Why is my refrigerator leaking water?
Updated August 2026
A puddle that keeps returning under or in front of the refrigerator is most often a clogged defrost drain, which lets frost meltwater back up and spill over the pan instead of running to the evaporator tray. Flushing that little drain with warm water is free and fixes it in most cases. If the drain is clear, the water is coming from the ice-maker or dispenser supply line, an unlevel cabinet, or the filter housing, each covered below.
Safety first: refrigerator leaks are a top cause of hidden kitchen floor rot, because the water runs under the cabinet where you never see it. If the flooring in front feels spongy or the vinyl is lifting, the subfloor may already be damaged, a $500 to $2,500 repair. Water pooling near the cord or the wall outlet is also a shock risk, so unplug the unit before you pull it out and mop underneath, and dry the area fully to keep mold from taking hold.
Causes, most likely first
| Cause | How likely | The fix | Typical cost |
|---|---|---|---|
| Clogged defrost drain | Most common | Clear the drain hole in the freezer floor or back wall with warm water and a turkey baster or pipe cleaner so meltwater flows to the pan. | Free |
| Cracked or kinked supply line | Common | The 1/4-inch plastic water line to the ice maker or door dispenser splits or loosens at a fitting. Replace the line or tighten the nut. | $10–40 |
| Refrigerator not level | Common | A unit tipped forward drains condensation toward the door. Adjust the front leveling feet so it tilts slightly back. | Free |
| Leaking water-filter housing | Occasional | A cross-threaded or old filter cartridge weeps at the head. Reseat it or swap in a fresh filter. | $30–60 |
| Overflowing or cracked drain pan | Rare | The evaporator pan under the unit cracks, or it overflows when the drain is fully blocked. Replace the pan. | $40–150 |
Check these first
- Pull the refrigerator away from the wall and look at the drain pan underneath and the floor behind it for the wet trail.
- Open the freezer and check for a sheet of ice on the bottom, a sign the defrost drain is clogged and backing up.
- Trace the plastic water line from the wall valve to the fridge, feeling every fitting for drips.
- Set a level on top of the unit. It should tilt slightly toward the back so the doors self-close and water drains rearward.
- Twist the water filter a quarter turn to reseat it, and check the date; a filter older than six months can weep.
Prevent it next time
The defrost drain and the water line cause most fridge leaks, and both respond to a simple twice-a-year check. When you clean the door gasket, also flush the defrost drain and eyeball the supply line for kinks or drips. Change the water filter every six months so the housing seal stays fresh. Keeping the refrigerator maintenance basics on a schedule, including a coil cleaning, prevents the frost buildup that clogs the drain in the first place. A unit past its 13-year average life that leaks repeatedly may be nearing replacement.
When to call a pro
Call an appliance tech when the leak is not the drain or the water line, when the defrost drain reclogs within weeks (a sign the defrost heater or thermostat has failed), or when you find water inside the sealed system. A service visit runs $90–150, with a water-inlet valve or defrost repair adding $150–350. If the fridge is over 12 to 15 years old and leaking on top of other faults, price a new unit before sinking money into it.
Most of the causes above are maintenance problems wearing a disguise. OnOtto keeps the boring prevention on schedule so the 2 a.m. version doesn't happen.
Stop chasing symptoms, free for 30 daysFrequently asked questions
Why is there ice building up on the bottom of my freezer?
A sheet of ice on the freezer floor is the classic sign of a clogged defrost drain. During each defrost cycle, frost on the coils melts and is supposed to run down a small drain to a pan underneath. When food debris or ice plugs that drain, the meltwater freezes into a growing slab, then eventually overflows onto the floor. Clear the drain with warm water and a baster, and the ice and the puddle both stop coming back.
Is water leaking from my fridge dangerous?
The water itself is clean, but the damage it causes is the real problem. A slow leak soaks the subfloor and cabinet base, feeding mold and rotting the material over weeks, and a puddle near the power cord or outlet is a genuine shock hazard. Unplug the refrigerator before you reach underneath, dry everything thoroughly, and address the source quickly. Catching it early turns a free drain flush into the whole fix instead of a floor repair running into the thousands.
How do I flush a clogged refrigerator defrost drain?
Empty the freezer and find the small drain hole, usually in the floor or back wall of the freezer compartment. Pour warm water through it with a turkey baster or a squeeze bottle, and gently push a pipe cleaner or thin flexible tubing to break up the ice or gunk. When water flows freely to the pan below, you are done. For a stubborn plug, a cup of warm water with a splash of vinegar helps dissolve the biofilm that caused it.
Where does the water go if it is not leaking on the floor?
Normal condensation and defrost water drains into a shallow evaporator pan mounted near the compressor at the bottom back of the fridge. Heat from the compressor evaporates it, so you rarely notice. When you see water on the floor instead, either the pan is cracked or overflowing, or the water never reached the pan because the defrost drain is clogged. Pull the unit out and check the pan first; a dry pan with a wet floor points straight at the drain.