The short answer
On a True Refrigeration freezer, a freezer that runs without holding temperature is usually losing the battle rather than broken: a lid or door that no longer seals, a condenser that cannot shed heat, or a room that has gone too warm for it. Check what it is fighting before you suspect what is inside it. A cabinet in a working kitchen is opened many times an hour by people who are not thinking about the door, so load and sealing outrank component failure.
What you are actually seeing
- Frost is building much faster than it used to — Warm damp air is getting in from somewhere.
- The compressor never switches off — It is never reaching its setting.
- Packages at the top are thawing while the bottom is solid — Air is not circulating, which points at the air path rather than the compressor.
- NEAR MISS — water on the floor with the contents still frozen — That is a drainage fault and it has its own page.
Causes, most likely first on this freezer
- Lid or door not sealing — a tired gasket, frost on the sealing face, or a hinge that has dropped — Ranked first on True Refrigeration: a cabinet in a working kitchen is opened dozens of times a shift, often with a hand full, so the gasket and the closer take more punishment than anything else on the machine. On this one, remember that the door is opened constantly by people carrying things, so load discipline outranks parts.
- The evaporator is under a sheet of ice and air can no longer pass it — Second: high door traffic puts moisture onto the evaporator faster than the defrost cycle can clear it, so a marginal defrost fails under load first.
- Interrupted power — a switched outlet, a tripped breaker or a loose plug — Third: a cabinet that loses power for hours at night and runs all day looks exactly like a cabinet with a weak sealed system.
- A fault on the refrigerant system itself — Bottom of the list, which is the useful part: a commercial deck is built to run continuously for years, so it is the last suspect rather than the first.
Check in this order, and why
- First — shut the lid or door on a strip of paper at several points and pull — It is free, it takes ten minutes, and it settles the commonest cause before you touch anything else.
- Then — look for a sheet of frost on the evaporator panel or the air outlets — A sheet rather than a dusting confirms the airflow story and rules out the sealed system.
- Only then — feel whether the condenser is warm and listen for the compressor cycling — Only after the seal, the coil and the room have been dealt with, which is why it comes after everything above it.
What an owner can safely check
- Clean the sealing faces and test the seal all the way round — Wipe frost and crumbs off both the gasket and the face it meets, then test with a strip of paper at top, bottom and both sides.
Tools: cloth, paperAbout 15 min
- Confirm the outlet is live, unswitched and holding — Plug a lamp into the same outlet and leave it on for an evening. A lamp that goes out names the fault.
Tools: lampAbout 10 min
- STOP before testing anything electrical with the power on — The checks above are all cold checks. Anything that needs power applied is where an owner check ends.
Before you open anything
Safety
Unplug the cabinet or switch off its breaker before any panel comes off, and let a capacitor discharge before you reach in. A freezer full of food is extremely heavy — empty it before you move it, and walk it rather than dragging it. Never chip frost off with a knife or a screwdriver: the evaporator tubing is soft, and a puncture turns a cheap fault into a scrapped cabinet.
When it stops being an owner job
Call once the seal, the coil, the clearance and the power have all been cleared and the cabinet still will not hold. Call sooner if the compressor buzzes and stops repeatedly, if there is oil visible around the tubing, or if the cabinet is warm at the sides and the coil is clean.
Nearest pages of this class
What this page does not cover
This page is written for the True Refrigeration freezer as a class, not for one family or one model line. Where a family-specific page exists for your unit it is linked above and it is the more specific answer. Deliberately not here: part numbers, wiring colours, torque figures and any measured value, all of which differ by family.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
