The short answer
On a LG dishwasher, water at the door during or after a cycle usually comes down to water in the base pan tripping the leak float rather than anything deeper in the machine: once the float lifts, the machine latches into a protective state and runs its drain pump instead of starting a cycle. That keeps it an owner check first, not a service call. Start here: read the code on the panel first, because LG separates the motor inverter from the main board and the code tells you which one you are looking at.
What you are seeing
- A damp patch on the floor at one corner of the door
- Steam escaping from one side of the door during the cycle
- A gasket that feels hard and stays flattened where the door presses it
- Not this fault: Water appearing under the middle of the machine with a dry door, which is a sump or hose leak
- Not this fault: A puddle only after the sink is used, which is a drain-hose problem
- Body: LG builds this dishwasher as a direct-drive brushless wash motor with its own inverter board separate from the main board, a base-pan leak sensor and a single-piece door gasket with a lower door seal. That architecture decides which of these you see first.
- Also check note: If these fit better, the fault is a different one.
Likely causes, in order
- Water in the base pan tripping the leak float — Why this rank: The LG leak sensor floats in the base pan and latches the machine into a continuous drain, which owners hear as a pump that never stops.
- A hardened or displaced door gasket — Why this rank: The LG single-piece gasket is pushed into a channel and pulls out at the top corners first.
- A door out of alignment — Why this rank: A door hanging low or proud loads one part of the gasket and leaves the rest untouched.
- A worn door latch — Why this rank: The latch has to report closed before anything happens.
- A failed sump or pump seal — Why this rank: A leak from under the tub reaches the floor without ever appearing at the door.
- Body: Ranked for a LG dishwasher specifically.
What to check, in order
- Body: The order follows the ranking, and the ranking follows the platform. First: listen for a drain pump running with nothing selected. It goes first because the LG leak sensor floats in the base pan and latches the machine into a continuous drain, which owners hear as a pump that never stops. Second: wipe the gasket dry and close the door on a strip of paper at each corner. With the first check clean, this is what the LG platform makes next most likely. Third: look at the gap around the door with it closed and compare the four corners. Only after those three is it worth reaching for a worn door latch: it costs more to get at, and it does not explain the first three coming back clean.
Checks you can make
- Note the exact code the panel shows before you cancel it, then cancel and run a short cycle to see whether it returns at the same point. A code that returns at the same stage is a component, not a glitch. — Tools: none — Time: about thirty minutes
- Wipe the gasket dry, close the door on a strip of paper at each corner and at the mid-point of each side, and pull each strip out. Note which pull free easily. — Tools: paper strip, cloth — Time: about ten minutes
- Unthread the filter cylinder, lift out the fine screen behind it and rinse both under a tap until light passes through the mesh evenly. — Tools: none — Time: about ten minutes
- Clean the whole gasket and its channel with warm soapy water and a cloth, working grit out of the seal face, then dry it and check whether it springs back when pressed. — Tools: cloth, warm soapy water — Time: about fifteen minutes
- Body: Stop at the first step that would need a meter on live terminals or a sealed assembly opened.
Before you open anything
Safety
Switch the machine off at its breaker, or unplug it, before removing any panel. Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. Work with the floor dry and stand on something dry. Water on the floor is part of the electrical hazard, not separate from it.
When to call
The line is not difficulty, it is what the next step costs and risks. Call when: the gasket has been replaced or reseated and the leak returns at the same corner
Nearest pages
What this page omits
This is generalized information: it ranks causes for the LG dishwasher range as one platform, not for a single model. Where a page exists for your specific model it is the more specific one and takes precedence over this. The narrower pages below cover the other presentations of this symptom.
Entries: - [LG Dishwasher: Does Not Clean or Dry](/blog/lg-dishwasher-cleaning-performance) - [LG Dishwasher: Cycle Will Not Run or Complete](/blog/lg-dishwasher-cycle-fault) - [LG Dishwasher: Not Heating](/blog/lg-dishwasher-heating-failure)
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
