Refrigerator Not Cooling? Causes, Fixes and When to Call a Technician

Last reviewed: November 2026 · Written for homeowners by the Refrigerator Repair Help team

First, check how warm it really is

Put an appliance thermometer in a glass of water on the middle shelf and wait a few hours. The FDA recommends keeping the fresh-food section at or below 40°F and the freezer at 0°F. If the water reads above 40°F, food safety is at risk and the problem is real, not just a feeling that the milk isn’t cold enough.

Refrigerator not cooling but the freezer is cold

This is the most common version of the problem, and it makes sense once you know how most frost-free refrigerators work. There is only one cooling coil — the evaporator — and it sits behind the freezer’s back panel. A small fan blows that cold air into the freezer and through a vent or damper into the fresh-food section. If anything blocks that path, the freezer stays cold while the fridge warms up.

• Evaporator fan motor failure. Open the freezer and listen. If you don’t hear a fan running (and feel no airflow from the vents) while the compressor is on, the fan motor is a likely suspect.
• Defrost failure. If the freezer’s back panel or the vents are covered in thick frost or ice, the defrost heater, defrost thermostat or defrost control has probably failed. Ice blocks the airflow to the fridge side.
• Stuck air damper. Many models use a motorized or manual damper to meter cold air into the fridge. A damper stuck closed starves the fresh-food section.
• Faulty thermistor or control board. The sensor or board that decides when to cool can fail and send the wrong signal.

Both the fridge and freezer are warm

• Dirty condenser coils. Dust and pet hair on the coils under or behind the fridge stop it from releasing heat. Cleaning them is the cheapest fix there is.
• Condenser fan not running. On most modern fridges a small fan next to the compressor pulls air over the coils. If it’s seized, the unit overheats.
• Start relay or compressor problem. A click every few minutes followed by silence often means the compressor is trying to start and failing. See compressor repair.
• Sealed-system leak. If the compressor runs constantly but nothing gets cold, refrigerant may have leaked. This needs a certified technician.

Checks you can safely do yourself

1. Confirm the controls weren’t turned down, switched off or set to a showroom or “cooling off” mode. On many Samsung models, for example, the display shows “OF OF” in that mode.
2. Make sure the vents inside the fridge and freezer aren’t blocked by food.
3. Pull the fridge out, unplug it and vacuum the condenser coils and the fan area.
4. Check that the doors close fully and the gaskets seal. Close a dollar bill in the door; if it slides out easily, the seal is weak.
5. If the freezer coil is iced over, a manual defrost (unplugged, doors open, towels down for 24 hours) can restore cooling temporarily — but the defrost fault will come back, so book a repair.

What it usually costs to fix

Ranges are national estimates from cost guides such as Angi and Fixr. See the full refrigerator repair cost guide for repair-versus-replace advice.

Brand-specific not-cooling problems

Some brands have well-known patterns. Owners of LG refrigerators with linear compressors have reported compressor failures; Samsung French-door models often ice up behind the evaporator panel; Whirlpool and GE units commonly lose an evaporator fan or defrost component. Telling the technician your brand and model helps them bring the right part.

Get refrigerator not cooling repair near you

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Safety note: unplug the refrigerator before touching any wiring, fans or panels. Sealed-system work — anything involving refrigerant or the compressor circuit — must be done by an EPA Section 608 certified technician.

Frequently asked questions