The short answer
On a Conserv frost-free upright freezer this complaint is usually a defrost cycle that has stopped running rather than the failure owners fear, and where it is not, a stalled evaporator fan takes most of the rest. 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. That order is what this page is for, because working it the other way round is how an afternoon gets spent on the least likely cause.
What you observe
- The cabinet is running and still not cold — It is working; something is taking the work away from it.
- It never seems to cycle off — A cabinet that cannot reach its setting will not stop trying.
- NEAR MISS - a new noise with the cabinet still cold — Noise without a temperature problem belongs on the noise page for this cabinet.
Causes, most likely first on this brand
- A defrost cycle that has stopped running — Top of the list here: on a frost-free cabinet the evaporator glazes over across weeks, airflow drops away, and the cabinet warms while the compressor runs on.
- A stalled evaporator fan — Second here: the cold on a frost-free upright is made behind the rear wall and delivered as moving air, so a seized fan leaves a very cold evaporator and a warming cabinet.
- A door that is not sealing — Third, and worth the two minutes: an upright loses its cold through the door every time it is opened, so anything holding that door a fraction open - a drawer proud of its runners, a frost ridge, a basket - runs the cabinet against the room all day.
- A sealed-system or compressor fault — Last, and the reason the order matters: it is genuinely the least likely of the four and the only one that needs a technician, a licence and recovery equipment.
Check in this order, and why
- Look behind the rear wall panel for a solid wall of ice — It is the check that names the defrost system on a frost-free cabinet.
- Open the door and listen for the fan before the light distracts you — It separates a cabinet not making cold from one not moving it.
- Test the door seal all the way round, and look for a frost ridge — Free to check, and on an upright it is where most of the cold leaves.
What an owner can safely check
- Open the door and listen for the fan — On a frost-free cabinet, silence with a running compressor names the fault.
About 5 min
- Close the lid on a slip of paper at several points along the rim — Where it pulls out freely, the gasket is not touching and warm air is arriving there.
Tools: a sheet of paperAbout 10 min
- Empty the cabinet into coolers and defrost it completely — Let it melt with the lid open rather than chipping at it, and dry the walls before reloading.
Tools: coolers, towelsAbout 60 min
- STOP HERE if the next step means a meter or the rear panel — That is where owner checks end and a service call begins.
Before you open anything
Safety
Unplug the freezer or switch off its breaker before taking the rear wall panel off; a capacitor can hold a charge after the power is off. Leave the door switch as it is - it cuts power to the fan when the door opens, and that blade is exactly what you would be reaching past.
When to call a technician
Call when the fan runs, the evaporator is clear, the door seals and the cabinet still runs warm - that combination has already ruled out everything an owner can reach. Call promptly if the evaporator glazes over again within weeks of a defrost, because a defrost system that is not running will keep costing you the contents of the cabinet.
Nearest pages of this class
What this page does not cover
This page covers frost-free upright freezers as a class. Defrost strategies, fan positions and drain routing 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: cycle timings, capacity figures 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.
