The short answer
On a Tehanld refrigerator this is usually a stalled defrost cycle icing the evaporator rather than a sealed-system or compressor fault. The first checks below cost nothing and need no panel off; the one at the bottom of the list is a service call.
What you actually observe
- 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.
- The freezer still holds but the fresh-food side does not — Cold is being made and is not being moved, which points at airflow rather than at the sealed system.
- NEAR MISS: only the ice maker has stopped — Cooling is fine. That is an ice or water-supply fault, not a cooling one.
Causes, most likely first on this build
- A stalled defrost cycle icing the evaporator — The evaporator frosts over, the air path closes, and the cabinet warms while the compressor keeps running. First on Tehanld because these units are fitted into spaces with almost no air gap, so restriction is the brand's characteristic fault.
- A condenser coil blanketed in dust — The coil sheds the heat the system removes. Covered, it cannot, and the unit runs constantly without pulling the cabinet down. Next, and relatedly: a restricted vent turns a normal cycle into an overheating one.
- 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. Third on this build, because a board decides the behaviour rather than a switch, so a control fault reads as a machine declining to act.
- 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, and the order is the point: it is the least common cause here and the only one that is not an owner fix.
Check in this order, and why
- 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.
- Feel the condenser area for heat and look at the coil — A coil that is hot and furred tells you where the heat is stuck.
- 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.
What an owner can safely check
- 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
- Pull the unit out, vacuum the condenser coil and the fan grille behind or beneath it — This is the single most productive owner check on any refrigerator and it needs no skill.
Tools: a vacuum, a soft brushAbout 30 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
- STOP HERE: anything past this point needs gauges on the sealed system — That is licensed work and it is where an owner check ends.
Before you open anything
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.
Where the owner fix ends
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.
Closest pages to this one
What is deliberately not on this page
This page is written for the Tehanld 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.
