The short answer
Nearly all refrigerator leaks are the defrost drain rather than the water supply. Water under the crisper drawers or a sheet of ice on the freezer floor are the same fault seen from two sides, and clearing the drain is the fix.
What you actually see and hear
- Water pooling under the crisper drawers — The defrost drain is blocked and melt water is running into the cabinet instead of out of it.
- A layer of ice on the freezer floor, often under the drawer — The same blockage, seen from the freezer side, with the water freezing before it drains.
- Water on the floor at the front — Usually the same drain overflowing forward, or a full or cracked drip pan behind.
- Water at the back only on units with a plumbed supply — The supply line fitting or the inlet valve, which is a different and much wetter fault.
- NEAR MISS - beads of water on the inside walls — Condensation from door openings in a humid room, not a leak.
Causes, most likely first on this machine
- Blocked defrost drain — First and by a very wide margin. It is narrow, it is at the back of the freezer floor, and it blocks with debris or an ice plug.
- Drip pan full, displaced or cracked — Second. It lives under the cabinet on the compressor pan and is knocked out of place whenever the unit is moved.
- Water supply fitting or inlet valve — Third, and only on plumbed cabinets, but it is the one that can flood a kitchen rather than dampen a drawer.
- Door seal letting humid air in — Fourth. It produces condensation and, in a humid room, enough of it to look like a leak.
- Cabinet not level — Fifth. A cabinet leaning forward sends both melt water and condensate the wrong way.
- Ice maker fill overshoot — Last, and it shows as ice in the bin and around the mould rather than as clean water.
Check in this order, and why
- Look on the freezer floor for ice before you look anywhere else — Ice there is the drain, and it explains water in the fridge at the same time.
- Empty the crisper drawers and look at the trough behind them — This is where a blocked drain delivers its water.
- Pull the cabinet out and check the drip pan — Full, cracked or knocked sideways are all common.
- If the cabinet is plumbed, dry the fitting and check it with a tissue — This is the only cause on the list that gets worse quickly.
What an owner can safely check
- Empty the drawers and mop the water out — Do it first so you can see whether it returns and how fast.
Tools: towels, spongeAbout 15 min
- Clear the defrost drain from the freezer side with warm water — Use a turkey baster or a soft tube. Never a metal probe near the liner.
Tools: turkey baster, warm waterAbout 30 min
- Pull the cabinet out, empty the drip pan and reseat it square — Check it for cracks while it is out.
Tools: towel, shallow trayAbout 20 min
- Level the cabinet with a slight backward tilt — It helps the drain, the doors and the seals all at once.
Tools: spirit levelAbout 20 min
- Dry the supply fitting and check it with a tissue after an hour — On a plumbed cabinet this is the leak that matters most.
Tools: tissueAbout 10 min
- STOP HERE before removing the freezer rear panel to reach a frozen drain — Live terminals and the defrost heater are behind it.
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. The defrost heater and the compressor circuit are both live behind the rear and lower panels, and a capacitor can hold a charge after the power is off. Never use a heat gun or a naked flame to clear frost from an evaporator, and never chip at frost with anything metal near the tubing.
When to call a technician
Call when the drain will not clear from the freezer side, because the blockage is then behind the rear panel where the heater and live terminals are. Call promptly on a plumbed cabinet if the leak is at the supply fitting - that is mains pressure and it does not stay small. Clearing a drain, emptying a pan and levelling a cabinet are all owner jobs, and between them they account for most of the water anyone ever finds under a refrigerator.
Nearest pages of this class
What this page does not cover
This page is written for the full-size frost-free refrigerator class, not for one family or model line. Where a brand- or model-specific page exists for your unit it is the more specific answer and it is linked above, so go there first if your machine is named. What is deliberately not here: fan and defrost part numbers, thermistor resistance values, refrigerant charge and shelf dimensions, all of which differ by family and belong on the page for that family.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
