The short answer
A cabinet that runs continuously and still warms up has lost airflow far more often than it has lost refrigerant. The compressor is working; something is stopping the cold it makes from reaching the food. Listen at the freezer with the door open and the light switch held in. Hearing the evaporator fan separates an airflow fault from a fan fault before anything is opened. On a SPT refrigerator the cause that ranks first is evaporator fan motor failed.
What you observe
- The freezer is cold but the refrigerator is not — Airflow between the two compartments has stopped.
- The compressor never stops running — The same fault seen from the other side: it never reaches its target.
- NEAR MISS — the cabinet is silent and nothing is cold — That is a power or start-relay fault and it is a different page.
Causes, most likely first on a SPT refrigerator
- Evaporator fan motor failed — The fan behind the freezer panel is what pushes cold into the fresh-food side, and when it stops the freezer stays cold while the refrigerator warms. It ranks first on a SPT refrigerator because there is very little slack behind the panels of a compact cabinet, so anything that restricts restricts completely.
- Defrost cycle stalled, evaporator iced over — The heater or its control stops clearing the coil, frost builds into a solid sheet behind the freezer panel, and air stops moving while the compressor runs on. Second on this platform: an adaptive defrost stalls quietly weeks before it fails outright, so the cabinet warms long before anything looks wrong.
- Condenser coil blanketed in dust — The coil rejects the heat the compressor removes, and once it is covered the machine runs continuously without ever getting the cabinet down. Ranked here because a shallow plinth or a tight cut-out fouls a coil far faster than an open back does.
- Door not sealing, or left ajar — Warm humid air entering continuously loads the evaporator with frost and the compressor with work, and the cabinet never recovers. Last, and the reason to work down the list rather than guess: a cabinet opened constantly, or one whose door is not pulled shut, never gets a chance to catch up.
Check in this order, and why
- Open the freezer, hold the door switch in and listen for the fan — A cold freezer with a warm cabinet is the fan's signature.
- Empty the freezer and look at the rear panel for a sheet of frost — A solid sheet rather than a dusting settles it immediately.
- Feel the coil area at the back or in the plinth for heat and dust — A thick dust blanket is visible and it is the cheapest fix here.
What an owner can safely check
- Empty the cabinet, switch it off and leave both doors open for a full defrost — Cold restored afterwards confirms the defrost system as the cause.
Tools: towelsAbout 45 min
- Unplug the cabinet and vacuum the condenser coil and its grille thoroughly — Do this twice a year on a compact or built-in cabinet, more with pets.
Tools: vacuum, soft brushAbout 25 min
- Check the gasket grips paper all the way round and clean the sealing face — Also check the cabinet is tipped slightly back so doors self-close.
Tools: cloth, paperAbout 15 min
- STOP HERE if the next step needs a meter on live terminals or a panel off — That is where an owner check ends and a service call begins, whatever the ranking above says.
Before you open anything
Safety
Unplug the cabinet or switch off its breaker before removing any interior panel — a capacitor can hold a charge after the power is off. Never cut, open or attempt to recharge a sealed refrigerant line.
When to call a technician
Call once the defrost, the coil, the door and the fan are all clean and the cabinet still runs warm: what is left is the sealed system, and refrigerant work is licensed work. On a countertop machine, get a price before committing — the labour on a small machine is the same as on a large one, and the machine is not.
Nearest pages of this class
What this page does not cover
This page is written for the SPT refrigerator as a class, not for one family or model line. Where a family- or model-specific page exists for your unit it is linked above, it is the more specific answer, and it is the one to read first. Deliberately not here: part numbers, wiring colours, panel removal order and torque figures, all of which differ between families under the same nameplate.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
