LG LDFN343LS/00 dishwasher Parts

On your LG LDFN343LS dishwasher, the most reliable way to clear many active error displays is to cancel the cycle and drain: press and hold Start for 3 seconds. If the code comes back, the dishwasher is still detecting the problem and it will not stay “reset” until the cause is corrected.

Fast reset steps that match this model

Use these in order:

• Cancel and drain: press and hold Start for 3 seconds; the drain pump runs and the unit powers off after draining.
• Restart the cycle: press Power, select a cycle, then press Start (close the door within 4 seconds if prompted).
• If “CL” is showing: press and hold Flex Zone + High Temp. for 3 seconds to toggle Control Lock off.

For the exact button functions and Control Lock behavior, see the LDFN343LS manual.

What common codes mean on LDFN343LS

These codes typically return until the underlying condition is fixed.

Code	What it indicates	What we recommend checking first
OE	Drainage problem	Kinked/clogged drain hose, clogged filters, clogged air gap or disposal
IE	Water inlet problem	Water supply turned on, inlet hose not kinked/clogged/frozen
bE	Oversudsing or leveling issue	Use only automatic dishwasher detergent, confirm dishwasher is level
AE	Water leakage	Turn off water supply and arrange service
N:# / U:# / d:# / t#	Test mode (not an error)	Power off and back on; code should disappear

When a part may be involved

If you’ve cleared the code and verified hoses, filters, and installation basics but the same code keeps returning, a component may be failing.

• Repeating OE after clearing restrictions can point to a drain pump issue: LG dishwasher drain pump ABT72989206
• Repeating IE with good water supply can point to an inlet valve issue: dishwasher water inlet valve 5221DD1001E

Why it matters

On the LDFN343LS, error codes are protective. Canceling clears the current cycle, but the control will display the code again if it still senses a drain, fill, leak, or suds condition.

Last updated: January 2026

On the LG LDFN343LS, we force a drain by canceling the cycle: press and hold Start for 3 seconds. The drain pump will run, and when draining is finished the dishwasher powers off. For button details, see the LDFN343LS owner's manual.

Steps to force-drain the LDFN343LS

• Press Power (if the dishwasher is off).
• Press and hold Start for 3 seconds.
• Wait while the drain pump runs (you should hear water moving).
• Let the unit finish; it should turn off automatically after draining.
• If water remains, remove the lower rack and check the filter area for debris before trying again.

If it will not drain after you cancel

Most drain failures are a blockage in the drain path or a drain-system component issue.

• Check the drain hose routing for kinks, pinches, or crushing.
• If connected to a garbage disposal, confirm the knockout plug was removed.
• Clean the filters and check the sump opening for foreign objects.
• Clean the external air gap (if your plumbing uses one).
• If you see an OE (drainage) code, focus on hose routing and clogs first.

Parts commonly involved (model-compatible examples)

Symptom	What to check	Model-compatible part example
Hums but does not move water	Drain pump impeller jammed or pump failed	LG dishwasher drain pump ABT72989206
Water returns to tub after draining	Check valve sticking or blocked	Dishwasher drain check valve MJX63511301

Why it matters

Standing water can trigger OE errors, cause odors, and reduce wash performance. Forcing a drain clears the tub so you can safely inspect the filter, drain hose connection, and drain pump.

Last updated: January 2026

For an LG LDFN343LS dishwasher, the closest thing to a “force reset” is canceling the cycle or power-cycling the unit. To cancel and drain, press and hold Start for 3 seconds; for a full reboot, turn power off at the breaker (or unplug), then restore power and restart.

Reset methods that are model-correct for LDFN343LS

• Cancel and drain (recommended first step): Press and hold Start for 3 seconds; the drain pump runs and the unit powers off after draining.
• Power cycle (reboots the control): Turn the dishwasher off, then cut power at the circuit breaker (or unplug if accessible). Restore power, then select a cycle and press Start.
• Control Lock (CL) on display: Press and hold Flex Zone and High Temp. together for 3 seconds to toggle Control Lock.
• Start sequence issue: If you press Start, close the door within 4 seconds or the cycle won’t begin.

What we avoid claiming (and why)

LG’s documentation for the LDFN343LS does not specify an exact “wait time” (such as 5 minutes) for a power reset. A power cycle still helps many electronic glitches, but the key is fully removing power and then restoring it.

If it still won’t run after a reset

• Check for an error code and troubleshoot that condition first.
• Confirm the door is fully closed and latching.
• Verify the breaker is on and the dishwasher has power.
• If the unit won’t drain after canceling, check for a kinked/clogged drain hose or a drain restriction; a failed pump can also be involved.

Reset vs. cancel (quick comparison)

Action	How to do it on LDFN343LS	What it does
Cancel and drain	Hold Start 3 seconds	Stops cycle, pumps water out, powers off
Power cycle	Breaker off, then on	Reboots the electronic control

Why it matters

Using the correct reset method helps you quickly separate a simple control issue from a real problem like a drain restriction, Control Lock, or a component failure.

For the exact button functions and control panel behavior, use the LDFN343LS owner’s manual. If draining is the issue, the LG dishwasher drain pump ABT72989206 is the component that moves water out during cancel/drain.

Last updated: January 2026