How to Replace a Dishwasher Inlet Valve: Step by Step

Before you start: safety and tools

Replacing a dishwasher inlet valve is a straightforward repair, but it involves both plumbing and electricity. Begin by unplugging the dishwasher or turning off the circuit breaker at the panel. Next, close the water supply shutoff valve beneath the kitchen sink. This valve is usually a small lever or knob on the hot water line that feeds the dishwasher. If you are unsure which line goes to the dishwasher, trace it from the bottom of the unit. For guidance on understanding the electrical side, see the dishwasher electrical connection article.

You should also have your dishwasher's model number handy to source the correct replacement part. If you are not sure what the inlet valve does or how it works, read dishwasher inlet valve explained before you start. That article explains the electrical and water connections you are about to handle.

• Screwdriver (Phillips or flathead, depending on your machine)
• Adjustable wrench or pliers
• Small bucket or towel
• New inlet valve that matches your model
• Thread seal tape (plumber's tape) if the new valve uses threaded fittings

Remove the old valve

After disconnecting power and water, remove the lower access panel at the front of the dishwasher. This panel is typically held by a few screws along the bottom edge. Set the panel aside. You will see the water inlet valve mounted at the side or bottom of the chassis, near where the supply hose enters. The valve has two wire terminals and a small inlet screen where the supply hose attaches.

• Place a towel or bucket under the supply hose connection to catch any water left in the line.
• Use an adjustable wrench to loosen the nut that connects the supply hose to the valve. Be prepared for a small amount of water to spill.
• From inside the dishwasher, disconnect the fill hose that runs from the valve outlet up to the tub. This may be secured with a clamp; loosen the clamp and pull the hose off.
• Pull the wire terminals off the valve. Note which wire goes to which terminal: a red or black wire connects to the silver terminal, and a white or blue wire connects to the brass terminal. If the wires are not color-coded, take a photo before disconnecting.
• Remove the screws that hold the valve bracket to the chassis, then lift the valve out.

Check the inlet screen

Before installing a new valve, inspect the inlet screen, the fine mesh that sits where the supply hose attaches. Hard water deposits, sand, or debris can clog this screen, reducing water flow even if the valve itself is functional. If the screen is only dirty, you might be able to clean it with a soft brush and save the cost of a new valve. Use the dishwasher water inlet filter cleaning guide for detailed cleaning steps.

If you are replacing the valve because it is leaking or stuck, do not try to reuse it. Install a new valve that matches your model. A leaking valve can waste a significant amount of water; the EPA notes that the average family in the U.S. uses more than 300 gallons of water per day at home, and a continuously leaking inlet valve will add to that. Efficient repair helps conserve water and energy, which is why ENERGY STAR certifies dishwashers that meet strict water and energy criteria. See dishwasher inlet water pressure to understand how the supply affects valve operation.

Install the new valve

Position the new valve in the same orientation as the old one, with the inlet screen facing the supply hose connection. Secure the bracket to the chassis with the screws you removed. Reconnect the fill hose to the valve outlet, and tighten the clamp. Then reconnect the wire terminals: push each female connector onto the appropriate male terminal until it snaps. Check that the connectors are not loose; a poor connection can cause the valve to overheat or fail to open. If your dishwasher is hardwired rather than plug-in, follow the safety steps in hardwired vs plug-in dishwasher installation before working with the wiring.

Reconnect and test

Attach the supply hose to the new valve. Use thread seal tape on the threads if the fitting is threaded, and tighten the nut firmly with the wrench. Do not overtighten; that can crack the valve body. Once the hose is connected, open the water shutoff valve slowly and check for leaks. Let the connection sit for a few minutes, then feel along the valve and hose for moisture.

After confirming there are no leaks, restore power to the dishwasher. Run a short rinse cycle and watch the machine fill. It should stop filling once the proper level is reached. If you notice a continuous fill or the machine does not fill at all, you may have a wiring or water pressure issue. See dishwasher not filling with water for troubleshooting. Also check that the new valve closes properly by turning off the water and running a drain cycle; if water still enters, the valve may be stuck open. See dishwasher inlet valve stuck open for more.

What to pick for your use

Questions

How do I know if my inlet valve is bad?

If the dishwasher won't fill, fills continuously, or leaks from the valve area, the valve is likely faulty. Also check the inlet screen for clogs before replacing.

Can I clean the inlet screen instead of replacing the valve?

Yes, if the screen is only clogged. Remove the valve, take out the screen, and clean it with a soft brush or water. Reinstall and test.

What tools do I need?

Screwdriver, adjustable wrench, bucket, towel, and the new valve. Thread seal tape is needed if the fitting is threaded.

Is it safe to work on the valve without unplugging the dishwasher?

No. Always disconnect power at the circuit breaker or unplug the unit before handling wires.

Do I need to turn off the water valve?

Yes. Close the shutoff valve under the sink to prevent water spray and flooding.

How long does the repair take?

Typically 30 to 60 minutes for someone comfortable with basic tools. Allow extra time for testing.