The short answer
On a frost-free cabinet, water is almost always a blocked defrost drain. On a manual-defrost cabinet there is no drain to block, so water is melt or condensation - and if the contents are softening, the leak is the smaller half of the problem.
What you actually see and hear
- Ice sheeting on the floor of a frost-free freezer — The defrost drain is blocked and melt water freezes where it sits.
- Water appearing under the cabinet at the back — The evaporation pan, full, cracked or knocked out of place.
- Water with the contents softening — Cooling failure first. The water is a symptom.
- Ice around the door opening with drips below — Humid air entering past the seal.
- NEAR MISS - a wet floor after a manual defrost — Expected. There is no drain system to carry that water away.
Causes, most likely first on this machine
- Blocked defrost drain on a frost-free cabinet — First. It is narrow, it runs cold, and it blocks with debris or an ice plug, after which melt water goes wherever gravity takes it.
- Evaporation pan full, cracked or displaced — Second. It is under the cabinet and it gets knocked every time the freezer is moved.
- Condensation at the door seal — Third. A hardened or damaged seal lets humid air reach cold surfaces continuously.
- Melt water from a manual defrost — Fourth, and not a fault: a manual cabinet is designed to be defrosted with towels and a tray in place.
- Cabinet not level — Fifth. A forward lean delivers melt water to the floor instead of the drain.
- A cabinet that has stopped holding temperature — Last in the list but first in importance if the food is softening.
Check in this order, and why
- Check the contents first — Softening food turns this from a leak into a cooling failure.
- Look at the freezer floor for ice — On a frost-free cabinet that is the drain, and it is the usual answer.
- Pull the cabinet out and check the evaporation pan — Full, cracked or sideways are all common.
- Check the seal and the cabinet level — Both are quick and both stop the puddle returning.
What an owner can safely check
- Check the contents and put a thermometer in the cabinet — Decides whether this is a nuisance or an emergency.
Tools: thermometerAbout 15 min
- Clear the defrost drain from inside with warm water — A turkey baster or a soft tube only - never a metal probe.
Tools: turkey baster, warm waterAbout 30 min
- Pull the cabinet out, empty the evaporation pan and reseat it — Check it for cracks while it is out.
Tools: towel, shallow trayAbout 20 min
- Clean the door seal and test it with paper all round — Grit holds a seal open more often than wear does.
Tools: cloth, paperAbout 20 min
- Level the cabinet with a slight backward tilt — It keeps melt water heading for the drain.
Tools: spirit levelAbout 20 min
- STOP HERE before removing the rear panel to reach a frozen drain — The defrost heater and live terminals are behind it.
Before you open anything
Safety
Unplug the appliance or switch off its breaker before removing any panel - a capacitor can hold a charge after the power is off. A capacitor can hold a charge after the power is off, and on a frost-free cabinet the defrost heater sits directly behind the rear panel. Never use a heat gun or a naked flame to clear frost, and never chip at ice with anything metal near the evaporator.
When to call a technician
Call when the drain will not clear from inside the cabinet, because the blockage is then behind the rear panel where the heater is. Call urgently if the contents are softening as well, since that is a cooling failure with a leak attached and the food has a limited amount of time. Clearing a drain, emptying a pan and levelling a cabinet are all owner jobs and they account for most of the water found under a freezer.
Nearest pages of this class
What this page does not cover
This page is written for the domestic freezer class, not for one family or model line. Where a brand- or model-specific page exists for your unit it is the more specific answer and it is linked above, so go there first if your machine is named. What is deliberately not here: fan and defrost part numbers, thermistor resistance values, refrigerant charge and basket dimensions, all of which differ by family and belong on the page for that family.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
