Defrost the fridge with the fridge unplugged or breaker off, all doors open, for 24 hours. Place towels in the freezer near the bottom so any frost or ice that melts will not go onto your floor. After a full 24 hours, you can plug in the fridge, and see if the problem returns. It could take about 2-3 weeks to return.
Hot food or too much fresh food is placed in the fridge before cooling. Try to avoid placing warm or hot food straight into the fridge as this can change the inside temperature and lead to ice within the fridge.
Basically removing all your food, unplugging the unit, allowing all the frost to melt and then drying out the compartment. Plugging it back in, allowing it to cool down and then restocking it with your food.
Fridge temperature settings are generally numbered from 1 to 5, with 5 being the coldest. A fully stocked fridge may need to be set to a higher setting (around 3 or 4), whereas one with more space is best suited to temperature setting 2 or 3.
Based on these two factors here's the number your fridge should be set on: If you're always storing plenty of food you need the colder settings (3 to 4). If you're not storing as much choose between 2 and 3. If the temperature is very low, ice will form and it may prevent air circulation.
BLOCKED AIR VENT
Air vents in the refrigerator are typically found on the back wall and help circulate air to help keep the temperature consistent throughout the fridge. You may notice food freezing toward the back of the refrigerator if items are blocking this air vent.
Cleaning Defrost Drain Tube
You can flush out the drain hole with a solution made of 1 tablespoon of baking soda and 2 cups of hot tap water. Use a meat/turkey (bulb) baster to squeeze the solution into the drain hole and flush out the drain tube. When clear, you will hear water running down into the drain pan below.
Moisture forms in the fridge when warm air enters through a door being left open, warm or hot items stored inside, or compartments not sealing properly. When moisture freezes, it becomes frost.
Make sure that both the freezer and refrigerator are 1/2 to 3/4 full. The refrigerator will not cool properly when empty. Make sure that the condenser coils are not covered with dust. You can clean the coils easily with a rag or vacuum cleaner with a brush attachment.
While it is normal to find a small amount of water or ice on the back of your fridge, it is not normal for there to be large amounts of frost/ice build-up inside your appliance. If you are finding that your fridge is densely covered in ice, follow the below steps to try and resolve the issue.
If your refrigerator temperature is too high, condensation may build up and freeze on the bottom of the refrigerator.
It is commonly mentioned as "defrost" or "defrost control." Continue pressing and holding the button for a few seconds, or until you get a buzzing sound or notice the indicator light turning off. This means that the defrost function has been disabled.
Cause: Air vents in your fridge help circulate cold air. If they're blocked, the cold air can't move around, causing some areas to freeze. Fix: Clear any obstructions around the vents and rearrange items inside the fridge to allow for better airflow. Regularly clean the vents to prevent dust and debris buildup.
Melt away ice crystals on-the-fly with hot, sudsy water and a cleaning cloth. Don't feel like defrosting your entire refrigerator? Saturate a cleaning cloth or sponge with hot, sudsy water, holding the damp cloth directly on top of any ice buildup or frost. Press down on it gently to warm up the ice below.
The Department of Agriculture states bacteria multiply quickly in the "Danger Zone," which is temperatures beginning at 40°F (4.5°C). It's best to set your temperature gauge a few degrees below that. Most experts recommend that the ideal temperature setting for a refrigerator is between 35-38°F (1.6-3.3°C).
Check the defrost drain for any clogs or blockages. A clogged defrost drain can cause water to accumulate and freeze, leading to excessive coldness in the fridge compartment. Clear any debris or ice buildup from the defrost drain using a turkey baster or pipe cleaner.