The short answer
On the TMRI line, the most common reason a refrigerator is not cooling is door seal, door alignment or simple overloading. On this page that cause is ranked ahead of airflow blocked by a frosted evaporator, which is where the order departs from the brand-generic article above; the ranking below says what about this platform moved it. Two of the three causes below are owner-checkable with no tools worth naming, and the last of them is a service call.
What you see on the TMRI line
- The compressor runs and never cycles off — A healthy unit rests between cycles. One that never stops is trying to reach a temperature it cannot reach.
- Warm air coming off the back or the toe grille — Some heat there is normal. Air hot enough to be uncomfortable means the condenser is rejecting more heat than it can shed.
- Food spoiling faster than the display suggests it should — Trust a thermometer on a shelf over the panel reading; a failed sensor lies to the panel first and to you second.
- The cabinet is warm but the unit is clearly running — The compressor hum is there and the light comes on, yet the air inside is no colder than the room after several hours.
- NEAR MISS — it cools but rattles, hums or buzzes — A noise complaint on a unit that still reaches temperature belongs on the noise page for this appliance, not here.
Causes, most likely first on the TMRI line
- Door seal, door alignment or simple overloading — A door held open by a shelf, a drawer or a bag, or a gasket gone hard with age, admits humid air faster than the system can remove it — and the moisture becomes the frost that blocks the airflow. It ranks where it does because it is the cheapest possible explanation and because it is very often the start of the chain rather than a competitor to it. The TMRI key covers a single model, so nothing on this page has to be qualified across capacities or configurations.
- Airflow blocked by a frosted evaporator — The defrost cycle stops clearing the evaporator, frost builds into a slab, and the slab blocks the only path cold air has into the cabinet. The unit keeps running because the sensor it trusts never sees the temperature it wants. The failure is gradual, silent and complete — the unit sounds perfect right up to the point where nothing in the cabinet is cold.
- Sealed-system or compressor fault — A leak, a blockage or a compressor that no longer pumps ends cooling altogether. The motor may still hum, which is exactly why this cause is diagnosed last rather than first. It stays last because it is the least likely of the group, the most expensive, and the only one that is not an owner repair under any circumstances.
Check in this order, and why
- First: Close the door on a strip of paper and pull — If the paper slides out without resistance anywhere along the edge, the seal is not sealing there. It comes first because it is the cheapest of the three to exclude and because everything below it is harder to read while it is unresolved.
- Second: Look behind the freezer rear panel for a frost slab — Ice visible around the panel seams settles the question before any tool comes out.
- Third: Only after the checks above: is the condenser cold and the evaporator dry? — A condenser that never gets warm while the compressor runs points this way. Stop there and call.
Before you open anything
Safety
Switch the unit off at the breaker before any panel comes off, and remember a capacitor can stay charged afterwards. Pull the unit out slowly and with help rather than walking it on its corners, because a loaded cabinet is far heavier than it looks and the compressor mounts do not like being dropped. Nothing on this page asks you to open the refrigerant circuit, and nothing should: that is licensed work and the pressure inside is real.
Models in the TMRI family
Reference| Model number | Family key |
|---|---|
| TMRI 180S | conserv:refrigerator:tmri |
When to call a technician
Call once the airflow and condenser checks are clean, because everything left needs a meter on live terminals or gauges on the sealed system. Call immediately, without finishing the list, if you smell burning, see oil at the compressor or hear the compressor try to start and trip repeatedly — that pattern damages the part that is trying to start.
