LG dishwashers are some of the quietest and most efficient units on the market, which is why they're popular in open-concept kitchens across Southern California. But when something goes wrong, LG communicates through error codes on the display panel. Understanding what these codes mean can save you time, money, and a sinkful of dirty dishes.
Here's a complete breakdown of LG dishwasher error codes, what causes them, and what you can do before calling for service.
Most Common LG Dishwasher Error Codes
OE — Drain Error
The OE code means water isn't draining from the dishwasher. This is the most common error code we see in the field. Common causes include a kinked drain hose, a clogged filter basket, food debris blocking the drain pump, or a garbage disposal knockout plug that was never removed (common in new installations). Start by cleaning the filter at the bottom of the tub—pull it out, rinse it under running water, and clear any food debris. If the filter is clean, check that the drain hose isn't kinked behind the unit.
IE — Water Inlet Error
The IE code indicates the dishwasher isn't filling with water. Check that the water supply valve under the sink is fully open. Also inspect the inlet hose for kinks. If your home has hard water (common in parts of Simi Valley and Thousand Oaks), mineral deposits can clog the inlet screen. You can clean this screen yourself—turn off the water, disconnect the inlet hose, and clean the small mesh screen at the valve connection.
LE — Motor Error
The LE code signals a problem with the wash motor. This can sometimes be triggered by overloading the dishwasher or by a stuck spray arm. Try resetting the dishwasher by turning off the circuit breaker for 30 seconds, then restart a cycle. If the code returns, the wash motor or its wiring likely needs professional attention. Don't attempt motor repairs yourself—the dishwasher uses 120V components that can be dangerous.
AE — Leak Detected
The AE code means the leak sensor in the base of the dishwasher has detected water. This could be from a leaking door gasket, a cracked sump, a loose hose connection, or condensation from a faulty heating element. Pull the dishwasher out (carefully—don't damage the water lines) and check the base pan for water. If you find water, inspect all hose connections. If the gasket around the door looks worn or compressed, it likely needs replacement.
HE — Heater Error
The HE code indicates the water isn't reaching the proper temperature. The heating element may be burned out, the thermistor (temperature sensor) may be faulty, or there could be a wiring issue. The water temperature should reach approximately 140°F during the wash cycle. Without proper heating, dishes won't sanitize properly and drying performance will suffer. This repair typically requires a technician.
FE — Fill Error (Overfill)
The FE code means the dishwasher is detecting too much water. The water inlet valve may be stuck open, or the water level sensor may be malfunctioning. Immediately turn off the water supply to the dishwasher and don't run it again until the issue is diagnosed. A stuck-open inlet valve can cause flooding.
tE — Thermistor Error
The tE code points to a temperature sensor failure. The thermistor monitors water temperature throughout the cycle. When it fails, the dishwasher can't regulate heating properly. This is a straightforward part replacement for a technician but not a practical DIY repair since it involves accessing internal components.
Quick Reset Procedure
Many LG error codes can be cleared with a simple reset:
- Turn off the dishwasher at the circuit breaker
- Wait 30 seconds
- Turn the breaker back on
- Run a rinse-only cycle to test
If the error code returns after a reset, the underlying issue hasn't resolved itself and you'll need professional diagnosis.
When to Call for Professional Repair
- LE code persists after reset — motor or pump failure
- AE code with visible water in base pan — active leak needs immediate attention
- HE or tE codes — electrical components that require professional replacement
- FE code — stuck inlet valve is a flooding risk
- Any code that returns repeatedly — intermittent issues often worsen over time
TruePro technicians carry common LG dishwasher parts on every service truck, including drain pumps, inlet valves, heating elements, and control boards. Our dishwasher repair service covers all LG models with same-day availability and a 90-day warranty on parts and labor.
Whether you're in Pasadena, Anaheim, or anywhere in our service area, we'll decode the error, diagnose the root cause, and fix it right the first time.