The short answer for these models
Almost all refrigerator water is water the machine made on purpose and then failed to get rid of. Defrost melt is supposed to run down a channel, through a drain and into a tray over the compressor, and a blockage anywhere along that path puts it on your floor instead. A genuine supply leak is rare and it looks different. What changes on the BUC models is the sequence rather than the diagnosis. A glazed door leaks far more heat than a solid one by design, so the same fault reads as more severe on a glass-door unit and the baseline you are judging against has to change with it, which is why the door and glazing checks belong at the top of the list here.
What you actually see
- How your BUC unit is built — the check that comes before the list — Look at the door itself. Glass sheds far more heat than a solid panel, so longer running, some sweating and a warmer shelf by the door are the baseline rather than the fault.
- Water collecting under the crisper or in the base of the cabinet — That is the classic blocked drain: melt water backing up at the lowest point inside rather than running away.
- Condensation running down the inside walls — Beads and runs down the inside walls, which is air getting in rather than water failing to get out.
Causes, most likely first on this family
- The cabinet is not level, or the drain channel is not sloping — On the list because water goes where gravity sends it, and a cabinet tipped the wrong way sends it over the sill. On a BUC unit this rises to the top of the order, because the identification step above changes what it proves — so the door and glazing 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 — It comes last because it is the least likely and because a real supply leak is usually obvious the moment you look behind the cabinet.
What to check first, and why that order
- First — find the drain hole and test it — It sits at the lowest point of the cold compartment, usually behind or under the bottom shelf. Pour a little warm water in and watch whether it goes. 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.
- Second — check the cabinet is level and tipped very slightly back — A unit tipped forward will send its melt water over the sill no matter how clear the drain is.
Before you open anything
Safety
Cut the power first; a capacitor can hold a charge after the power is off. Turn off the supply valve too if the unit is plumbed, so nothing refills while you have a connection open. Clear the water before you start, and keep the plug and any socket well away from it.
Where the owner job ends
Call once the drain, the seal, the tray and the levelling are all accounted for, or the moment you find water coming from a supply line rather than from melt. Call immediately if water is reaching an electrical connection or a neighbouring appliance: at that point the leak stops being a nuisance and becomes a hazard.
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.
