The short answer
When a Black+Decker refrigerator does this, a leak on a repeating schedule is a defrost fault refilling the trough, not a drain that was cleared badly. Recognising the pattern is the owner contribution here; the defrost system itself is measured, not flushed.
What you actually see
- A puddle at the back only — Water behind the unit points at the drip tray or the supply connection rather than at the drain.
- Ice building on the freezer floor — A sheet of ice under the food is meltwater that froze before it could reach the drain.
- Wet insulation smell without visible water — Water trapped in the base pan produces a smell before it produces a puddle.
Causes, ranked for this refrigerator
- Frozen drain from a defrost fault — Leads the ranking — the pattern is a leak that returns days after every clear-out, which is the tell that the drain is not the root cause. Where this checks out clean, treat the next entry as the working theory rather than a possibility.
- Defrost drain blocked — Close behind — every cycle produces meltwater that has to leave through one small hole, and food debris or a plug of ice closes it regularly. A clean result here does not just remove one part; it removes everything that depends on it.
- Door seal letting humid air in — A step down — the giveaway is that the damp is always worst nearest the leak, which the paper test finds in minutes. It is worth being sure about this one rather than half-sure, since everything after it assumes a verdict.
What to check, in order
- First — the evaporator area for heavy frost — Empty the freezer section and look for a solid frost sheet on the rear panel rather than a light even coating.
- Second — the drain hole at the back of the compartment — Look for ice sitting in the trough that leads to the hole. Ice there means the hole below it is closed.
Checks an owner can do safely
- Step 1. Paper-test the door seal — Close the door on a sheet of paper every hand-width around the frame. Free-sliding paper marks where humid air is getting in.
Tools: sheet of paperAbout 10 min
- Step 2. Wipe and recheck the supply fittings — Dry every fitting at the back with a paper towel, then check each again after an hour. A weep shows as a fresh damp ring.
Tools: paper towelsAbout 15 min
- Step 3. Clear the defrost drain — Locate the small hole low on the rear wall inside and flush it with warm water from a baster or syringe until it runs freely.
Tools: turkey baster or syringe, warm waterAbout 20 min
Before you open anything
Safety
Water and power both come off first. Shut the valve, pull the plug, and only then move the appliance. A capacitor can hold a charge after the power is off, and a wet floor turns a small fault into a serious one.
When this becomes a service call
The line is not about confidence, it is about what the next step needs. A supply fitting that will not stop weeping after being checked, or a drain tube inside the cabinet foam, is beyond the owner side of this job.
Sources
General guidance- The Control of Hazardous Energy (Lockout/Tagout) — OSHA 1910.147 and manufacturer service manuals, fetched
- Refrigeration and Food Safety — USDA Food Safety and Inspection Service, fetched
Nearest pages
What this page does not cover
Read this as generalized information. It is accurate across the Black+Decker refrigerator range, which is exactly why it stops short of the detail a single family or model deserves. If a family-level or model-level page exists for your unit, that page supersedes this one on wiring, part numbers and error-code meanings; the links under Related pages are where those pages live.
Related pages
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
