The short answer
On a top-freezer, a cold freezer with a warm fridge is an airflow problem and both compartments warming together is a cooling problem. Establish which pair you have before touching anything else.
What you actually see and hear
- Freezer still solid, fridge warm — Air is not reaching the fridge. The damper or the duct.
- Both compartments warming slowly over days — Frost on the evaporator or a failing defrost system.
- Compressor running constantly, neither compartment cold enough — Heat not leaving, or ice choking the airflow.
- Warm and completely silent — Power or the start circuit. The urgent case.
- NEAR MISS - warm for an hour after a big shop — A cabinet catching up, not a fault.
Causes, most likely first on this machine
- Frost on the evaporator choking the airflow — First. On a single-evaporator cabinet ice stops the cold reaching either compartment, and it builds over weeks before anyone notices.
- Damper or duct between the compartments blocked — Second, and it produces the classic cold freezer with a warm fridge - often just a packet pushed against the vent.
- Condenser coil blocked with dust — Third. Heat cannot leave the cabinet, so the compressor runs and runs.
- Evaporator fan not running — Fourth. The cold is being made and is not being moved.
- Door seals or a door left ajar — Fifth, and a fridge door held open by a bottle is a very common cause.
- Compressor or sealed system — Last, and the least likely.
Check in this order, and why
- Put a thermometer in each compartment — The fridge belongs at forty degrees Fahrenheit or below, the freezer at zero or below.
- Establish whether the freezer is still hard — It splits the list in two immediately.
- Find the vent between the compartments and clear it — A packet against it is a complete diagnosis.
- Listen for the freezer fan with the door switch held in — Silence there explains a lot.
What an owner can safely check
- Put a thermometer in each compartment and read after a day — Judge by numbers, not by how the milk feels.
Tools: thermometerAbout 1440 min
- Clear the vent between freezer and fridge — On this layout that duct is the fridge's only supply of cold.
About 15 min
- Vacuum the condenser coil and give the cabinet clearance — Do this before spending anything at all.
Tools: vacuum, soft brushAbout 30 min
- Check both door seals with a sheet of paper all round — A fridge door held ajar warms the whole cabinet.
Tools: paperAbout 20 min
- Empty and defrost the cabinet fully for a day — If cooling returns, the defrost system is the fault.
Tools: cooler, towelsAbout 1440 min
- STOP HERE before removing the rear freezer panel or testing the damper — Live terminals and a heater are behind it.
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. The defrost heater and live terminals sit behind the rear panel inside the freezer compartment, and a capacitor can hold a charge after the power is off. Never melt frost with a heat gun or a naked flame, and never chip at ice with a metal tool near the liner or the tubing behind it.
When to call a technician
Call when a full defrost restores cooling, because that proves the defrost system is failing and the ice will come back. Call when the freezer is hard, the vent is clear and the fridge stays warm, which usually means the damper or the fan. Call immediately if the compressor never runs. Keep the fridge at forty degrees Fahrenheit or below and the freezer at zero or below, and move perishable food once you suspect a real fault.
Nearest pages of this class
What this page does not cover
This page is written for the top-freezer refrigerator class, not for one family or model line. Where a brand- or model-specific page exists for your unit it is the more specific answer and it is linked above, so go there first if your machine is named. What is deliberately not here: fan and damper part numbers, thermistor values, refrigerant charge and shelf dimensions, all of which differ by family and belong on the page for that family.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
