The short answer
A leaking dishwasher is usually leaking for a reason an owner can see: a door seal, an overfilled tub from the wrong detergent, or a hose connection that has loosened. On a professional built-in cabinet the ranking below starts with those.
What you observe
- A leak only on certain cycles — A fill-level or suds problem rather than a split component.
- Water on the floor at the front of the machine — Usually the door seal or the door itself rather than a plumbing connection.
- NEAR MISS: a small puddle after the door is opened at the end — Condensate running off a hot door is normal on many machines.
Causes, most likely first on this appliance
- The machine is not level in its opening — A machine tilted forward carries water to the door rather than the sump, and the tub fills unevenly. Ranked first on DCS by Fisher & Paykel: these machines are integrated, levelled against a hard counter and plumbed behind a panel, so the installation carries more of the fault load than the machine does, and the parent-platform controls behave like their own family rather than like the styling on the front.
- The door alignment or the latch — A door that has dropped, or a latch that no longer pulls it tight, leaves a gap at one corner. Ranked second: it ranks here because the causes above it are free to check and this one is not.
- The door seal — A gasket that has hardened, torn or come out of its channel lets water past at the bottom corners first. Ranked third: it sits here because on a built-in unit it is a real cause, but reaching it means disturbing the installation.
- A split hose, a failed pump seal or a cracked tub — The causes that are left once the door, the detergent and the connections are clean. Ranked last: it is last because these components are built to a long service life, and because confirming one needs instruments and a service manual that are not owner tools.
Check in this order, and why
- Check the machine sits level front to back and side to side — A tilt forward explains water at the door on a machine with a perfect gasket.
- Close the door and look along the gap top to bottom — A gap wider at one end than the other is alignment rather than gasket.
- Run a finger all the way round the door gasket — Hardening, tears or a section standing out of its channel explains water at the front, and nothing else produces that pattern.
What an owner can safely check
- Level the machine in its opening — Adjust the feet until the machine sits level in both directions and the door closes squarely against the tub.
Tools: spirit level, adjustable wrenchAbout 30 min
- Check the latch pulls the door tight and the machine is level — Look at the gap along the closed door, check the latch engages fully and confirm the machine is level in its opening.
Tools: spirit levelAbout 20 min
- STOP HERE if the next step needs a meter on live terminals or a panel off — That is where an owner check ends and a service call begins.
Before you open anything
Safety
Switch the machine off at its breaker and shut its supply valve before working on any connection, and keep the power off while your hands are under the machine: water and an electrical appliance on the same floor is the hazard here rather than the leak itself. Water in the tub after a cycle can be hot enough to scald. Bail the tub before pulling the machine forward, because a full machine is heavy and the water ends up in the cabinet.
When to call a technician
Call once the door seal, the detergent, the levelling and every accessible connection have been checked and the leak persists, because what is left is behind the machine or inside it. Call immediately if water is reaching an outlet, if it is coming from under the machine faster than it can be mopped, or if it has already reached a neighbouring cabinet.
Nearest pages of this class
What this page does not cover
This page covers the DCS by Fisher & Paykel dishwasher as a class, not one model or production run. Any family- or model-specific page for your unit takes precedence over it. Not here: gasket and hose part numbers and the levelling specification for your specific installation.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
