How to Replace a KitchenAid Water Inlet Valve
Replacing the water inlet valve (W10872255) on a KitchenAid dishwasher is an intermediate, 30-45 minute job for a unit that will not fill or fills slowly. You shut off water and power, disconnect the supply line, fill hose, and wiring behind the kick plate, and swap the valve — but check the inlet screen first,…
The inlet valve is a solenoid: when the board sends 120V AC to the coil, an internal diaphragm opens and water flows; cut the power and a spring shuts it. It fails two ways — the coil burns open (no fill) or the diaphragm stops sealing (a slow leak when off).
Before you start#
| Item | Use |
|---|---|
| 1/4-inch hex nut driver | Kick plate |
| Adjustable wrench | Supply line |
| Needle-nose pliers | Hose spring clamp |
| Multimeter, bucket, towels | Testing and spills |
Safety warning: Turn off the water supply valve under the sink FIRST, then disconnect power at the circuit breaker. Residual water under pressure is in the supply line. Have a bucket and towels ready. The inlet valve is located behind the kick plate on the lower left side of the unit.
Do You Have the Right Tools?
Water pressure gauge ($60), spray arm tester, float switch multimeter ($85), and drain inspection camera. Our technician arrives with $3,000+ in professional tools — your diagnostic is free.
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Confirm the valve first#
Check the under-sink supply valve is fully open (the most common false alarm) and the supply line is not kinked. Pull the kick plate and inspect the valve's small inlet mesh screen — sediment clogs it over time, so clean it and retest before buying anything. If the screen is clear, disconnect power and the wiring and meter the solenoid: 500-1500 ohms is normal, while open (OL) means the coil is burned out. For a slow leak with the machine off, close the supply valve — if the water stops, the diaphragm is not sealing and the valve needs replacing.
Step-by-step#
1. Shut off water and power#
Close the under-sink supply valve (usually a quarter-turn ball valve on the hot line) and switch off the dishwasher breaker. Set a bucket under the supply-line connection.
2. Remove the kick plate#
Take out the two 1/4-inch hex screws at the lower front and pull the kick plate down and away.
3. Locate the valve#
It sits at the lower left as you face the unit — a black or blue plastic body with a brass inlet fitting for the household supply and a rubber hose outlet running up to the tub, with the solenoid coil on top.
4. Disconnect the supply line#
Loosen the brass compression or braided-line nut with an adjustable wrench, turning counterclockwise; water drains into the bucket. Remove the nut and pull the line off the inlet.
5. Disconnect the fill hose#
Squeeze the spring-clamp ears on the outlet hose with pliers, slide the clamp back, then twist and pull the hose off the barb.
6. Disconnect the wiring#
Press the tab on the two-pin connector and pull it straight off; it is keyed and only refits one way, but note the orientation anyway.
7. Remove the mounting bracket#
The valve is held to the frame by a bracket with one or two screws (Phillips or Torx T20 by model year). Remove them and slide the valve out.
8. Install the new valve#
Set the new valve in the bracket and screw it down, reconnect the wiring until it clicks, refit the fill hose and slide its clamp back into place, then thread the supply line onto the inlet and tighten the nut.
9. Check the inlet screen#
Confirm the new valve's inlet screen is seated — some ship without one, so transfer the old screen if it is in good shape.
10. Test for leaks#
Open the water supply slowly and watch the supply and fill-hose connections for drips, then restore power and start a cycle; you should hear water enter within about thirty seconds. Keep watching from below for leaks.
Safety First — Know the Risks
Live 120V wiring in a wet environment is one of the most dangerous DIY scenarios. Water + electricity = serious shock risk. Our techs are licensed and insured — let them handle the risk.
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Troubleshooting#
- No fill and F8E4 persists: confirm the connector is seated, then check for 120V AC at the valve during fill — no voltage means the board is not sending the signal.
- Weak flow: you may have over-tightened the compression fitting and collapsed the line, or the inlet screen is in backwards.
- Hums but no flow: pressure may be too low; the valve needs 20-120 PSI to operate.
- Water still appears when off: confirm the supply valve is closed — if that stops it, the new valve is working.
When to call a professional#
EasyBear technicians serving Sacramento and the Bay Area carry KitchenAid-specific diagnostic tools and replacement parts on every service call. Call one if the supply uses a non-standard or soldered connection, if error codes persist after the swap and point at the board, or if you find corrosion on the supply line or bracket that means replacing the line too.
The Real Cost of DIY
Average DIY attempt: $150-400 in tools you may use once, plus the risk of further damage. Our diagnostic visit costs $0 — we find the problem and give you an honest quote.
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Need Professional Help?#
Not sure you want to DIY this? Book a diagnostic and we'll confirm the fix before any work starts.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
