The short answer
On a Samsung 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: look for water in the base pan, because a Samsung latches its leak state and will keep the drain pump running until the pan is dry.
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: Samsung builds this dishwasher as a stainless tub with the leak sensor in the sump and a float in the base pan, and a door sealed by side gaskets plus a separate sump-lip gasket rather than one continuous loop. 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: A Samsung latches on its base-pan float and runs the drain pump continuously, which is why owners describe it as running forever rather than as a leak.
- A failed sump or pump seal — Why this rank: The Samsung sump-lip gasket is a separate part from the side gaskets, so the door can look perfect while the leak comes from under the tub.
- A hardened or displaced door gasket — Why this rank: The two-part Samsung gasket lets one side harden while the other stays sound.
- 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.
- Body: Ranked for a Samsung 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 a Samsung latches on its base-pan float and runs the drain pump continuously, which is why owners describe it as running forever rather than as a leak. Second: dry under the machine, run a cycle and look for a damp line at the front underside. With the first check clean, this is what the Samsung platform makes next most likely. Third: wipe the gasket dry and close the door on a strip of paper at each corner. Only after those three is it worth reaching for a door out of alignment: it costs more to get at, and it does not explain the first three coming back clean.
Checks you can make
- Tip the machine gently back onto its rear feet and look into the base pan with a flashlight. Standing water there means the float has been tripped and explains a machine that will not start a cycle. — Tools: flashlight, towel — Time: about ten 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
- Wipe the sump lip and the lower door gasket dry, run a short cycle and stop it at the wash stage. A wet lower corner with dry sides isolates the fault to one gasket section. — Tools: paper towel — Time: about twenty 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 water is reaching the junction box or the floor under the cabinet
Nearest pages
What this page omits
This is generalized information: it ranks causes for the Samsung 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: - [Samsung Dishwasher: Controls, Display or Error Code](/blog/samsung-dishwasher-control-fault) - [Samsung Dishwasher: Abnormal Noise or Vibration](/blog/samsung-dishwasher-abnormal-noise) - [Samsung Dishwasher: Electrical, Fire or Gas Hazard](/blog/samsung-dishwasher-electrical-safety)
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
