How to Replace a Frigidaire Dishwasher Drain Pump

How the drain pump fails#

The drain pump (part 5304497818) is the smaller of the two motors under a Frigidaire tub — the big one is the circulation pump that drives the spray arms. Debris grinding through the impeller wears the motor out, or the impeller itself cracks or seizes. Either way the machine cannot push water out, so it pools in the sump and the display flags i20 when drainage is merely slow or i40 when it stops entirely. It is one of the most common failures on Frigidaire dishwashers past the five-year mark.

Tools, part, and safety#

• Tools: Torx T15 driver, Phillips #2 screwdriver, needle-nose pliers, 1/4-inch nut driver, towels, and a shallow pan
• Part: Drain pump assembly 5304497818 (price varies by model and region)
• Time: 30-40 minutes · Difficulty: intermediate

Kill power at the breaker and shut off the water supply before you start. Bail out any standing water in the tub — the pump has live electrical terminals, and a wet job under the cabinet is a shock risk if power is not fully off.

Step-by-step#

1. Confirm the pump is the problem#

Rule out the cheap causes first. Lift out the flat mesh filter and clear food debris from the well, check the drain hose under the sink for kinks or clogs, clear the air gap if you have one, and run the disposal to open the shared drain path. Still pooling? Listen during the drain phase: a hum with no water moving means the impeller is jammed or broken; dead silence means the motor has failed electrically.

2. Cut power and empty the tub#

Switch off the breaker. Sponge or vacuum the standing water out of the tub so less spills when you drop the hose later. Lay towels and slide the shallow pan under the front of the machine.

3. Pull the lower access panel#

Remove the two Phillips screws holding the kick plate at the bottom of the door, and set the panel aside. That exposes the underside of the tub and both pumps.

4. Find the drain pump#

The drain pump is the smaller cylinder, usually on the left, with the drain hose running from its outlet toward the disposal or sink drain. Its inlet side feeds from the sump. The larger neighboring pump is the circulation pump — leave it alone.

5. Unplug the pump motor#

A two-wire connector with a locking tab feeds the drain pump. Photograph it for orientation, press the tab, and pull the connector straight off.

6. Free the drain hose#

The outlet nipple is held by a spring clamp. Squeeze the clamp with needle-nose pliers, slide it back along the hose, then twist the hose off the nipple — keep the pan under it, because trapped water will run out. If your model uses a screw-type clamp instead, back it off with a flat-blade screwdriver.

7. Release the pump from the sump#

Most Frigidaire drain pumps use a twist-lock: rotate the pump body about a quarter turn counterclockwise and pull it straight down. Some are held by two or three screws instead. Inspect the rubber gasket or O-ring that seals the pump to the sump; if it is cracked or flattened, replace it (a new one often ships with the pump). Wipe any debris from the sump opening.

8. Fit the new pump#

Set the old and new pumps side by side and confirm the inlet and outlet sizes, the mounting style, and the connector all match. Seat the fresh gasket, drop the pump into the sump opening, and rotate it clockwise until it locks (or start all the screws before tightening any).

9. Reconnect hose and wiring#

Push the drain hose back onto the outlet nipple and settle the spring clamp over the nipple joint — not on the bare hose. Snap the electrical connector back on until the tab clicks.

10. Test and close up#

Restore the water and the breaker, then run a short cycle. When it reaches the drain phase, listen for a smooth whir and check underneath for leaks at both the hose joint and the pump-to-sump seal. After it drains, the filter well should be dry. Reinstall the kick plate with its two screws.

Drain pump vs. other drain faults#

When to call a professional#

Some older Frigidaire models fold the drain and circulation pumps into one assembly — a bigger, costlier job. Call in help if codes persist after the swap (the control-board relay may be at fault), if the sump housing is cracked, or if you find water damage or heavy corrosion under the machine.