Can I keep running the equipment with this fault active?

Generally no. Faults on Appliance units are emitted when a sensor, safety, or control circuit is outside its operating envelope. Running through an active fault risks compressor, heater, or control-board damage. Diagnose and clear the fault first.

What part is most commonly replaced for Whirlpool Dishwasher Sump Assembly / Sump Seal Replacement?

The most frequently replaced parts for Whirlpool Dishwasher Sump Assembly / Sump Seal Replacement are listed in the Parts Reference section of this guide with OEM part numbers and typical price ranges. Check the table for direct replacements.

Is Whirlpool Dishwasher Sump Assembly / Sump Seal Replacement a DIY repair or do I need a technician?

Sensor swaps, fan motor replacements, and condenser cleaning are typical DIY-level repairs. Anything involving refrigerant, gas, or high-voltage (>240V) work requires a licensed technician for both safety and code-compliance reasons.

Whirlpool Dishwasher Sump Assembly / Sump Seal Replacement

Q: What does Whirlpool Dishwasher Sump Assembly / Sump Seal Replacement mean?

Water pooling under the dishwasher or in the base pan signals a failing sump seal or diverter shaft seal. Replacing the sump assembly stops the leak.

Q: How do I fix Whirlpool Dishwasher Sump Assembly / Sump Seal Replacement?

Follow the step-by-step diagnosis below. The most likely fix is identified by checking power, sensor resistance, and control-board signals in order — using a multimeter and the part numbers documented in the parts reference table.

Whirlpool Dishwasher Sump Assembly / Sump Seal Replacement — What This Part Does

The sump assembly is the lower pump housing that seals to the dishwasher tub and carries the circulation pump, drain pump, and diverter motor components. The sump seal creates a watertight interface between the sump housing and the tub. In Whirlpool dishwashers the most common failure point is the seal around the diverter motor shaft, which allows water to escape into the base area during wash cycles. The sump assembly includes outer housing seals and diverter motor seals that are not available separately, so the entire sump is replaced when sealing fails.

Over time the diverter shaft seal wears from motor rotation and pressure, and the sump-to-tub seal can flatten or become contaminated with mineral buildup and debris. If the sump housing cracks or the retaining tabs do not lock properly, the seal cannot hold. Water leaking at the sump perimeter or diverter area will pool in the base pan and may trigger poor wash performance or visible leaks under the unit.

Jump to Replacement Steps

Signs It Needs Replacing

Water pooling in the base pan or under the dishwasher Visible water in the kickplate area or dripping from underneath signals a sump seal leak.
Moisture or water tracks around the sump perimeter Drips or water residue on the sump housing or tub connection indicate a failed sump-to-tub seal.
Water escaping from the diverter motor area Leakage around the diverter shaft is the most commonly cited failure point for the sump seal.
Poor wash performance or insufficient spray A sump leak can reduce water pressure to the spray arms and affect cleaning results.
Visible cracks or damage to the sump housing Cracked plastic or broken retaining tabs prevent the seal from seating and holding pressure.
Mineral buildup or debris on the sump mating surface Contamination on the tub lip or sump flange prevents a tight seal and allows seepage.

How to Replace It

Unplug the dishwasher and shut off the water supply valve under the sink or at the connection point.
Pull the dishwasher out from the cabinet and disconnect the drain hose, fill line, and any electrical connections at the junction box.
Tip the dishwasher on its back to access the underside and remove the lower access panel or base plate.
Disconnect the drain pump, circulation pump, diverter motor wiring harness, turbidity sensor (if equipped), and all hose clamps and water lines connected to the sump assembly.
Release the sump retaining tabs or clips around the perimeter and carefully pull the old sump assembly down and away from the tub.
Clean the tub mating surface thoroughly with a cloth and mild detergent to remove any buildup, debris, or old seal material that could prevent a proper seal.
Align the new sump assembly with the tub opening, matching the notch or alignment tab, and press the sump up into place until the seal seats evenly around the perimeter.
Lock all retaining tabs or clips around the sump perimeter to secure the housing to the tub.
Reconnect the circulation pump, drain pump, diverter motor, sensor wiring, and all hoses and clamps in reverse order, then reinstall the base panel, reconnect the fill line and drain hose, restore power and water, and run a test cycle to check for leaks underneath and around the sump area.

The Part You Need

Part	Notes
Whirlpool dishwasher sump assembly with seal	Amazon \| Check your model and serial number on the dishwasher door frame or inner tub for the correct part number. Common OEM sump assemblies include WPW10455268, W10455268, WP8572618, and W10837401 for Whirlpool, KitchenAid, and Maytag models.

If this part is failing you may also see one of these codes:

When to Call a Pro

If you are uncomfortable tipping the dishwasher on its back, disconnecting multiple pump and motor connections, or working under the unit in confined space, call a qualified appliance technician. If the leak source is unclear or water is coming from hose fittings, the circulation pump, or the tub itself rather than the sump seal, a professional diagnostic is the safest approach to avoid unnecessary parts replacement and to confirm the exact failure point.