Start here
Before pulling the machine out, work out whether the water is coming from the front of the door or from beneath the kickboard — they are different pages of the same manual. A drip that appears only during the wash is a seal or a hose; a puddle that grows while the machine sits is a supply fitting. Two of the three commonest causes need no tools and no parts at all.
Where the water shows up
- Water inside the base tray when the kickboard comes off — Many of these have a tray with a float that stops the machine. Water there means a leak already happened somewhere above.
- Water appears only on the longest programme — Time and temperature both increase with programme length, so a marginal seal fails on the longest one first.
- Water only during the drain stage — Points at the drain hose, its clip, or the waste connection rather than at anything in the tub.
- The door does not sit flush along one edge — A machine that has settled out of level, or a hinge spring that has weakened, leaves a gap at the top corner.
- NEAR MISS — water inside the tub that will not go away — Standing water is a drainage fault, not a leak, and it has its own page for this family.
Ranked causes for these models
- Door gasket hardened, displaced or dirty — First on this roster. The gasket is a rubber part living in a hot, wet, greasy environment, and it takes a permanent set over the years so that it no longer springs back against the door.
- Overfoaming from too much or the wrong detergent — Second and the most commonly missed. Foam has a much lower surface tension than water, so it creeps past a seal that holds water perfectly, and washing-up liquid in a dishwasher will do it every time.
- Drain hose clip loose, or the hose split at a bend — Water only during the drain stage, and always at the back or under the kickboard. Vibration works the clip loose over years, and the hose fatigues where it is bent tightest.
- Inlet valve, supply fitting or tap leaking — Last by frequency and first by urgency. Mains water under pressure behind a built-in machine does not stop, and this is the cause that damages a kitchen rather than a cycle.
The diagnostic order for this family
- Lay paper towel across the floor and run a short cycle — Where the paper wets first tells you front or underneath, which is the split the rest of this page depends on.
- Note whether there is foam in the tub at the end — Foam means the detergent is the fault, not the seal. Run an empty cycle with no detergent to confirm.
- Check the supply fitting and the tap with the machine idle — Anything wet while the machine is doing nothing is mains water. Close the tap first and diagnose second.
Isolate first
Safety
Pull the plug, or trip the breaker if the machine is hard-wired, before a single screw comes out — and remember that a capacitor stays charged after the supply is gone. Wash water in one of these machines is hot enough to scald.
Models in the DFI family — This page covers the listings below and says so here, because it generalizes over all of them.
Reference| Model number | Family key |
|---|---|
| DFI663* | asco:dishwasher:dfi |
When this stops being owner work
Try the detergent and the level before calling anybody: between them they explain a large share of leaks at the door. Call when a clean, intact gasket on a level machine still lets water past, because at that point the seal itself has gone and it is a part rather than a clean.
The rest of this family
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
