AE error — water leak
This step-by-step repair guide walks you through fixing ae error — water leak on your LG LDF7774ST. With the right tools and parts, most homeowners can complete this repair in 1–2 hours and avoid a costly service call.
Part of our Top 20 Dishwasher Models & Common Repair Issues Guide. Browse all dishwasher repair guides for related models and issues.
“`htmlCommon Symptoms & Causes
These symptoms typically indicate an AE error and active water leak issue on the LG LDF7774ST dishwasher.
- The dishwasher display shows the “AE” error code and stops mid-cycle
- Visible water pooling beneath or around the base of the dishwasher
- The dishwasher runs the drain pump continuously without completing a wash cycle
- A float switch inside the base pan has been triggered by accumulated water
This issue is most commonly caused by a worn door gasket, a cracked water inlet valve, a loose hose connection, or a damaged tub seal that allows water to drip into the drip pan over time.
“`Safety First
- Unplug the dishwasher from the power outlet before starting any repair — never work on a live appliance.
- Shut off the water supply valve before disconnecting any water lines or hoses.
- Wear work gloves when handling metal brackets, sheet metal edges, or sharp components.
- Take photos with your phone before disconnecting any wiring harnesses or connectors.
- Work in a well-lit area with enough floor space to lay removed panels flat.
Tools & Parts Needed
Essential Tools
- Phillips #2 screwdriver
- Torx T20 screwdriver
- Needle-nose pliers
- Multimeter
- Flashlight
Replacement Parts
Step-by-Step Repair Instructions
Step 1
Disconnect power at the breaker or by unplugging the unit before doing anything else, since you will be working near water and electrical components. Remove the kick plate by backing out the two Phillips screws at the bottom front of the machine, then look into the base pan — any standing water there confirms the AE error, which is triggered by a float switch that detects pan flooding. Do not skip the power disconnect; even a small amount of water in the base pan creates a shock hazard.
Step 2
Thoroughly dry the base pan using towels and a wet-dry vacuum, because the float switch will keep triggering the AE code as long as moisture is present. Locate the foam float switch in the front-left corner under the tub and manually press it down to reset it — if it is stuck in the raised position and won’t release, water has been sitting long enough to cause damage to the float mechanism and it may need replacement. Make sure the pan is completely dry before resetting, or the code will return immediately on the next cycle.
Step 3
With the pan dry, trace the source of the original leak by systematically inspecting four common failure points: the bottom door gasket for tears or gaps, the circulation pump base for a dark oily residue that indicates a failing seal, the water inlet fitting at the left rear for cracks or drips, and all drain hose clamp connections for looseness. A pro tip is to dry everything first and then run a short cycle while watching through the kick plate opening with a flashlight — this makes the active leak point much easier to pinpoint than inspecting dry components alone. Skipping this diagnostic step risks fixing the wrong component and having the error return.
Step 4
If the door gasket is torn, cracked, or no longer sealing flush against the tub, water will escape the wash cavity during the cycle and drain directly into the base pan. Remove the old gasket by peeling it out of its retaining channel around the tub opening, then press the new gasket firmly into the groove starting at the corners and working around each side to seat it evenly without gaps or folds. A misaligned gasket is one of the most common causes of recurring AE errors on this model, so take time to confirm the gasket sits fully seated in the channel all the way around.
Step 5
For all other leak sources found in Step 3, tighten any loose hose clamps or fitting connections firmly — hand-tight is not enough, use a screwdriver to snug clamps down without overtightening to the point of cracking plastic fittings. If the water inlet valve fitting is visibly cracked or weeping, the entire inlet valve assembly must be replaced rather than patched, since sealants are not reliable under the cycling water pressure inside a dishwasher. A pro tip is to replace any clamp that looks corroded or deformed at the same time, since a weakened clamp will fail again soon.
Step 6
Restore power, run a complete wash cycle, and watch the base pan through the kick plate opening with a flashlight for the first several minutes of the cycle to catch any active dripping immediately. At the end of the cycle, do a final inspection of the base pan — it should be completely dry with no new water present if the repair was successful. If water reappears, the AE code will trigger again and you will need to revisit Step 3 to identify a second or missed leak source.
Where to Buy Replacement Parts
Find genuine OEM and aftermarket replacement parts for your LG LDF7774ST on Amazon:
- LG LDF7774ST float switch AJU35084701 replacement
- LG dishwasher door gasket MDS62052001 replacement
- LG dishwasher leak source detection base pan
When to Call a Professional
If the issue persists after completing all steps above, the problem may involve the sealed refrigerant system, a failed main control board, or wiring that requires specialized diagnostic equipment. Contact a licensed appliance technician — attempting sealed-system repairs without EPA 608 certification is illegal and unsafe.
“`htmlHow Much Does This Repair Cost?
DIY parts for fixing an AE error water leak on the LG LDF7774ST typically cost between $10–$75, depending on whether you’re replacing a door gasket, inlet valve, or hose. A professional service call for the same repair usually runs $150–$300 including labor. Tackling this repair yourself can save you $100 or more.
“`Frequently Asked Questions
What does the AE error code mean on my LG LDF7774ST?
The AE error code indicates that the dishwasher’s leak sensor has detected water in the base pan beneath the unit. This triggers an automatic shutoff to prevent further water damage to your floor.
Is it safe to run my LG LDF7774ST while it’s showing an AE error?
No, you should not run the dishwasher until the leak is identified and repaired. Continuing to operate it could cause electrical hazards or significant water damage.
How do I reset the AE error code after fixing the leak?
After repairing the leak and drying out the base pan, unplug the dishwasher for 10–15 minutes and then restore power. The error should clear once the moisture sensor registers no remaining water.