Why is my fridge leaking water onto the floor?

Finding a puddle under your fridge is annoying and a little worrying, especially on a wooden or tiled floor. The good news is that in most cases it is not a sign that the fridge is about to die. It is usually a drainage or water supply problem, and many of them are simple to fix.

1. A blocked defrost drain

This is the most common cause by far. A frost-free fridge periodically melts the frost off its evaporator. The meltwater runs down a small drain tube to a tray at the bottom of the fridge, where it evaporates. If the drain gets blocked by food particles, dirt or ice, the water backs up, overflows inside the fridge and runs out onto the floor.

Typical signs are water pooling at the back of the fridge or freezer compartment, ice forming at the bottom of the freezer, and water under the crisper drawers. To fix it, switch off the fridge, find the drain hole at the back of the compartment, and gently flush it with warm water using a syringe or turkey baster. Do not use hot water on plastic parts and do not poke anything sharp into the hole.

2. A cracked or overflowing drip tray

The tray under the fridge catches defrost water. If it cracks, shifts or is not seated properly, water ends up on the floor. In hot weather the tray can also overflow if the fridge is defrosting a lot, which hints at a deeper problem such as door gaskets that are not sealing and letting humid air in. Pull the tray out, check it for cracks and clean it.

3. A leaking water supply line

Fridges with an ice maker or a water dispenser connect to the home's water supply through a thin plastic or copper line. These lines can crack, loosen at the fittings or be pinched when the fridge is pushed back. A slow drip can go on for weeks, damaging your floor. If your fridge has a dispenser, look behind it for damp patches, wet flooring or mineral deposits on the connections. The inlet valve behind the fridge can also fail. Turn off the water supply to the fridge until it is repaired.

4. A faulty water filter or housing

Water filters need to be seated correctly and replaced on schedule. A filter that is cross-threaded, cracked or overdue for replacement can leak at the housing. If the leak starts shortly after changing the filter, reseat it.

5. Door seals and excess humidity

In Durban's humid summers, a worn door gasket lets moist air into the fridge. That moisture condenses on cold surfaces and runs down the walls, and it also builds extra frost that the defrost drain has to cope with. Check the seals for splits, mould or hardened sections, and try the paper test around the full door perimeter.

6. The fridge is not level

Fridges are designed to sit level or tilt slightly backwards so the doors close by themselves. If the fridge leans forward, drain water can run toward the front, and the door may not seal. Use a spirit level and adjust the feet.

How to find the source quickly

• Dry the floor, put a few paper towels under the fridge and see where the wetness appears first.
• Check inside the fridge and freezer for ice, water on the shelves and a blocked drain.
• Check behind the fridge for water line leaks and damp fittings.
• Look at the drip tray under the fridge.
• Check whether the water is clean (drain or supply) or smells off (food residue in the drain).

When to call a technician

If the drain keeps blocking, the water seems to come from the sealed system area, or you suspect a faulty inlet valve or heater, it is best to have it checked. A defrost heater failure can cause repeated ice and flooding, and a leaking water valve can cause real damage if left unattended. We repair household fridges across Durban and the surrounding suburbs, and we will find the leak on the first visit in most cases.