My Fridge Is Leaking Water Inside — Here’s What To Do
You open the fridge and there’s water inside. Not a lot — but enough to be annoying. Maybe it’s pooling at the bottom. Maybe it’s dripping from somewhere above. Maybe you’ve mopped it up twice this week and it keeps coming back.
Here’s the thing most people get wrong: they assume the fridge has a major fault and start looking at replacements. In reality, water inside a fridge is usually a drainage problem, not a cooling problem. The fridge is working. It’s producing condensation as it should. The water just isn’t going where it’s supposed to.
The good news is that the most common cause — a blocked defrost drain — is free to fix. And even the more expensive causes are usually well under the cost of a new fridge.
This page covers the common causes, the symptoms to look for, and the checks you can perform yourself. If you need the complete diagnostic sequence for determining which of the seven leak faults is causing yours, the full guide is linked at the bottom.
Quick Diagnosis
Water pooling at the bottom of the fridge: a blocked defrost drain. The most common cause, and free to fix.
Water dripping from above: a blocked defrost drain in the freezer, or a blocked drain tube.
Water running down the back wall: excessive condensation from a damaged door seal, or a blocked drain tube.
Water only after the defrost cycle: a blocked or frozen defrost drain tube.
Water near the ice maker or dispenser: a water supply line leak.
Water under the crisper drawers: a blocked drain that’s overflowing, or a cracked drain pan.
Water with frost buildup in the freezer: a defrost system fault.
Why Your Fridge Is Leaking Water Inside
A refrigerator produces condensation constantly. Every time you open the door, warm air enters and moisture condenses on the cold surfaces. The defrost cycle melts frost off the evaporator coil, producing meltwater.
All of that water drains through a channel at the back of the fridge, down a tube, and into a drain pan at the bottom of the unit. The pan is warm (heated by the compressor) and the water evaporates.
If any part of that path is blocked, damaged, or misaligned, water ends up inside the fridge instead of in the pan. That’s the source of almost every “leaking water inside” fault.
Common Causes
Blocked Defrost Drain
The most common cause. The defrost drain is a small hole at the back of the fridge, usually below the evaporator coil. Food debris, ice, or mould blocks it.
When the drain is blocked, meltwater backs up and overflows into the fridge compartment. This is the first thing to check, and it’s free to fix.
Clogged or Frozen Drain Tube
The drain tube carries water from the drain hole to the drain pan. It can clog with debris or freeze in cold conditions.
A frozen drain tube is common in fridges where the freezer temperature is set too low, or where the tube runs through a cold section of the cabinet.
Damaged or Misaligned Door Seal
A damaged, worn, or misaligned door seal lets warm air into the fridge continuously. More warm air means more condensation, and more water than the drain can handle.
This is often the underlying cause when the drain appears to be working but water still accumulates.
Blocked Air Vents
Fridges circulate air through vents between the freezer and fridge compartments. If those vents are blocked by food, airflow stops, and condensation builds up in the wrong places.
Water Supply Line Leak
If your fridge has a water dispenser or ice maker, the supply line runs through the cabinet. A loose connection, a cracked line, or a failed inlet valve can leak water inside the fridge.
Cracked Drain Pan or Internal Duct
The drain pan, or the internal duct that carries water to it, can crack with age. A cracked component leaks water into the cabinet instead of directing it to the drain.
Defrost System Fault
If the defrost heater, thermostat, or timer fails, frost builds up on the evaporator coil. When it finally melts, the volume of water is more than the drain can handle, and it overflows.
If You Have A Fridge Freezer Combo
Most of this page applies to any fridge. But if you have a fridge freezer — the two-door combo with the freezer on top or bottom — the leak is usually coming from one specific place, and it’s worth knowing why.
On a combo unit, the fridge and freezer share a single cooling system and, in most models, a single defrost drain. The freezer defrosts several times a day, and the meltwater runs down a shared channel to the drain pan. When that drain blocks, the water doesn’t just stay in the freezer — it overflows into the fridge compartment, usually down the back wall or under the crisper drawers.
Where the water shows up on a combo:
Down the back wall of the fridge: the shared defrost drain is blocked. Meltwater is backing up and overflowing into the fridge.
Under the crisper drawers: the drain channel is overflowing, and the water is following the lowest path.
At the bottom of the fridge, near the door: a blocked drain combined with a door seal that isn’t sealing, letting warm air in and increasing frost.
At the back of the freezer: the drain hole itself is blocked with ice or debris.
What’s different about checking a combo:
Two door seals, not one. Check both the fridge and freezer seals — either can let warm air in.
One shared drain. Clear it from the freezer side, where the drain hole sits, then confirm it flows through to the pan.
The drain channel in the fridge can also collect water and debris. Check it as well as the freezer drain.
The most common combo-unit cause is the shared defrost drain blocking. It’s free to clear, and it resolves the majority of combo leaks. If the drain is clear and the water continues, work through the diagnosis steps below.
How to Diagnose the Leak
Step 1 — Find Where the Water Is Appearing
Before checking anything, work out where the water is coming from:
Bottom of the fridge — blocked defrost drain or drain tube
Ceiling of the fridge — blocked defrost drain, or warm air from a damaged door seal
Back wall of the fridge — excessive condensation from a damaged door seal, or a blocked drain tube
Near the ice maker or dispenser — water supply line leak
Under the crisper drawers — cracked drain pan or blocked drain
That single observation narrows the fault to two or three causes.
Step 2 — Check the Defrost Drain
Unplug the fridge. Locate the defrost drain at the back of the fridge compartment.
Look for debris, ice, or mould blocking the hole. If the drain is visibly blocked, that’s your fault.
Step 3 — Clear the Defrost Drain
Clear the drain with a pipe cleaner, a turkey baster, or a length of flexible wire. Work it gently into the hole to break up any debris.
Flush the drain with warm water to confirm it’s flowing. If the water drains freely, the fault is fixed.
Step 4 — Check the Drain Tube
If the drain hole is clear but water still accumulates, the drain tube is the fault. Follow the tube from the drain hole to the drain pan at the bottom of the fridge.
Check for kinks, blockages, or freezing. If the tube is frozen, thaw it with warm water. If it’s clogged, clear it.
Step 5 — Check the Door Seal
Run a dollar bill around the door seal. Close the door on the bill and pull it out. If it slides out with no drag, the seal isn’t sealing at that point.
Check the seal for cracks, tears, or deformation. Clean it with warm soapy water and check again. If it’s damaged, it needs replacing.
Step 6 — Check the Air Vents
Look inside the fridge and freezer for the air vents between compartments. Confirm they’re not blocked by food packaging.
If they are, rearrange the contents and give the fridge a day to stabilise.
Step 7 — Check the Water Supply Line
If your fridge has a water dispenser or ice maker, trace the supply line from the back of the fridge to the dispenser and ice maker.
Look for loose connections, cracks, or kinks. Tighten any loose fittings. If the line is cracked, it needs replacing.
Step 8 — Check the Drain Pan and Internal Duct
The drain pan is at the bottom of the fridge, usually behind a kick plate. Pull it out and inspect it for cracks.
The internal duct that carries water from the drain to the pan can also crack. Check it visually for damage.
Step 9 — Check the Defrost System
If frost is building up in the freezer and melting in large volumes, the defrost system is the fault.
Check the defrost heater, thermostat, and timer for continuity. A failed component needs replacing.
Repair Cost Guide
| Component | DIY Part Cost | Professional Fitted |
|---|---|---|
| Defrost drain cleaning | $0 | $100 to $200 |
| Drain tube replacement | $10 to $30 | $100 to $200 |
| Door seal replacement | $30 to $80 | $150 to $300 |
| Water supply line | $10 to $30 | $100 to $200 |
| Drain pan | $20 to $60 | $150 to $250 |
| Defrost heater or thermostat | $30 to $80 | $200 to $400 |
When to Repair vs Bin
Repair if:
The fault is a blocked drain, drain tube, door seal, or water supply line
The fridge is under eight years old
The repair cost is under half the cost of a new fridge
The fridge has no other faults
Bin if:
The fault is a cracked internal duct
The fault is a sealed system problem
The fridge is over 12 years old and has multiple faults
The repair cost exceeds half the cost of a new fridge
Safety Warning
Electrical risk. Refrigerators run on mains voltage. Unplug the appliance before removing any panel or accessing any component.
Water risk. If your fridge has a water supply line, shut off the water supply before disconnecting any line. Have towels ready.
Mould risk. A slow water leak inside the fridge can cause mould growth behind the panels. If you smell mustiness or see discolouration, investigate the source.
Slip risk. Water on the floor around the fridge is a slip hazard. Clean it up immediately.
FAQ
Why is my fridge leaking water inside?
The most common cause is a blocked defrost drain. Meltwater from the defrost cycle can’t drain away, so it pools inside the fridge compartment.
Why is water pooling at the bottom of my fridge?
This points to a blocked defrost drain. Clear the drain and flush it with warm water.
Why does my fridge leak water only after the defrost cycle?
This confirms the fault is the defrost drain or drain tube. If the drain were working, the meltwater would flow out without appearing inside the fridge.
Can a bad door seal cause water inside the fridge?
Yes. A damaged door seal lets warm air in continuously. More warm air means more condensation, and more water than the drain can handle.
How do I clear a blocked defrost drain?
Unplug the fridge. Locate the drain at the back of the fridge compartment. Clear it with a pipe cleaner or a length of flexible wire. Flush it with warm water to confirm it’s flowing.
Is it worth repairing a fridge that’s leaking water inside?
Usually yes. Most leaks are caused by a blocked drain, which is free to fix. A damaged door seal or drain tube is $10 to $80 for the part. Only a cracked internal duct or a sealed system fault justifies replacing the fridge.
Get the Complete Diagnosis
Need to determine exactly which of the seven faults is causing your leak?
The complete diagnostic guide takes you beyond the basic checks and walks through all seven fault patterns step by step.
The complete guide includes:
Symptom-based diagnostic flowchart
Blocked defrost drain diagnosis and clearing
Clogged or frozen drain tube diagnosis
Damaged or misaligned door seal testing
Blocked air vents and condensation diagnosis
Water supply line and ice maker leak detection
Cracked drain pan, tray, and internal duct inspection
Defrost system fault diagnosis
Repair and replacement considerations
Repair-or-bin guidance
Fridge Leaking Water Inside Repair Guide
Complete diagnostic guide for refrigerators leaking water inside.
What’s included:
Seven detailed fault diagnoses
Step-by-step troubleshooting
Repair-or-bin guidance
Required checks and tools
Repair information
Replacement considerations
Download instantly
$3.95
[GET THE COMPLETE REPAIR GUIDE]
Have More Than One Refrigerator Problem?
If you’re dealing with several problems rather than just a leak, the Refrigerator Ice Maker Not Working guide covers the most common ice maker faults in one reference.
$7.95
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Our brand guides cover washers, dryers, and dishwashers from Fisher & Paykel, Samsung, LG, Bosch, Whirlpool, Maytag, GE, and Miele.
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Repair or Bin?
Before spending money on a repair, find out what is actually wrong with your appliance.
Repair or Bin gives you the information to diagnose the problem and make an informed repair-or-bin decision.
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