Whirlpool Washer Drain Pump Assembly W11399437

W11399437 is the Whirlpool OEM part number for a washer drain pump assembly used on compatible Whirlpool-manufactured top-load washer platforms. The pump removes water from the tub during the drain portion of the cycle. Whirlpool lists W11399437 as the replacement for W11259498. Confirm the full appliance model number before ordering because similar-looking pumps can use different housings, electrical connections, or mounting arrangements.

Is This the Right Part?

This part may be appropriate when inspection confirms a damaged, obstructed, leaking, or electrically failed drain pump. A washer that does not drain can also have a blocked hose, wiring problem, control issue, or another mechanical restriction, so symptoms alone do not confirm the pump.

Common Symptoms This Part May Address

• Water remains in the washer after the drain portion of the cycle
• Slow or incomplete draining
• Humming, grinding, or unusual noise from the pump area
• Visible leakage or physical damage at the pump assembly
• A drain-related fault after hoses and obstructions have been checked

Part Details

Use the appliance model number and the original pump markings to confirm compatibility. Brand families and model revisions can use different pumps even when the external appearance is similar.

Installation Notes

1. Disconnect electrical power and shut off the water supply before service.
2. Drain or contain residual water before disconnecting hoses.
3. Photograph the original wiring, hose routing, clamps, and mounting arrangement.
4. Inspect the drain hose, tub-to-pump hose, connectors, and surrounding components before installing the replacement.
5. Follow the service information for the exact appliance model or use a qualified appliance technician.

Supported Model Numbers

Model suffixes and production revisions matter. Confirm the complete model number on the appliance identification label before ordering.