Whirlpool Dishwasher: Not Filling With Water
Quick answer: If the dishwasher starts, hums or runs the pump but the tub stays dry, water is not getting through the inlet valve.
- Turn off the breaker before testing or replacing the inlet valve; it is wired to line voltage.
- Shut the supply valve under the sink and have a towel ready before disconnecting the supply line.
- Do not run the dishwasher dry repeatedly; the circulation pump seal depends on water for cooling.
Why is my dishwasher not filling with water?
If the dishwasher starts, hums or runs the pump but the tub stays dry, water is not getting through the inlet valve. The most common causes are a closed supply valve or kinked supply line, a failed or clogged water inlet valve, a float stuck in the up position, a door switch that is not fully closed, and a control board or timer that never sends power to the valve.
Our fitment data covers 7,658 Whirlpool dishwasher models and 2,722 Whirlpool dishwasher parts, so the part links below are filtered to this brand; always confirm your model number before ordering.
Most Likely Causes, in Order
1. Water supply valve and line
The small shutoff under the sink gets bumped closed, or the flexible supply line kinks when the dishwasher is pushed back into place. Either one starves the inlet valve.
How to check: Open the cabinet under the sink and confirm the dishwasher shutoff is fully open. Follow the supply line to the dishwasher looking for a kink or crushed section. Disconnect the line at the inlet valve over a bowl and briefly open the shutoff; a strong flow rules out the supply.
Fix: Open the valve, straighten or replace the supply line, and replace a shutoff that is seized or clogged with sediment. (Difficulty: Easy)
No Whirlpool part for this cause is in our catalog yet; search by your model number.
2. Water inlet valve
The solenoid valve opens when the board sends power. Sediment clogs its inlet screen, the diaphragm sticks, or the coil burns out, and no water enters even though you can hear the click of the cycle starting.
How to check: With the supply confirmed good, start a cycle and listen at the lower front corner for a hum or click from the valve during the first minute. Silence means no power or a dead coil. With power off, remove the supply line and inspect the screen for sediment, then test the coil for continuity; an open reading confirms failure.
Fix: Clean the screen if that is the only problem; otherwise replace the water inlet valve. (Difficulty: Moderate)
Matching Whirlpool parts:
- Water Inlet Valve W10844024 — $39.02 – $56.77 · 879 models
- Dishwasher Water Inlet Valve WP8531669 — $43.44 – $74.12 · 804 models
- Water Inlet Valve WPW10327249 — $33.29 – $60.91 · 794 models
3. Float and float switch
The float rises with water and trips a switch that stops the fill. If debris holds the float up, or the switch fails in the tripped position, the board thinks the tub is already full and never opens the valve.
How to check: Lift and drop the plastic float at the front of the tub floor; it should move freely and you should hear a click from the switch beneath. Clear any food or utensil trapped under it. With power off, test the switch for continuity with the float down.
Fix: Clean around the float stem, or replace the float switch if it does not click or has no continuity. (Difficulty: Easy)
No Whirlpool part for this cause is in our catalog yet; search by your model number.
4. Door switch
The fill circuit runs through the door switch. A latch that does not press the switch fully leaves the panel lit but blocks the valve and pumps.
How to check: Press firmly on the top of the door while starting a cycle. If water begins to flow, the latch or switch is marginal. Test the switch for continuity with the door latched.
Fix: Adjust the strike or replace the door latch and switch assembly. (Difficulty: Moderate)
Matching Whirlpool parts:
- Dishwasher Door Latch w/Switches No Handle WPW10275768 — $40.74 – $65.42 · 730 models
- Dishwasher Door Latch And Switch Assembly WPW10404412 — $52.58 – $79.15 · 664 models
- Dishwasher Door Handle And Latch Assembly with Switch WPW10130695 — $23.33 – $49.73 · 89 models
5. Main control board or timer
The board or mechanical timer switches power to the inlet valve at the start of each fill. A failed relay or worn timer contact leaves the valve unpowered.
How to check: Suspect this only after the valve, float and door switch test good. Start a cycle and measure for line voltage at the valve terminals during the fill phase. No voltage with a good valve confirms the board, timer or harness.
Fix: Replace the main control board or timer. (Difficulty: Advanced)
No Whirlpool part for this cause is in our catalog yet; search by your model number.
Other Whirlpool parts the catalog tags for this symptom
- Dishwasher Water Inlet WPW10195536 — $51.11 – $78.05 (no water; slow fill; won't fill)
- Dishwasher Capacitor WPW10334457 — $73.12 – $103.35 (humming; motor won't run; won't start)
- Dishwasher Float Switch WP8268909 — $33.25 – $55.62 (fill; intermittent operation; won't start)
- Dishwasher Door Switch WP8269209 — $16.77 – $37.90 (door not detected; won't start)
- Dishwasher Lid Hinge Pin WP3372028 — $9.19 – $13.91 (dispenser stuck; no ice; no water; won't dispense)
- Dishwasher Door Latch Bolt WP3380854 — $37.25 – $61.96 (door won't close; door won't lock; won't start)
Popular Whirlpool dishwasher models
Confirm the model number on the rating plate before ordering. Each model page lists every compatible part.
Frequently Asked Questions
Why does my dishwasher hum but not fill?
The hum is usually the drain or circulation pump running with no water. That means power is present and the cycle started, so the blockage is at the supply, the inlet valve, or the float.
Can low water pressure keep a dishwasher from filling?
Yes. The valve needs a minimum pressure to open properly. If the kitchen faucet is also weak, or the supply line is a narrow, partly clogged pipe, the dishwasher may fill too slowly and time out.
How long should a dishwasher take to fill?
Roughly one to two minutes. If it takes much longer, the inlet screen is likely clogged or the supply pressure is low.
When to Call a Professional
Call a technician if the supply, valve, float and door switch all test good and the valve still gets no voltage, or if replacing the inlet valve means working at the water and electrical connections and you would rather not.