The short answer for these models
The water is nearly always condensate that has lost its way. A clogged drain hole, a cracked or displaced tray, or humid air condensing on a door that does not seal will all put water where you are finding it. Check the path before suspecting a pipe. Where this departs from the brand-level page is the ranking. A built-under cabinet has to shed its heat through one small grille, so anything that restricts that grille shows up as a fault long before it would on a freestanding unit, so on a BUF unit the clearance and condenser checks lead.
What you actually see
- The BUF form you own, which changes what the rest of this list means — Check whether the unit sits in a cut-out. If it does, its heat leaves through one grille, and that grille outranks everything inside the machine.
- A puddle on the floor at the front — Water that has run forward over the door sill, usually from an overfilled channel or an overflowing tray.
- A puddle at the back or under the middle — Look at the tray over the compressor first: a cracked or displaced tray puts water straight onto the floor.
Causes, most likely first on this family
- The cabinet is not level, or the drain channel is not sloping — Water only runs where gravity sends it. A cabinet tipped forward sends melt over the sill instead of down the channel. On a BUF unit this rises to the top of the order, because the identification step above changes what it proves — so the clearance and condenser checks answer more in five minutes than the rest of the list answers in an hour.
- The supply line, the fill valve or an internal joint — Last, and only on plumbed units: a genuine water-supply leak is rare and it is continuous rather than cyclical.
What to check first, and why that order
- First — find the drain hole and test it — Find the hole at the lowest point inside and pour a little warm water into it. Water that stands there rather than vanishing has answered the question.
- Second — shut the door on a strip of paper — The paper test takes a minute and it separates a condensation problem from a drainage one. On these models this is the step the construction changes: what you found at the step above decides how much weight to give what you find here.
Before you open anything
Safety
Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. Water and electricity share this cabinet, so dry the floor before you kneel on it and never work on a live machine standing in a puddle. Where a supply line is fitted, shut its valve before you disturb anything behind the cabinet.
Where the owner job ends
Book the visit once the drain, the seal, the tray and the levelling are all clear and water keeps returning, because the rest of the path runs behind the lining. Call at once if water is reaching a socket or a neighbouring appliance — at that point it has stopped being a housekeeping problem.
The other symptoms covered for 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.
