Refrigerator Not Cooling? What to Check Before You Call for Service

Quick answer

A fridge that isn’t cold enough usually has a simple cause: the temperature setting, a demo (showroom) mode that turns cooling off, food blocking the air vents, or a door that isn’t sealing. Check those first, and use a thermometer to see how warm it really is. The FDA says the fridge should stay at or below 40°F and the freezer at 0°F. If it’s still warm after the checks below, or the freezer is warm too, call for service.

First, find out how warm it really is

Cold air rushes out whenever the door opens, so the air always feels warm for a moment. Samsung suggests touching metal or glass containers instead, but an appliance thermometer tells you the most. The USDA FSIS method:

• Refrigerator: put the thermometer in a glass of water in the middle of the fridge and wait 5 to 8 hours. If it doesn’t read 38 to 40°F, adjust the control and check again 5 to 8 hours later.
• Freezer: put it between frozen food packages and wait 5 to 8 hours. Aim for 0 to 2°F. Skip the glass of water here, since Samsung notes the glass can shatter.

What	Temperature	Source
Refrigerator, food safety limit	40°F or below	FDA, USDA FSIS
Freezer	0°F	FDA, USDA FSIS
Thermometer reading to aim for in the fridge	38 to 40°F	USDA FSIS
Thermometer reading to aim for in the freezer	0 to 2°F	USDA FSIS
“Danger Zone,” where bacteria grow fastest	40 to 140°F	USDA FSIS

The number on the display is a setting, not a measurement. Use a thermometer to check. Source: FDA, Are You Storing Food Safely?; USDA FSIS, Refrigeration & Food Safety and Appliance Thermometers

Is your food still safe?

Food held above 40°F for more than 2 hours should not be eaten, according to USDA FSIS. If the thermometer reads above 40°F and you don’t know for how long, use the power-outage chart on FoodSafety.gov. A few common examples:

Food	What to do
Raw or cooked meat, poultry, fish, or seafood; lunch meat, hot dogs, bacon	Discard
Milk, cream, sour cream, yogurt	Discard
Fresh eggs and egg dishes	Discard
Soft cheeses (such as mozzarella, Brie, cottage, cream cheese) and shredded cheese	Discard
Cooked pasta, rice, or potatoes; casseroles, soups, stews	Discard
Cut fresh fruit and vegetables; pre-cut packaged greens	Discard
Hard cheeses (such as Cheddar, Swiss, Parmesan) and processed cheese	Keep
Butter, margarine	Keep
Uncut fresh fruit and vegetables	Keep
Ketchup, mustard, jelly, pickles, peanut butter	Keep
Bread, rolls, tortillas	Keep

Partial list. The full chart covers many more foods. Never taste food to decide whether it is safe. Source: FoodSafety.gov, Food Safety During Power Outage (refrigerated food chart)

Frozen food can be refrozen if it still has ice crystals or is at 40°F or below, though its quality may suffer. Ice cream and frozen yogurt go in the trash either way. Both FoodSafety.gov charts end with the same rule: when in doubt, throw it out.

Keep the doors shut while you work. The FDA says an unopened refrigerator without power keeps food cold for about 4 hours. For longer fixes (a full defrost takes a day or more), FSIS suggests coolers with frozen gel packs.

1. Check power, the cooling switch, and error codes

In most refrigerators, cold air is made in the freezer and pushed into the fresh-food section through vents (Whirlpool). If the freezer is cold but the fridge is warm, the cold air probably isn’t getting through (steps 4 and 7). If both are warm, start here.

• No light when you open the door? Check that the plug is in and the outlet has power (GE).
• A GFCI outlet. If the fridge is plugged into one, check whether it has tripped and needs a reset (Frigidaire).
• A tripped breaker. Switch it fully off, then back on, once. If it trips again, leave it off and call an electrician.
• Cooling turned off. Some refrigerators must be turned back on by hand after a power outage or surge, and cooling can get switched off by accident during cleaning (Whirlpool). On Samsung top-freezer models, check that neither compartment is in Off mode.
• Error codes. Samsung suggests a power cycle: unplug the fridge or turn off its breaker for 2 minutes, then restore power. It runs a self-test as it restarts and shows a code if it finds a problem, which may mean it needs service. On LG models, look up any code other than demo mode in LG’s error code list.
• Recently repaired? A fridge that was just serviced may still be in diagnostic mode. GE says disconnecting power for 30 seconds should reset it.

A fridge that goes quiet for a while is not always broken. The compressor and fans stop during the defrost cycle, which can last 30 to 45 minutes once or twice a day, according to GE. After a short power outage, the compressor may also wait a while before it restarts on its own.

2. Turn off demo, showroom, or Cooling Off mode

If the lights and display work but nothing gets cold, the fridge may be in a store display mode, which keeps the lights on but turns cooling off. It can be left on from the showroom or switched on by a stray button press.

• LG: the display shows O F F. Open the refrigerator door and hold the Refrigerator and Ice Plus buttons together for several seconds until the panel returns to normal. The exact steps differ for 2018-and-earlier and 2019-and-newer models.
• Samsung: the display shows OF OF, O FF, OFF OFF, or scrolling temperature bars. Samsung calls this Cooling Off mode. Hold the button combination for your panel until the fridge chimes. On Family Hub models, it’s in the Fridge Manager app under Fridge Settings. No service call is needed, but food will spoil if the mode stays on.
• Whirlpool: on some models the word Showroom lights up. The interior lights work, but neither section cools. Exit steps vary by model, so check your owner’s manual.
• GE: lists demo mode as a cause too. Your owner’s manual has the steps.

3. Check the setting, then give it time

• Digital displays. LG says a fridge set to 41°F or 43°F will not feel cold enough, and suggests 34 to 37°F if it’s too warm. If the panel is locked, hold Lock/Unlock for 3 seconds first.
• Dials and numbered settings. On numbered controls from Whirlpool and GE, a higher number is colder. On models that show the actual temperature, GE says to set it one degree lower instead.
• Wait between changes. Whirlpool says to wait at least 24 hours between adjustments. A fridge can take up to 28 hours to reach a new setting with the doors closed, per Samsung. A new fridge needs about 24 hours to cool (GE), and LG allows two to three days after installation or repair, depending on the food load.
• A big grocery load of warm food can take several hours to cool (Whirlpool). FSIS suggests dividing large pots of soup or stew into small, shallow containers first.

4. Clear the vents and load it right

Food pushed against the back and side walls blocks the vents that carry cold air. If the return vents are blocked, the fresh-food section can end up warm (Whirlpool).

• Keep food about 2 inches away from the vents, as Samsung recommends, and move tall items forward (GE).
• Rearrange the freezer too, as LG advises. That is where the cold air starts.
• Full, but not crammed. LG says to fill the fridge no more than 70% full for good airflow, and the FDA says not to pack it so tightly that air can’t circulate. Don’t leave it nearly empty, either: Samsung suggests keeping it at least two-thirds stocked so less warm air comes in each time you open the door.

5. Make sure the doors close and seal

A door that doesn’t seal lets warm, moist air in all day.

• Look for things in the way. GE lists trays, platters, pizza boxes, and ice behind the ice bin. LG points to shelves put back wrong and items sticking out of the door bins.
• Do the dollar-bill test (Samsung, Frigidaire). Close the door on a dollar bill, then pull it out. A slight drag means the seal is working. If it slides out easily, the seal is weak at that spot. Try a few spots around the door.
• Clean the gasket with warm, soapy water (Frigidaire). Samsung suggests wiping the seals with a damp cloth and dish soap once a month.
• Read the clues. Frost or condensation along the inside edge of the seal marks where the door isn’t sealing, according to Samsung. Or put a flashlight inside and close the door: where light shows, there’s a gap.
• Check the level. If the door doesn’t swing shut on its own from halfway open (about 45 degrees), GE says to adjust the leveling legs or rollers so the front sits higher than the back. A new fridge that isn’t level can fail the bill test, Samsung notes.
• Check the light. It should go out when the door is about 1 inch from closed (GE). A light that stays on adds heat.

A seal that has slipped out of its channel can be pushed back in. A torn, split, or warped seal needs service (Samsung).

6. Check the room, the clearance, and the condenser coils

• Room temperature. Whirlpool designs its refrigerators for rooms between 55°F and 110°F. GE says a fridge may not cool properly below 60°F or above 110°F. A hot garage in summer or a cold one in winter can cause trouble.
• Heat sources. Keep the fridge away from an oven, radiator, or other heat source, don’t install it behind a cabinet door, and don’t block the base grille (Whirlpool). Samsung adds direct sunlight.
• Clearance. Samsung asks for 2 inches at the top, back, and sides. GE generally calls for at least 1 inch, depending on the model. Your installation guide has the number for yours.
• Condenser coils. Dirty coils make the sealed system run less efficiently (GE), but many fridges never need coil cleaning. GE says that’s true of most of its models made since 2001, and Whirlpool says a typical home usually needs no routine cleaning. Dusty or greasy rooms and shedding pets change that. Our guide to cleaning refrigerator condenser coils shows where yours are, how often each brand says to clean them, and how to do it with the power off.

For what your fridge costs to run each month, see how much electricity a refrigerator uses.

7. Freezer cold but fridge warm? Look for frost and a stopped fan

Anything that blocks the cold air’s path out of the freezer can warm the fresh-food section while the freezer stays cold.

• Frost on the vents. Frost on the back wall near the vents blocks airflow even after you move the food, so it has to be cleared away (Samsung).
• A fan frozen in place. Ice or frost around a fan motor can stop it from turning. LG displays show ER FF for the freezer fan or ER rF for the refrigerator-compartment fan, and LG says this often follows an overfilled freezer or a door that wasn’t fully closed.
• Listen before you decide. Compressor hum, fans blowing, and refrigerant gurgling are all signs the unit is trying to cool (Frigidaire). A quiet fan isn’t always a problem, because the fans stop during defrost (GE). If a fan sounds like it’s hitting ice, see what each refrigerator noise usually means.

How to clear it. For light frost, Samsung suggests a damp cloth, or a plastic scraper for thicker patches. For heavy ice, LG’s steps are:

1. Move the food to another fridge or an insulated cooler.
2. Lay dry towels on the floor around the fridge.
3. Unplug it and leave the doors wide open for at least 24 hours. LG says melting takes about a day in summer and up to three days in winter.
4. Wipe the inside dry.
5. Plug it back in and allow 24 to 48 hours for it to get cold again.

No hair dryer or sharp tools. Frost comes from warm, moist air getting inside (Samsung). Frigidaire adds a warped door gasket, an ice chute flap that doesn’t close, and blocked airflow. Fix those too, or the frost can come back. If it returns anyway, or LG’s fan code is still there after a full defrost, both brands point you to service. A failed fan motor is an electrical part, so leave its replacement to a technician.

When it’s the sealed system

The compressor, the coils, and the refrigerant form a closed loop that the EPA describes as hermetically sealed at the factory. Under the Clean Air Act, anyone who adds or removes refrigerant, or attaches gauges to read the pressure inside, must be an EPA-certified technician. There is nothing to adjust here at home.

If the fridge runs but still doesn’t cool after everything above, schedule service. GE asks you to leave it plugged in until the technician arrives, so the symptoms are still there to diagnose. Keep the food in coolers in the meantime.

Brand quick reference

Brand	Suggested fridge setting	Time to settle	Worth knowing
LG	36 to 37°F; 34 to 37°F if it’s not cold enough	2 to 3 days after installation or repair	O F F = display mode. ER FF or ER rF = fan error, often from ice.
Samsung	38°F on most models (freezer -2°F)	Up to 28 hours to reach a new setting	OF OF or O FF = Cooling Off mode. Blinking temperature = too warm.
Whirlpool	Factory “mid setting”	24 hours between adjustments; 24 hours for a new freezer	Some models must be switched back on after an outage.
GE	Dial models: one number higher for colder	About 24 hours for a new fridge	Demo or post-repair diagnostic mode can stop cooling.
Frigidaire	37°F (freezer 0°F)	24 hours	Installed under 30 days ago? Call the installer first.

Settings and codes vary by model. Your owner's manual is the final word. Source: Manufacturer support pages listed below

To catch the next problem early, FSIS recommends keeping an appliance thermometer in the fridge and the freezer at all times. More help is in the refrigerator guides.