What AE means

LG dishwashers have a leak detection float switch in the base pan underneath the tub. When water collects in this pan — from an internal leak, oversudsing, or a tilted machine — the float rises and triggers AE (Aqua Error). The dishwasher immediately stops the cycle and activates the drain pump.

Act immediately: Turn off the dishwasher and the water supply valve under the sink. Do not run another cycle until the leak source is found and fixed.

Step-by-step fix

  1. Turn off the water supply at the shut-off valve under the sink.
  2. Unplug the dishwasher or turn off the circuit breaker.
  3. Check for visible water. Look under and around the dishwasher for puddles.
  4. Check the door gasket. Inspect the rubber seal around the door for tears, warping, or food debris preventing a proper seal.
  5. Check for oversudsing. If you used regular dish soap instead of dishwasher detergent, excessive foam can overflow and reach the base pan. Run 2-3 rinse cycles (with no detergent) to flush it out.
  6. Check the dishwasher level. An unlevel machine can cause water to slosh over the tub edge and drip into the base. Adjust the front legs.
  7. Tilt and dry. Carefully tilt the dishwasher slightly backward to drain water from the base pan. Use towels to soak up remaining water. Let it air dry.
  8. Check hose connections. Inspect the fill hose and drain hose connections for loose fittings or drips.
  9. Restore power and test. If the base is dry and connections are tight, run a short cycle and watch for leaks.