How to Replace a Whirlpool Dishwasher Drain Pump

Whirlpool runs the W10876537 pump across most WDT and WDF models (older ones use WPW10348269 — check your tech sheet). The pump lives in the sump under the machine, so you reach it by tipping the dishwasher back or laying it down.

Tools and parts#

• Tools: Torx T20 driver, 1/4" hex nut driver, needle-nose pliers, channel-lock pliers, towels, a shallow pan, a multimeter for testing
• Part: drain pump W10876537, plus its O-ring (usually in the box)
• Time: 45-60 minutes
• Difficulty: Intermediate
• Safety warning: Disconnect power at the circuit breaker AND unplug the dishwasher junction box under the sink. There will be residual water in the sump — have towels ready.

Step 1 — Cut power and water#

Trip the dishwasher's breaker (usually a dedicated 20A circuit), close the hot-water valve under the sink, cancel any running cycle, and leave the door open a few minutes to let the heat off.

Step 2 — Drop the kick plate#

Two 1/4" hex screws hold the lower access panel, one at each end. Back them out and the panel drops away, exposing the underside wiring, supply line, and drain hose.

Step 3 — Disconnect the drain hose#

Slide a pan under the pump area, squeeze the spring clamp on the drain hose with pliers and slide it back, then pull the hose off the pump nipple — expect a cup or two of water. Free the hose at the disposal or air-gap end too so the system drains fully.

Step 4 — Pull the dishwasher out#

Open the door, remove the two Torx T20 screws at the top inner edge that anchor the unit to the counter, close it, and slide the machine forward onto cardboard or a blanket, leaving room to tip it back.

Step 5 — Reach the pump from below#

Tip the dishwasher back to about 45 degrees, propped or held, and find the pump on the bottom of the sump. The drain pump is the smaller of the two motors — the big one is the wash/circulation pump — and it carries a two-wire connector plus one outward-facing hose.

Step 6 — Unplug and test#

Press the tab on the two-pin connector and pull it straight off, never by the wires. To confirm the pump is dead before swapping it, meter across the two terminals: 5-40 ohms is normal and an open (OL) reading is a burned-out winding.

Step 7 — Remove the old pump#

Depending on year, the pump is a quarter-turn bayonet or held by 2-3 Torx T20 screws. For a bayonet, twist it about 30 degrees counterclockwise and pull straight down; for screws, back out the T20s and let it drop. Note how the outlet points for the rebuild.

Step 8 — Clean the sump port#

Before the new pump goes in, check the sump seat for food debris or broken glass that may have killed the old one, and make sure the O-ring surface is clean and unnicked — a nick here leaks. Pull the old O-ring completely.

Step 9 — Install the new pump (W10876537)#

Seat the new O-ring, set the pump with its outlet aimed like the original, and lock it in — bayonet mounts twist clockwise 30 degrees until they catch, screw mounts snug down on the T20s without cranking, since the plastic housing cracks.

Step 10 — Reconnect wiring and hose#

Push the two-pin connector back on until it clicks, slide the drain hose onto the outlet nipple, and seat the spring clamp fully over the barb.

Step 11 — Reinstall the dishwasher#

Slide it back under the counter, drive the countertop mounting screws (T20), reconnect the drain hose to the disposal or air gap, open the water valve, refit the kick plate (two 1/4" hex screws), and restore the breaker.

Step 12 — Test the new pump#

Run a quick rinse — leave the kick plate off to watch — and listen for the drain pump to hum steadily for 30-60 seconds at the end. Check every joint for leaks. If an F5E2 was stored, enter diagnostics to clear it with the tech sheet's three-button sequence within 4 seconds (often Heated Dry, Normal, Heated Dry on WDT models).

Common follow-ups#

• F5E2 comes back: clear the stored code first, then check the drain hose for kinks and the sink air gap for a clog, and confirm the pump connector is fully home.
• Pump runs but no water moves: the new pump's check valve may be stuck — pull and reseat it, and make sure no shipping plug is left in the outlet.
• Leak at the pump: the O-ring is pinched or the bayonet is not fully locked — remove, inspect, and reseat.
• Grinding noise: debris in the sump is reaching the impeller, so clear the sump and check the chopper blade (W10083957) above it is intact.

When to call a professional#

Get help if you cannot safely tip or pull the unit (granite tops, hardwired power), if the circulation pump failed too (both at once usually means a surge hit the board), if the sump housing itself is cracked, or if working under a tipped machine or wiring it up is beyond your comfort. EasyBear technicians serving Sacramento and the Bay Area carry Whirlpool parts and diagnostic tools on every call.

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