Maytag Dishwasher Water Inlet Valve Replacement

The board sends a 120V signal to the solenoid to open the valve at each fill, and drops it to let a spring reseat the plunger when the water-level pressure switch says the tub is full.

How the valve works#

A solenoid coil surrounds a plunger; energized, it lifts the plunger off its seat so water flows through the valve body and a fill tube into the tub, and de-energized, the spring pushes it back down to seal. A mesh screen at the inlet traps sediment from the supply line. On Maytag dishwashers the water enters through a fill funnel on the left interior wall, runs down into the sump, and the pump sends it to the spray arms. Some models use a single (hot-only) inlet valve, others a dual-inlet valve that blends hot and cold.

Signs it's failing#

• No fill at all — the solenoid has failed or mineral scale has stuck the plunger closed.
• Slow fill (5-plus minutes) — a partly clogged inlet screen, or a weak solenoid opening only partway.
• Continuous fill after the cycle starts — the plunger is stuck open, a flood risk.
• Fills when it isn't running — the diaphragm or seal has failed and water seeps past the closed plunger, which can flood overnight.
• Banging or chattering during fill — water hammer from a partly open valve or a loose plunger.

A valve that leaks while off is the urgent one: shut the supply valve under the sink immediately and replace the valve before running the dishwasher again.

Replacing the valve#

1. Cut power at the breaker and shut the water supply under the sink.
2. Remove the lower kickplate (two 1/4-inch hex screws) and lay down towels.
3. Disconnect the supply line at the valve inlet with pliers (catch the drip).
4. Release the fill tube from the valve outlet — usually a push-fit or spring clamp.
5. Unplug the solenoid connector (one or two, depending on single or dual valve).
6. Remove the mounting-bracket screws (1–2) and pull the old valve.
7. Inspect and clean the inlet screen, fit the new valve, and reconnect the fill tube, supply line, and connector.
8. Open the water and check both connections for leaks before restoring power, then run a fill test — the tub should reach level in 2–3 minutes.

Tools: adjustable pliers, a 1/4-inch hex driver, Phillips #2, towels, and a shallow pan.

The free fix, and cross-reference#

Before buying anything, check the inlet screen: this small mesh filter clogs with sediment, especially in hard water, and produces the exact slow- or no-fill symptoms of a bad valve. Clean it with a toothbrush — it resolves about 30 percent of slow-fill complaints for free. When you do need the valve, Maytag dishwashers ride the Whirlpool platform, so cross-reference the Whirlpool W10 or WP part number for a better price, and check the 10-year limited parts warranty first. Valves generally last 8–12 years, with hard water accelerating buildup on the seat and diaphragm, so an annual screen cleaning is the best way to extend one. And don't over-tighten the brass supply fitting on reassembly — cross-threading it starts a slow weep that corrodes the valve body over the months that follow.

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