How to Reset Your Refrigerator When It Stops Cooling

Start with the simplest reset: unplug and wait

A refrigerator that has stopped cooling often responds to a hard reset—unplugging it completely for 5 to 10 minutes, then plugging it back in. This clears the control board's memory and can restart the cooling cycle if a minor electrical glitch has frozen the system. The compressor (the part that actually cools) may have tripped a safety switch, and the reset gives it a chance to restart fresh.

Before you unplug, turn off any ice maker or water dispenser features if your model has them. When you plug the refrigerator back in, you may hear the compressor kick on within a few minutes—a humming or clicking sound means the reset worked. If the fridge stays silent, move to the next step.

Key Takeaways

• Unplug the refrigerator for 5 to 10 minutes to reset the control board, then plug it back in and listen for the compressor to start humming.
• Check that the thermostat dial is set to a cooling temperature (usually between 35 and 38 degrees Fahrenheit for the fridge section) and not accidentally turned to off.
• Clear the vents inside the fridge and freezer—blocked airflow from ice buildup or stored items is one of the most common reasons cooling stops.
• Vacuum the condenser coils on the back or bottom of the refrigerator, since dust buildup prevents heat from escaping and shuts down cooling.
• If the compressor still does not run after a reset and the thermostat is set correctly, the problem likely requires a technician or replacement.

Check the thermostat dial and make sure cooling is actually on

Many refrigerators stop cooling because the thermostat dial has been turned to the off position or to a setting so high that the compressor never kicks on. Look inside the fridge for a dial or digital display labeled with temperatures or numbers (often 1 to 7, with higher numbers meaning colder). If it is set to off or to the lowest number, turn it up to the middle range—usually around 4 or 5 on a dial, or 35 to 38 degrees Fahrenheit on a digital display.

Wait 15 to 20 minutes after adjusting the thermostat. The compressor may not start immediately; it cycles on and off depending on how cold the fridge already is. If you hear humming or feel cold air coming from the vents after this wait, the thermostat was the problem. If nothing changes, the thermostat itself may be broken and need replacement.

Clear blocked vents and airflow inside the fridge and freezer

The cold air in a refrigerator moves through vents from the freezer section to the fridge section. If those vents are blocked by ice, frost, or stored items, cold air cannot circulate and the fridge warms up even though the freezer may still be cold. Check the back wall of the fridge section and the freezer for vents—they are usually small openings or slots. If you see ice buildup, use a plastic scraper or old credit card to gently remove it. Do not use a sharp knife, which can puncture the cooling lines inside the walls.

Also move any items stored directly in front of vents. Tall containers, boxes, or bags can block airflow without you realizing it. Once the vents are clear, wait a few hours and check whether cold air is flowing into the fridge section again. If the fridge is still warm but the freezer is cold, a blocked vent was likely the cause.

Vacuum the condenser coils to remove dust buildup

The condenser coils are the part of the refrigerator that releases heat to the outside air. They are usually located on the back of the unit or underneath it, behind a removable panel or grille. When dust and pet hair coat these coils, heat cannot escape, and the compressor overheats and shuts down as a safety measure. Cleaning the coils often restores cooling.

Unplug the refrigerator before you start. If the coils are on the back, pull the fridge away from the wall carefully and use a vacuum with a brush attachment to clean the coils and the area around them. If the coils are underneath, locate the front grille panel (usually held by clips or screws), remove it, and vacuum inside. You may see a drain pan under the coils—do not disturb it, but you can vacuum around it. After cleaning, plug the refrigerator back in and wait 30 minutes to see if the compressor starts running again.

Listen for compressor sounds and check for frost in the freezer

A working compressor makes a humming or buzzing sound that you can hear if you put your ear near the back of the fridge. If you hear nothing at all after a reset and the thermostat is set correctly, the compressor itself may have failed. This is a sign that professional repair or replacement is needed.

If the freezer is very frosty or icy but the fridge is warm, the problem is usually a blocked vent or a faulty defrost cycle rather than a failed compressor. The freezer stays cold because the compressor is running, but the cold air is not reaching the fridge section. In this case, clearing vents or having a technician check the defrost timer may solve the problem. If the freezer is also warm or thawing, the compressor has likely stopped working.

When to stop troubleshooting and call a technician

If you have unplugged the fridge, checked the thermostat, cleared the vents, and vacuumed the coils, but the compressor still does not run and the fridge remains warm, the problem is beyond a simple reset. A failed compressor, broken thermostat, or faulty control board requires replacement parts that most people cannot install themselves. At this point, calling a refrigerator repair technician is the practical choice.

Before you call, have your refrigerator's model number ready—it is usually on a sticker inside the fridge or on the back. The technician will use this to order the correct part and estimate repair costs. In some cases, if the fridge is very old or the repair cost is high, replacement may be more economical than repair.

Frequently Asked Questions

How long does it take for a refrigerator to cool down after a reset?

After you plug the fridge back in, the compressor usually starts within a few minutes. Once running, it takes 2 to 4 hours for the fridge section to reach its target temperature and 4 to 8 hours for the freezer to fully freeze. If the compressor runs but the fridge is still warm after 8 hours, a vent or coil issue is likely the cause.

Can a power outage cause a refrigerator to stop cooling?

Yes. After a power outage, plug the fridge back in and wait 30 minutes before opening it—the cold air inside will help it cool down faster. If the fridge still does not cool after 8 hours, the outage may have damaged the compressor or control board, and a technician should inspect it.

Is it safe to leave a warm refrigerator running while I troubleshoot?

Food safety depends on temperature. If the fridge is above 40 degrees Fahrenheit for more than 2 hours, bacteria can grow on perishable foods. If troubleshooting takes longer than that, move perishables to a cooler with ice or to a working fridge. Once the fridge cools back down, you can return the food.

What if only the fridge section is warm but the freezer is cold?

This almost always means a blocked vent between the freezer and fridge sections. Clear any ice or frost from the vents, move items away from the vent openings, and wait a few hours. If cold air still is not reaching the fridge, the defrost system or vent damper may need repair by a technician.

Do I need to replace my refrigerator if the compressor stops working?

Not necessarily. A compressor can be replaced, but the cost varies widely depending on the model and your location. Get a repair estimate before deciding. If the fridge is more than 10 years old, replacement may cost less than repair over time, but a newer fridge with a failed compressor is usually worth repairing.