The Hidden Cause: A Clogged or Frozen Defrost Drain
Modern refrigerators go through automatic defrost cycles to prevent frost buildup. During this process, the melted frost drains through a small tube, usually located at the back or bottom of the fridge, into a pan underneath where the water evaporates.
However, if that drain becomes clogged with food debris, ice, or mineral deposits, the water has nowhere to go. Instead of flowing into the pan, it backs up inside the refrigerator — eventually leaking out onto your kitchen floor.
This simple issue is easy to miss because it doesn’t cause an immediate, obvious malfunction. The fridge keeps running normally, but a few hours later, you’ll notice water pooling around it.
Other Common Reasons for a Leaking Refrigerator
While a blocked defrost drain is often the hidden reason, there are a few other causes worth checking:
- Damaged or Disconnected Water Line
If your fridge has a built-in ice maker or water dispenser, a cracked or loose water line can lead to leaks behind or beneath the unit. - Full or Cracked Drain Pan
The drain pan collects condensation, but if it’s full, cracked, or misaligned, it can spill water onto the floor. - Condensation from Poor Seals
If your refrigerator door gaskets are worn or not sealing properly, warm air can enter, causing excess condensation that may drip onto shelves and eventually leak out. - Improper Leveling
A fridge that isn’t level may prevent water from flowing properly into the drain pan. Check with a level and adjust the front legs if needed.
How to Fix a Clogged Defrost Drain
Here’s a quick step-by-step guide to clearing a blocked defrost drain:
- Unplug the refrigerator for safety.
- Locate the drain hole — usually found at the back or bottom of the freezer compartment.
- Flush it with hot water using a turkey baster or squeeze bottle to melt any ice and dislodge debris.
- Use a pipe cleaner or flexible brush to remove stubborn blockages.
- Dry the area and plug the fridge back in.
If the leak persists, you may need to remove panels or consult a technician, as there could be a deeper clog in the drain line.
