The short answer
Water from a frost-free upright is defrost melt that has lost its way. Ice on the cabinet floor and water in front of it are the same blocked drain, and clearing it is usually the whole repair.
What you actually see and hear
- Ice sheeting across the cabinet floor — The defrost drain is blocked and melt water freezes where it sits.
- Water on the floor in front of the cabinet — The same blockage, overflowing forward.
- Water under or behind the cabinet — The evaporation tray, full, cracked or displaced.
- Water with the contents softening — A cooling failure. The water is the symptom.
- NEAR MISS - frost around the door opening — A seal letting humid air in, which feeds everything above.
Causes, most likely first on this machine
- Blocked defrost drain — First and by a wide margin on a frost-free cabinet. Debris or an ice plug stops the melt water leaving.
- Evaporation tray full, cracked or displaced — Second. It sits on the compressor pan and gets knocked whenever the cabinet is moved.
- Door seal admitting humid air — Third. More moisture in means more ice, more melt and more water to deal with.
- Cabinet not level — Fourth. A forward lean sends the water to the floor rather than the drain.
- Defrost system failing and producing large melts — Fifth. A cabinet that ices up heavily releases a lot of water when it finally does defrost.
- A genuine internal fault — Last, and rare on an appliance with no plumbing.
Check in this order, and why
- Look at the cabinet floor for ice — It is the most informative single look on a frost-free freezer.
- Check the contents are still solid — It separates a nuisance from an emergency.
- Pull the cabinet out and check the evaporation tray — Expect it to be out of place if the freezer has been moved.
- Check the seal and the cabinet level — Both stop the puddle returning.
What an owner can safely check
- Check the contents and put a thermometer in the load — Frozen solid means water; softening means cooling.
Tools: thermometerAbout 15 min
- Empty the cabinet and clear the defrost drain with warm water — A turkey baster or a soft tube. Never a metal probe.
Tools: turkey baster, warm waterAbout 40 min
- Pull the cabinet out, empty the tray and reseat it square — 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 — Less humid air in means less ice and less melt.
Tools: cloth, paperAbout 20 min
- Level the cabinet with a slight backward tilt — It keeps the melt water heading for the drain.
Tools: spirit levelAbout 20 min
- STOP HERE before removing the rear interior 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. The defrost heater and live terminals sit behind the rear interior panel of a frost-free cabinet, and a capacitor can hold a charge after the power is off. Never use a heat gun or a naked flame to clear frost, and never chip ice with anything metal near the liner.
When to call a technician
Call when the drain will not clear from inside the cabinet, because the blockage is then behind the rear interior panel with the heater and the live terminals. Call urgently if the contents are softening as well, since that is a cooling failure with a leak attached. Clearing a drain, emptying a tray and levelling a cabinet are all owner jobs and they account for most of the water ever found under an upright freezer.
Nearest pages of this class
What this page does not cover
This page is written for the upright frost-free 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 drawer 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.
