The short answer
Start with a blocked defrost drain: on a Conserv frost-free upright freezer it accounts for more of these than anything else, and a door seal drawing humid air in is the next thing to rule out. This is a frost-free upright: an evaporator behind the rear wall, a fan moving air, and a defrost cycle that is supposed to make the annual defrost unnecessary. Two of the four are owner work; the last one on the list is not, and knowing which is which saves the call-out.
What you observe
- Water running from under the door — An upright drains forward once anything inside it melts.
- A sheet of ice under the load — Water that melted, ran to the bottom and froze again where it stood.
- NEAR MISS - water with a soft load — Then the cabinet has a temperature fault and the water is the evidence. Read the cooling page for this freezer instead.
Causes, most likely first on this brand
- A blocked defrost drain — The likeliest cause on this brand: on a frost-free cabinet the defrost cycle produces water several times a day by design, and it all leaves through one small drain that blocks with debris and refreezes when it does.
- A door seal drawing humid air in — Next most likely: on an upright the door is the whole front of the cabinet, so a seal that is not touching feeds humidity in continuously and frost forms where it can later run out.
- Meltwater from frost that has thawed — Third on the list: everything in the cabinet that looks like ice was once humidity in the room, and any interruption - a defrost, a power cut, a lid left open - turns a rind of frost into more water than the cabinet was built to contain.
Check in this order, and why
- Find the defrost drain and check that it runs — On a frost-free cabinet it carries water several times a day, so it is the first thing to clear.
- Test the door seal all the way round — On an upright this is where the humidity gets in and where the water comes out.
- Empty the cabinet and find where the water is collecting — It separates water that melted inside from water arriving from somewhere else.
What an owner can safely check
- Flush the defrost drain with warm water — Use warm water and a soft flexible wire only - never force a rigid tool into it.
Tools: warm water, soft wireAbout 20 min
- Close the lid or door on a slip of paper at several points — Where it pulls free, humid air is arriving and making the water you are mopping.
Tools: a sheet of paperAbout 10 min
- Take the load out, dry the bottom of the cabinet and look for ice under it — You cannot judge where water is coming from through a layer of frozen load.
Tools: coolers, towelsAbout 45 min
- STOP HERE if the next step means the rear panel or a meter — Behind it are the evaporator and live terminals, and that is where owner checks end.
Before you open anything
Safety
Unplug the freezer or switch off its breaker before removing the rear wall panel or flushing the drain; a capacitor can hold a charge after the power is off. Do not pour hot water down the drain or push a rigid tool into it, because the tube runs past the evaporator and a drain heater on this design.
When to call a technician
Call when the drain runs clear, the door seals and the cabinet is level, and water still reaches the floor - and call rather than repeat the flush if the drain blocks again within a few weeks, because that points at the drain heater rather than at debris.
Nearest pages of this class
What this page does not cover
This page covers frost-free upright freezers as a class. Drain routing, drain-heater arrangements and panel layouts differ by family, and where a family- or model-specific page exists for your unit it is linked below and is the more specific answer. Not covered here: drain dimensions, cycle timings and part identifiers.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
