How to Replace the Drain Pump on an LG Dishwasher

What OE means and how to confirm#

OE tells you the control board did not see the tub empty in time. Before buying the pump, rule out a clog: clean the filter and check the drain hose for kinks. Then narrow it down two ways — listen on the drain phase (a good pump hums steadily; silence means no power or a dead motor; a hum with no water means a jammed impeller), and meter the motor. Disconnected, an LG drain pump reads about 5-15 ohms across its two terminals; open (OL) or near-zero both mean replace. LG's ThinQ Smart Diagnosis can also read out the logged fault through the phone.

Tools and safety#

• Tools: Phillips #2 screwdriver, Torx T15 (some models), channel-lock pliers, towels, a shallow pan, a multimeter
• Part: LG drain pump 4681EA2001T
• Time: 30-45 minutes · Difficulty: intermediate
• Safety: kill the breaker and unplug the unit under the sink, close the water valve, and keep towels and a pan ready for spillage.

Step-by-step#

1. Prep and drain the sump#

With power and water off, open the door, pull both racks, and bail the standing water out of the sump with a cup or baster. Towels down in front.

2. Open the kick plate#

The lower panel is held by four Phillips screws along the bottom front (some newer LDT models use Torx T15). Remove them and pull the panel down and off. That exposes the underside of the tub — pump, inlet valve, and harnesses.

3. Identify the pump#

The 4681EA2001T is a compact cylindrical motor with a white plastic volute, bottom-left of the tub. A short rubber hose feeds it from the sump, the drain hose leaves the outlet, and a two-pin connector powers it. On Inverter Direct Drive models the wash motor sits on the sump while the drain pump is offset to the left — do not confuse the two.

4. Unplug the pump#

Press the tab on the two-pin connector and pull it off by the housing, not the wires. Photograph the orientation first.

5. Pull the hoses#

With the channel-locks, squeeze each spring clamp and slide it back, then work the hose off — the inlet (the larger port) will pour water, so keep the pan under it. Note which hose is inlet and which is outlet.

6. Release the pump#

Depending on model, one or two Phillips screws hold a bracket, or a twist-lock bayonet does — for the bayonet, turn the body about 30 degrees counterclockwise and pull down.

7. Fit the new pump#

Set the new 4681EA2001T with its ports matching the hose positions, secure it (screws, or clockwise until the bayonet clicks), and push each hose onto its port with the spring clamp seated in the nipple groove — a loose clamp seeps and trips the AE leak error.

8. Reconnect and test#

Click the two-pin connector on, refit the kick plate, open the water, and restore power. Run a Rinse Only cycle and watch the drain phase — the pump should run and push water through the hose, with no leaks at the joints.

LG drain pump at a glance#

After the swap#

• OE persists: reset by unplugging five minutes; if it stays, check the drain hose for a kink between pump and sink.
• Drains slowly: flush the drain hose and confirm it has a high loop up to countertop height, or dirty water siphons back.
• AE (leak) error: a hose joint is seeping — reseat the spring clamps in the grooves.

When to call a professional#

Call a tech if there is 0V at the pump plug during drain (a dead control board), if the connector is burned, if the sump housing is cracked where the pump mounts, or if OE only comes and goes (a failing board relay).