Here's what's supposed to happen. Your freezer defrosts itself several times a day: a heater melts frost off the coils, and the melt water drips into a trough, down a small drain hole, through a tube, and into a shallow pan under the fridge, where it evaporates. When the drain hole or tube plugs up with food bits, ice, or a film of slime, that water has nowhere to go. It overflows into the freezer, freezes in a sheet across the floor, or runs down the back wall and collects under the crisper drawers. Annoying, but it's a cleaning problem, not a dying appliance.
Three other things put water inside a fridge, and each has a tell. Water that seems connected to the ice maker or door dispenser — worse after heavy ice use — points at a supply line or icemaker fill issue, not the drain. A cracked drain pan under the fridge leaks onto the kitchen floor, not inside the cabinet. And droplets beading on shelves and the back wall during humid weather, especially near the door, are usually condensation from a tired gasket — the same dollar-bill gasket test from our guide to a refrigerator that's not cold enough sorts that out. Water pooled at the lowest point inside, with ice built up in the freezer, is the drain's signature.
Empty the area and unplug the fridge. Pull out the crisper drawers and anything stored low in the freezer. Unplugging matters — you'll be working around the evaporator fan and possibly removing a panel. Food keeps fine for the 20 minutes this takes with the doors closed between steps.
Find the drain hole. On most models it's in the freezer, centered low on the back wall or in the floor channel beneath the coils — sometimes visible, sometimes behind the rear interior panel. Your manual shows the exact spot. If ice has sheeted over the area, you'll need to clear it before the hole even shows.
Melt the ice with warm water, not boiling. Trickle warm water over the iced-up drain area, or lay a hot, wrung-out cloth on it. Boiling water can warp the plastic liner and crack the drain trough, so keep it comfortably hot-tap temperature. Sponge up melt water as you go.
Flush the drain until it runs free. Fill the baster with warm water — a spoonful of baking soda stirred in helps dissolve slime — and squirt it directly into the drain hole. You should eventually hear or see water trickling into the pan below. Repeat until the flush goes down without backing up. If a clog resists, work a flexible pipe cleaner or zip tie gently down the hole. Gently is the word: the tube below is thin plastic and punctures.
If it still won't drain, clear the tube from behind. Unplugged, roll the fridge out and remove the lower rear cover. The drain tube ends above the pan, and many have a small rubber duckbill valve at the tip that glues itself shut with gunk. Squeeze it open, rinse it out, and the drain usually flows again. Wipe out the pan while you're there — it's often furry.
Put it back together and watch it for a day. Drawers in, food back, plug in. Check under the crisper drawers the next morning. Dry means done.
Attacking the ice with a screwdriver or knife. Chipping ice off the freezer floor is how liners get punctured and coils get nicked. Warm water is slower and completely safe.
Pouring chemical drain cleaner down the hole. This is a food-storage appliance and a thin plastic tube. Harsh cleaner has no business in either. Warm water and baking soda do the job.
Mopping it up and hoping. The water you see is one defrost cycle's worth. The clog keeps producing it, the ice layer thickens, and eventually it can reach the evaporator fan — turning a 20-minute flush into a repair call.
Pooled water plus freezer ice almost always equals a clogged defrost drain, and the fix is warm water, patience, and a turkey baster — no parts, no technician. It belongs to the same family of boring-but-free appliance fixes as clearing a dishwasher that won't drain: a drain that can't drain. If the complaint runs the other way — the cycle finishes but dishes come out filmed and gritty — that's a wash problem rather than a drain problem, and our guide to a dishwasher not cleaning dishes sorts the spray-arm, filter, and water-temperature checks in order. If you've flushed the drain, cleared the tube end, and water still collects inside, then it's time to weigh repair against the fridge's age — our rundown of how long home appliances last helps with that call.
Because the crisper drawers sit at the lowest point of the fridge compartment, directly below the back wall the drain water runs down. Melt water from the freezer's defrost cycle overflows the clogged drain, travels down the wall, and collects there. Clear the drawers out, flush the drain, and the puddle stops refilling.
That's defrost water that couldn't get down the drain. It spreads across the freezer floor and refreezes a little more every cycle. In side-by-side models it often shows up as ice at the bottom of the freezer and water weeping out the door seam. Same root cause, same flush fix.
Yes, on a low or medium setting, kept moving and a few inches away. High heat held in one spot can warp the plastic liner. Warm water on a cloth does the same job with zero risk, which is why it's the first recommendation.
Twice a year is a good rhythm for most households, and it takes about two minutes once the fridge is open. Kitchens that produce a lot of loose food debris — or fridges that have clogged once already — benefit from a quick flush whenever the coils get their scheduled cleaning.
When it tracks with ice maker or water dispenser use, when it appears on the kitchen floor in front of the fridge rather than inside, or when the inside water is condensation beading on shelves instead of a pool at the bottom. Those point to a supply line, a cracked pan, or a door gasket — different fixes, covered in the checks above.