What this usually is
A standalone freezer on this family that is not holding temperature is usually losing its cold rather than failing to make it. A lid or door that is not sealing admits humid room air, which turns to frost inside and steadily defeats the cabinet. The seal and the condenser are owner work and account for most of it. This family resolves to one listing, which makes the page unusually definite about what it covers.
What the machine does
- Water pooling under the cabinet — Frost that has melted because the cabinet warmed. It is a symptom of this fault, not a separate one.
- Heavy frost building on the walls or the lid — Frost is moisture that arrived from the room. A cabinet growing frost quickly is a cabinet that is not sealing.
- The unit runs continuously and never cycles off — It is trying and not succeeding. That is a delivery or a heat-rejection problem, not a control fault.
- Ice cream soft while packaged food still feels solid — The most sensitive contents report first. It is a useful early warning and usually the first thing noticed.
- The lid does not drop shut on its own — A gasket that has hardened or a hinge that has weakened leaves a gap that never closes.
- NEAR MISS — the cabinet is silent and completely dead — No sound at all is a supply or start fault rather than a cooling one, and it belongs on a different page.
Causes, most likely first on this roster
- Door or lid seal not closing — First on this roster. A gasket that has taken a set, or a lid propped by an overfilled basket, lets humid room air in continuously, and the cabinet spends all its capacity on air rather than on food.
- Condenser coil choked with dust — Second. A freezer usually lives in a garage, a basement or a utility room, and those are dusty places. A coil that cannot shed heat leaves the compressor running without gaining ground.
- Thermostat or control fault — A control that has drifted or failed will hold the cabinet at the wrong temperature quite consistently, which is distinguishable from the causes above by how steady it is.
- Sealed-system or compressor fault — Last. The least likely cause on this roster and the only one that is not owner-serviceable at any level, which is precisely why it belongs at the bottom rather than the top.
Check in this order, and why
- Put a thermometer in the cabinet and leave it a few hours — Turns an impression into a measurement. It also tells you how far off the cabinet actually is.
- Close the lid or door on a strip of paper at several points — Paper that pulls out freely marks where the seal is not sealing, and that is where the frost will be heaviest.
- Look at how much frost has built up — Beyond a finger's thickness, frost is insulating the cabinet against its own contents and a defrost is overdue.
Safety before diagnosis
Safety
Pull the plug, or trip the breaker if the machine is hard-wired, before a single screw comes out — and remember that a capacitor stays charged after the supply is gone. If the cabinet has been warm for an unknown length of time, treat the contents as suspect before treating the appliance.
Models in the AT family — Every listing below is in scope. The table is the boundary of this page's generalization.
Reference| Model number | Family key |
|---|---|
| AT50FRE | attitude:freezer:at |
The line between a fix and a call
Stop at any sign of oil near the compressor, and call the same day. Oil outside the tubing means the system is open, and every hour it runs after that costs more to put right.
Nearest pages of this class
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