The short answer
The Artt ATTM refrigerator family covers two listings in the roster below, and on that platform a cabinet that runs without getting cold is usually a delivery problem rather than a sealed-system one. Of the things that stop a refrigerator cooling, the two most common cost a part that fits in a pocket and the least common costs more than many machines are worth. Airflow, the door and the condenser account for most of it; the compressor is blamed far more often than it fails.
The observables
- Both compartments are warm and the machine is running continuously — Either the air path is blocked at the source or the system is no longer moving heat.
- A door that does not pull itself shut from half open — A seal that has taken a set, or a cabinet leaning back too little, leaves a gap small enough to see past and large enough to run the machine continuously.
- One shelf or one drawer is warm while the rest is fine — Air distribution rather than cooling capacity. A blocked vent, a drawer not seated or food packed against an outlet will all starve one part of the cabinet.
- NEAR MISS — the freezer is too cold and the fridge is too warm — That pairing usually means the damper or the air split between compartments rather than a cooling failure, and it is worth ruling in before anything else is suspected.
Causes, most likely first on the ATTM line
- Airflow blocked by frost on the evaporator — Ranked first here, because defrost systems stall long before they fail outright, so ice builds quietly over weeks while the cabinet gives up a degree at a time, and by the time an owner notices the warmth the frost sheet is already the whole story. Every listing here is one base number with a different tail, so a cause that is true of one of them is true of all of them unless the tail is the thing that differs.
- Evaporator fan not running — Second here, because it is the only part in the cold half of the machine that has to keep turning, and when it stops the cabinet keeps making cold and stops delivering any of it.
- Thermostat or temperature sensor reading wrongly — Third here, because a control can only act on what it is told, so a sensor reading colder than the compartment really is will satisfy the machine early and leave the food warm.
- Defrost heater, sensor or control no longer completing the cycle — Last here, because it is invisible until the ice it should have cleared becomes the fault you can see, and separating the three parts needs the rear cover off and a meter on them.
Check in this order, and why
- Compare the two compartments before anything else — A hard-frozen freezer with a warm fresh-food side is an air-path fault. Both warm is a source fault.
- Check the door seals along their whole length — Close the door on a sheet of paper at several points and pull. Even resistance everywhere is a good seal; a point where the paper slides free is a gap running around the clock.
- Pull the machine out and look at the condenser — Dust on the coil and a condenser fan that is not turning are both visible from the back or through the lower grille, and both are owner-serviceable with the machine unplugged.
- Feel the condenser tubing for heat with the compressor running — Warm tubing means the compressor is pumping and the system has charge; tubing at room temperature while the compressor hums is the one reading that points at the sealed system.
Before you open anything
Safety
Take the plug out before the first screw, not after it: a capacitor can hold a charge after the power is off, and the fan behind a cover starts the moment power returns. Treat the tubing at the back as the fragile part of the machine: it is thin-walled, it carries refrigerant, and a kink or a puncture ends the cabinet rather than the repair. Do not lever against it, do not rest the machine on it, and leave the door switches wired exactly as you found them..
Models in the ATTM family — This article generalizes over every listing above; a page written for a single model would go further than this one does. Model numbers come from the platform data and are reproduced unchanged.
Reference| Model number | Family key |
|---|---|
| ATTM18** | artt:refrigerator:attm |
| ATTM18**2 | artt:refrigerator:attm |
When to call a technician
Call when two successive checks have come back clean, because a shortlist that survives that far is naming a part behind a panel rather than a condition an owner can correct. Anything that only costs comfort can wait for a convenient appointment. Anything that has the cabinet warming, or water on a floor that will not dry, should be looked at the same day.
Other faults covered for the ATTM line
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
