The short answer
Water under one of these cabinets comes from one of three places, and telling them apart is a matter of where the water is rather than how much of it there is. The supply line and its fitting are behind the cabinet and produce a steady puddle that does not respond to anything done inside. Deal with a supply leak the same day. A drain blockage can wait a weekend. Anything specific to a single listing would belong on a model page; nothing below is.
How it presents
- The drain pan at the back is full or overflowing — Normal for the pan to hold water; not normal for it to overflow, which means more water than the airflow can evaporate.
- The floor is wet only on one side of the cabinet — Water following a slope rather than pointing at a source. Note where it is dry as well as where it is wet.
- A damp patch appears and dries between uses — Small volumes arriving on a defrost cycle. That timing points at the drain rather than at anything plumbed.
- Ice on the floor of the freezer under the drawer — The drain frozen a stage earlier: the water refroze before it could leave the compartment.
- NEAR MISS — the cabinet is also warm — Then the leak is secondary to an airflow problem and the cooling page for this family is where to start.
The ranking for this platform
- Defrost drain blocked with ice or debris — Top of the list and not close. The drain entry sits at the coldest point in the cabinet, so a slow drain becomes a frozen one, and a season of food debris finishes the job.
- Drain pan displaced, cracked or overfull — Second. The pan sits over the compressor to evaporate what the drain delivers, and a pan knocked out of position when the cabinet was last moved will spill everything it receives.
- Cabinet not level, tipping water the wrong way — The drain channel relies on gravity. A cabinet that leans forward sends condensate into the compartment instead of down the tube, and levelling it is a complete fix.
- Supply line, fitting or inlet valve leaking — Bottom by frequency and top by urgency. This is the only water on the page that is connected to a main, which means it does not stop when the cycle does.
Work by location, in this order
- Establish whether the water is inside the liner or on the floor — Inside means condensate and the drain; outside at the back means supply. This single observation halves the list.
- Check whether the water appears in step with the icemaker — Water that arrives shortly after a fill belongs to the icemaker path and not to the defrost path.
- Close the door on a strip of paper at several heights — Paper that slides out freely marks where the seal is not sealing, which is where the humid air is getting in.
Isolate first
Safety
Isolate the machine first: unplug it, or switch off its breaker where there is no reachable plug. A capacitor can hold a charge after the power is off, so isolation is the start of every job here and not a formality.
Models in the B family — This profile generalizes over every listing in the roster below, and stops where the roster stops.
Reference| Model number | Family key |
|---|---|
| B38A | atlas-homegoods:refrigerator:b |
| B48A | atlas-homegoods:refrigerator:b |
| B58A | atlas-homegoods:refrigerator:b |
When to call a technician
The owner line on this family is the drain channel. If flushing it from inside the cabinet does not clear it, the blockage is in the tube behind the liner and reaching it means the cabinet comes apart, which is service work on this roster.
Nearest pages of this class
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
