A puddle on the kitchen floor is hard to ignore. You mop it up. It comes back. Now you need to figure out where it's actually coming from before it warps your floor or soaks your cabinets.
Good news: the location of the water tells you most of what you need to know. Work through these five causes in order. Most take under a minute to check.
1. Defrost Drain Blockage (Most Common)
Start here. This is the cause behind the majority of fridge leaks.
Your fridge runs defrost cycles automatically — usually once or twice a day. Melted frost drains through a small channel at the back of the freezer compartment, down into a drain tube, and out to the condensate pan underneath the unit. When that channel or tube gets blocked — usually by ice buildup or food debris — water backs up and spills onto your floor instead.
Where to look: Water pooling at the front center of the fridge, sometimes appearing to come from under the crisper drawers. You might also see ice buildup on the freezer floor near the back wall.
What you can do: Pull everything out of the freezer. Look for a small drain hole at the back floor of the compartment. If it's blocked with ice, pour a cup of hot (not boiling) water directly into it to clear the obstruction. This fixes the leak in many cases.
If the drain refreezes within a day or two, the defrost heater may be failing. That's a tech call.
2. Water Line Leak
If your fridge has a water dispenser or ice maker, it's connected to your home's water supply via a plastic or braided line running to the back of the unit.
Where to look: Water directly behind the fridge, along the baseboard, or pooling from the wall side. Pull the fridge away from the wall and inspect the line where it connects to the back of the unit and where it connects to the shutoff valve at the wall.
What you can do: Check for kinks, cracks, or loose fittings. If the compression fitting at the fridge connection is loose, hand-tighten it. If the line itself is cracked or brittle — common with older plastic lines — it needs replacing. If you're not comfortable with the shutoff valve, call a tech.
3. Ice Maker Supply Line
Related to the above, but worth separating. The internal supply line running from the back inlet to the ice maker inside the fridge can develop micro-cracks or loose joints over time — especially on plastic fittings that expand and contract with temperature changes.
Where to look: Water inside the fridge cabinet, sometimes in the back upper corner near the ice maker. Or a slow drip that only appears when the ice maker cycles.
What you can do: Visually inspect the line inside the unit if you can access it. If it's actively dripping, the ice maker valve or internal tubing has failed. This one almost always requires a tech — replacing internal water valves involves pulling the fridge and disconnecting the supply.
4. Condensate Pan Crack
The condensate pan sits underneath your fridge, near the compressor. It collects moisture from the defrost cycle and evaporates it using heat from the compressor. If the pan cracks — or if the fridge isn't level and the pan overflows — water shows up at the front or sides of the unit.
Where to look: Water at the very front of the fridge, under the toe-kick panel. It may only appear after the fridge has been running for a while.
What you can do: Pull the lower back panel or grille to access the pan. If it's cracked, the pan needs replacing. If it's full but intact, check the fridge's leveling — the front should tilt back very slightly so condensate flows toward the pan. A replacement pan is inexpensive and usually a DIY job.
5. Door Seal Failure
A worn or torn door gasket lets warm, humid air inside the fridge. That moisture condenses on cold surfaces and eventually works its way to the floor — usually as a slow, intermittent drip.
Where to look: Condensation inside the fridge, frost in unusual spots, or a slow drip from the bottom front edge. Run your hand along the gasket. Feel for gaps, tears, or sections that have gone stiff and lost their grip on the door frame.
What you can do: Clean the gasket with warm soapy water — dirt buildup is often the culprit. If it's torn or no longer seals, gaskets are model-specific but generally replaceable. A dollar-bill test helps: close the door on a bill. If it slides out without resistance, the seal is gone.
When to Call a Tech
Check these five things first. Most leaks — a blocked drain, a loose fitting, a cracked pan — resolve without a service call.
Call a tech when:
- The defrost drain keeps refreezing after you've cleared it
- The ice maker supply valve is actively leaking inside the unit
- You see water and the fridge is also not cooling properly
- You can't identify the source after working through this list
Water on the floor usually has a simple answer. Find the source first. Then decide what comes next.
We work on all major brands — Sub-Zero, LG, Samsung, GE, Whirlpool, and more — across Miami-Dade and Broward. Call 786-869-3888 if you need us today.