How to Replace a Maytag Dishwasher Drain Pump

The drain pump on a Maytag dishwasher is responsible for evacuating all wash and rinse water from the tub at the appropriate points in the cycle. When this pump fails, water remains in the bottom of the tub after the cycle completes, and the control panel typically displays the F9E1 error code (long drain time). Maytag dishwashers use the same drain pump as all Whirlpool Corporation brands: part number WPW10348269. This is a compact motor with an integrated impeller and check valve that mounts directly to the sump housing underneath the tub.

Maytag's stainless steel chopper blade grinds food waste before it reaches the drain pump, which means Maytag pumps tend to last longer than pumps on filter-only dishwashers because large debris is ground down rather than passing through the impeller. However, hard objects that bypass or damage the chopper (glass, metal, broken plastics) can still jam or damage the pump impeller.

Before You Start

• Tools needed: 1/4-inch hex driver, pliers (for spring clamps), Torx T20 driver, towels, shallow pan or baking sheet
• Parts needed: Drain pump WPW10348269 ($35-$65)
• Time required: 25-40 minutes
• Difficulty: Intermediate
• Safety warning: Disconnect power at the circuit breaker and turn off the water supply valve under the sink. Residual water will spill when you disconnect the pump. Have towels and a pan ready.

Step-by-Step Instructions

Step 1: Prepare the dishwasher

Disconnect power at the breaker. Turn off the hot water supply valve under the sink. Remove as much standing water from the tub as possible (scoop with a cup, absorb with towels). Remove the lower dish rack and the filter assembly. Spread towels on the floor in front of the dishwasher and slide a shallow pan or baking sheet under the front of the unit to catch residual water.

Step 2: Remove the lower access panel

The lower access panel (kick plate) is secured by two 1/4-inch hex screws along the bottom edge of the dishwasher front panel. Some models use Phillips screws instead. Remove both screws and pull the panel forward and down. Set aside. You now have access to the underside of the tub and the drain pump.

Step 3: Locate the drain pump

The drain pump is mounted on the left side of the sump housing at the bottom of the tub. It is a compact cylindrical motor with a wire harness connector, a rubber boot connecting it to the sump, and a ribbed drain hose connected to its outlet. It is smaller than the main circulation pump (which is in the center) and positioned lower. Identify it by following the drain hose back from under the sink. The drain hose runs from under the dishwasher to the garbage disposal or sink tailpiece. Trace it back to the pump.

Step 4: Disconnect the electrical connector

Press the locking tab on the wire harness connector and pull it straight off the pump terminals. Take a photo first if needed, though the connector is keyed and only fits one way. If the connector is corroded, note that you may need to replace the harness pigtail as well.

Step 5: Remove the drain hose from the pump

Use pliers to squeeze the spring clamp on the drain hose where it connects to the pump outlet. Slide the clamp back along the hose about 2 inches. Pull the hose off the pump outlet spigot. Water will flow out. Direct it into your pan. If the hose is also damaged, discolored, or rigid, this is a good time to replace it.

Step 6: Remove the pump from the sump housing

The pump attaches to the sump housing with a quarter-turn bayonet mount on most Maytag models. Twist the pump body counter-clockwise approximately 90 degrees until it releases. Pull the pump straight out. Some residual water from the sump will drain when the pump is removed. On some model years, the pump is held by two screws instead of a bayonet mount. Check your model before twisting.

Step 7: Inspect the sump opening and install the new pump

Look into the sump opening where the pump was mounted. Clear any debris. Check the rubber seal ring (gasket) where the pump mates to the sump. If this ring is damaged or hardened, the connection will leak. Replace the ring if necessary (some new pump kits include it). Insert the new pump into the sump opening and twist clockwise until it locks into position (or secure with screws on applicable models). The pump should fit snugly with no wobble.

Step 8: Reconnect hose and electrical, then test

Slide the drain hose onto the new pump outlet spigot and reposition the spring clamp over the connection point. Reconnect the wire harness until it clicks. Reinstall the lower access panel. Restore water supply and power. Run a Cancel/Drain cycle by pressing the Cancel/Drain button on the control panel. Listen for the pump motor engaging (a steady hum for 2-3 minutes). Check under the dishwasher for leaks at the pump-to-sump connection and hose clamp. Then run a full Normal cycle and verify complete drainage at the end.

Diagnosing Pump Failure vs. Other Drain Issues

Before replacing the pump, verify the pump itself is the problem and not a simpler blockage:

• If the pump hums but does not drain: the impeller is likely jammed by debris or broken. Replacement is correct
• If the pump is silent during drain phase: the motor may be burned out (test resistance: 5-40 ohms is healthy, open circuit means failed), OR the control board is not sending power to the pump
• If the pump runs and water moves but drains slowly: the restriction is downstream in the drain hose, air gap, or garbage disposal knockout
• If water returns to the tub after draining: the check valve inside the pump has failed (replacement resolves this)

Why Maytag Drain Pumps Fail

The most common failure modes are:

1. Foreign object damage to the impeller (glass, plastic, metal passing through or bypassing the chopper)
2. Motor winding burnout from running against a blocked drain hose (the pump overheats trying to push water through a restriction)
3. Bearing wear causing the impeller to contact the housing (produces grinding noise before full failure)
4. Check valve deterioration allowing backflow that forces the pump to work harder each cycle

Maytag's chopper system significantly extends pump life by preventing organic debris from reaching the impeller. Most pump failures on Maytag units involve hard objects that the chopper cannot grind rather than food buildup.

Troubleshooting After Pump Replacement

If the dishwasher still does not drain after installing the new pump:

• Verify the drain hose has a proper high loop to the underside of the countertop
• Check the garbage disposal knockout (if newly installed disposal)
• Run diagnostic mode to verify the control board activates the drain pump output
• Check for a kinked drain hose behind the dishwasher or where it passes through the cabinet side wall

When to Call a Professional

Contact a professional if:

• You cannot access the drain pump due to a hard-wired installation that blocks removal of the access panel
• The pump and all drain paths are clear but the F9E1 code persists, suggesting a control board or wiring issue
• Water is leaking from the sump housing itself (not the pump connection), indicating a cracked sump that is a more involved repair

Cost Comparison: DIY vs Professional

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• Dishwasher repair service
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• Dishwasher repair cost guide

FAQ

Q: Is the drain pump the same part for all Maytag dishwasher models? A: Most current Maytag MDB-series dishwashers use pump WPW10348269, which is shared across Whirlpool, KitchenAid, and Maytag. Some older models use different pump configurations. Verify by checking your model number against the parts catalog. The identical part number across brands means wide availability and competitive pricing.

Q: Can I clean a jammed drain pump instead of replacing it? A: Yes, if the jam is caused by debris and the impeller blades are not damaged. Remove the pump, clear the obstruction, and spin the impeller to verify free movement. If the impeller spins smoothly and the motor tests within resistance range (5-40 ohms), reinstall it. However, if the impeller has chipped blades or the motor makes grinding noises, replacement is necessary.

Q: How does the Maytag chopper affect drain pump longevity? A: Significantly. The stainless steel chopper grinds food waste before it reaches the drain pump, eliminating the organic debris that typically damages pump impellers on filter-only dishwashers. This is why Maytag pump failures are more often caused by hard foreign objects (glass, bones) than by gradual food buildup. The chopper is covered by Maytag's 10-year limited warranty.

Q: Why does my Maytag dishwasher drain pump run for a long time? A: The drain pump typically runs for 2-3 minutes per drain phase. Extended operation (more than 4 minutes) suggests a partial restriction in the drain path that the pump is struggling against. Check the drain hose for kinks, the air gap for blockages, and the garbage disposal connection. Prolonged pump operation eventually burns out the motor if the restriction is not cleared.

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