straighten only what is easy to correct without forcing fittings.
- Restore power and test the dishwasher again.
Next move: If the dishwasher fills normally after opening the valve or relieving a kink, you found the problem. If supply is clearly available and the dishwasher still stays dry, check the float inside the tub next.
What to conclude: A dry dishwasher with a restricted feed usually has nothing wrong inside the machine itself.
Step 3: Free up the dishwasher float
The float is a simple mechanical overfill safety. If it sticks in the raised position from soap residue, debris, or a utensil bump, filling stops immediately.
- Turn off power to the dishwasher.
- Open the tub and locate the dishwasher float, usually near the front corner of the tub floor.
- Lift the float gently and let it drop several times.
- Remove any debris, hard water buildup, or food residue around the float base using warm water and a soft cloth.
- Make sure nothing under the lower rack or near the float is holding it up.
- Restore power and run a fresh cycle to see whether water now enters normally.
Next move: If the dishwasher fills after the float moves freely again, the float was the issue. If the float moves normally and the tub still stays dry or barely fills, the inlet valve path becomes more likely.
Step 4: Check for a restricted dishwasher water inlet valve path
Once supply and float are ruled out, the next likely problem is the dishwasher water inlet valve not opening fully or its inlet screen being packed with sediment.
- Turn off power to the dishwasher and shut off the dishwasher water supply valve.
- Remove the lower access panel if you can do it without straining wires or hoses.
- Locate the dishwasher water inlet valve where the supply line connects near the bottom front area.
- Inspect for signs of seepage, mineral buildup, or a supply screen clogged with sediment if the screen is accessible without disassembling the valve body.
- If the screen is visibly dirty and accessible, rinse loose sediment away with plain water only. Do not poke the screen with a sharp tool.
- Reassemble, restore water and power, and test for fill.
Next move: If cleaning the accessible screen restores a strong fill, the restriction was at the valve inlet. If supply is on, the float is free, and the dishwasher still gets no water or only a weak trickle, the dishwasher water inlet valve is a strong suspect.
Step 5: Decide between a valve replacement and a pro call
By now you have ruled out the easy no-parts causes. The remaining likely fixes are a failed dishwasher water inlet valve or, less commonly, a latch or control issue that needs deeper testing.
- Replace the dishwasher water inlet valve if the water supply is confirmed on, the supply line is clear, the float moves freely, and the machine still will not fill or only trickles in.
- Consider a dishwasher float assembly if the float is physically damaged or keeps hanging up even after cleaning.
- If the door does not latch firmly, the cycle behavior is erratic, or the machine never seems to call for water at all, stop before guessing at electrical parts.
- If you are comfortable with appliance repair, install the confirmed mechanical part and retest on a normal cycle.
- If the symptom remains after the supported mechanical checks, schedule appliance service for live electrical diagnosis.
A good result: If the dishwasher fills to a normal level and wash action sounds strong again, run a full cycle and check for leaks at the access panel area afterward.
If not: If a confirmed valve replacement does not restore filling, the problem is likely in the latch, wiring, or control side and needs meter-based diagnosis.
What to conclude: This is the point where replacing a supported fill component makes sense. If that does not solve it, deeper electrical testing is the right next move.
Replacement Parts
Repair Riot may earn a commission from qualifying purchases, at no extra cost to you.
FAQ
Why is my dishwasher running but not taking in water?
Most often, the water supply is shut off or restricted, the dishwasher float is stuck up, or the dishwasher water inlet valve is clogged or failed. Start with those before assuming an electronic problem.
Can a dishwasher door latch cause a no-fill problem?
Yes. If the door is not latching properly, some dishwashers will not begin the fill portion of the cycle. Usually you will also notice the cycle acting inconsistent, canceling, or not starting normally.
How much water should be in the dishwasher after it fills?
You usually will not see a deep tub of water. On many models, you should see water pooled in the sump area below the filter and hear strong spray action once washing starts. A bone-dry tub or only a thin skim points to a fill problem.
Should I clean the dishwasher water inlet valve screen?
If the screen is accessible without forcing the valve apart, yes. Rinse loose sediment with plain water. Do not jab the screen with a pick or screwdriver, because it is easy to damage and turn a restriction into a leak.
What if I replace the dishwasher water inlet valve and it still will not fill?
Then the problem is likely outside the simple mechanical fill path, such as a door latch issue, wiring problem, or control fault. That is the point to stop guessing and move to meter-based diagnosis or a service call.