The short answer
Start from a stalled defrost cycle icing the evaporator: on a Temprium refrigerator that is the likeliest explanation for what you are looking at, and a sealed-system or compressor fault is the least likely. Most of this you can settle before anyone is called.
What the symptom looks like
- The cabinet is warm while the unit is plainly running — You can hear it working. The air inside is not cold and has not been for a day or more.
- Frost has built into a sheet on the freezer back wall — Not the usual light dusting but a solid layer, which is airflow stopping rather than cold failing.
- NEAR MISS: the unit is silent and nothing is cold — That is a no-power or start-relay fault and it belongs on a different page. Leave this one.
Causes ranked for this brand, likeliest first
- A stalled defrost cycle icing the evaporator — The evaporator frosts over, the air path closes, and the cabinet warms while the compressor keeps running. It leads on Temprium: a cabinet cut-out leaves a compact unit almost no air gap, so anything that restricts flow bites here first.
- A control board or thermistor giving the wrong picture — The unit acts correctly on a wrong reading. It stops calling for cooling, or calls for it endlessly, and nothing mechanical is wrong. Next, and relatedly: a board decides the behaviour rather than a switch, so a control fault reads as a machine declining to act.
- A failed or obstructed evaporator fan — The fan behind the freezer rear panel moves cold into the cabinet. When it stalls, cold is made and never delivered. Third on this build, because a motor is a wear part with bearings and windings, and both give warning before they stop.
- A sealed-system or compressor fault — The system has lost charge or the compressor is no longer pumping. The unit runs and never gets cold anywhere. Last, which is why it is checked last: it is the least common cause here and the only one that is not an owner fix.
The order to work in
- Look at the freezer rear panel for a frost sheet — It separates a stopped air path from a stopped cooling system before any tool comes out.
- Check the set point and whether any demo or showroom mode is active — A control fault and a control setting look identical from the outside, and one of them is free to fix.
- Open the freezer and listen for the fan with the door switch held in — It tells you in seconds whether cold is being moved at all.
Owner checks, in order
- Empty the freezer, switch the unit off at the wall and leave the doors open until all frost is gone — Cold returning afterwards names the defrost system as the cause and needs no part to prove it.
About 60 min
- Read the set point, then switch the unit off at the wall for a few minutes and back on — A reset clears a latched control state. If cold returns and then fails again, the control is the suspect.
About 15 min
- Hold the freezer door switch in and listen for the fan — Silence with the compressor running is the answer. Do not reach in while it is powered.
Tools: a torchAbout 10 min
- STOP HERE: anything past this point needs gauges on the sealed system — That is licensed work and it is where an owner check ends.
Read this before you start
Safety
Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. Get help before pulling the cabinet out: a loaded unit runs away from you on a hard floor and the supply line behind it tears easily. Never open sealed-system tubing.
When this stops being a do-it-yourself job
Call once the coil is clean, the gaskets pass the paper test and a full defrost has not restored cold. Call immediately for oil near the compressor or a burning smell: oil outside the tubing means the system is open. A refrigerator holds food safely at 40 degrees F (4 degrees C) or below, so treat a cabinet above that for hours as a food decision first.
Nearest pages of this class
What this page leaves to a more specific one
This page is written for the Temprium refrigerator as a class, not for one family or model line. Where a family-specific page exists for your unit it is linked below and it is the more specific answer. Deliberately not here: wiring colours, part numbers, board pinouts and service-mode sequences, which all 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.
