LG Dishwasher Error Code AE

LG Dishwasher AE Error — What It Means and Why It Happens

The AE error on an LG dishwasher is an automatic protection or “auto error” alert that signals the machine has detected an abnormal condition related to water handling, sensors, or internal electronics. It can appear during fill, wash, or drain cycles and often causes the dishwasher to pause or stop entirely to prevent damage or flooding. Common user impacts include interrupted wash cycles, incomplete rinsing or drying, standing water in the tub, increased cycle times, and in some cases the risk of water leaks or electrical faults if left unaddressed.

This code can be triggered by several root issues: a stuck float or debris in the float housing falsely indicating a leak, clogged inlet screens limiting proper water flow, a failing water inlet valve, malfunctioning pressure or leak sensors, problems with the drain pump or sump, or faults on the main control board or wiring harness. Hard water deposits, excess suds from using the wrong detergent, and impact damage from improper loading can also create conditions that lead to an AE message.

Common Causes

• Leaky tub or door seal — Water collecting in the base triggers leak-detection sensors.
• Stuck or obstructed float/float switch — Debris prevents the float from moving freely.
• Clogged inlet screen or low water pressure — Insufficient or irregular water supply.
• Faulty water inlet valve — Valve fails to open/close properly, causing overfill or underfill.
• Blocked drain or failing drain pump — Causes water to remain in the sump and trigger safety logic.
• Faulty pressure sensor / water level sensor — Incorrect level readings cause automatic shutdown.
• Control board or sensor wiring issue — Short, loose connector, or damaged harness causing false error state.
• Excessive suds or incorrect detergent — Foam can leak into float areas or affect sensors.

Troubleshooting Steps

1. Power & safety first — Turn off and unplug the dishwasher, or switch off the breaker. Turn off the water supply to the unit before inspecting internal components.
2. Clear visible water — Remove standing water from the bottom of the tub and base pan with towels or a shallow pump; water in the base can keep the AE triggered until fully dried.
3. Check the door seal and tub — Inspect gasket and tub for cracks or areas where water could escape; tighten or replace worn seals.
4. Inspect and free the float assembly — Locate the float/float switch (usually at the bottom of the tub), clear debris and ensure it moves freely up and down.
5. Examine the inlet screen and supply hose — Turn off water, disconnect supply, and clean the inlet screens/filters; verify adequate household water pressure.
6. Test drain pump and check for clogs — Remove and inspect filters and sump area for debris, and ensure the drain hose isn’t kinked or clogged.
7. Run a manual diagnostic cycle — Many LG dishwashers have a service or diagnostic mode that reads stored error codes and runs basic tests; consult your user manual for entry instructions.
8. Reset the dishwasher — After clearing issues, reset by turning off power at the breaker for 1–5 minutes, then restore power and run a short cycle to see if AE returns.
9. Inspect wiring and connectors — Look for loose connectors, corrosion, or damaged wires near sensors, pumps, and the control board (only if you are comfortable and safe with basic electrical checks).
10. Replace suspect components — If diagnostics indicate a bad inlet valve, float switch, pressure sensor, drain pump, or control board, replace the failed part (see parts list below). Always power down before replacing parts.
11. When to call a pro — If the error persists after basic checks, if you find a leak inside the base requiring access under the machine, or if the control board appears damaged, call an authorized LG technician. Electrical repairs, major component replacements, and internal leak fixes are best handled by a professional.

Maintenance / Prevention Tips

• Use only dishwasher-safe detergents formulated for automatic dishwashers — avoid hand-washing soaps that create excess suds.
• Rinse or scrape heavy food debris before loading to reduce clogging the sump and filters.
• Clean the filter, spray arms, and sump regularly (monthly or as recommended) to prevent blockages.
• Check and gently clean the float and float housing to ensure free movement.
• Inspect door gasket periodically and replace if cracked or compressed to prevent leaks.
• Keep the dishwasher level — an uneven unit can allow water to pool and trigger leak sensors.
• Run a cleaning cycle with dishwasher cleaner every 1–3 months to dissolve mineral buildup from hard water.
• Do not overload dishes or block spray arms — ensure free rotation and proper water distribution.
• Use a water softener or descaler in hard-water areas to reduce mineral deposits on sensors and valves.
• Check supply hoses yearly for wear, bulging, or corrosion; replace aging hoses proactively.
• Avoid using too much rinse aid — excessive runoff can cause foam and sensor errors.
• Promptly address any small leaks—minor drips can cause bigger issues if left unchecked.
• Keep the area under and around the dishwasher dry and free of stored items that could hide leaks.
• Follow manufacturer service intervals and have a technician perform preventive checks if used heavily (e.g., large families or commercial-like use).

FAQs — LG Dishwasher AE Code

Conclusion & Safety Notice

AE errors are a built-in safety response from your LG dishwasher and should be treated seriously. Basic troubleshooting (power reset, clearing standing water, cleaning the float and filters) is safe for most homeowners, but never work on live electrical circuits — always disconnect power and water first. If you detect a persistent leak, burned electronics, or you’re uncomfortable performing internal checks, stop and call a qualified technician. Attempting complex repairs without proper training can cause further damage or safety hazards.

If the AE code persists after basic troubleshooting, or if you suspect control board failure, significant leaks, or complicated electrical faults, contact LG customer support or a certified appliance repair technician. Professional diagnosis ensures safe, lasting repairs and helps protect your home from water and electrical risks.