There are several reasons why a refrigerator may not be cooling properly, including:

1. Dirty condenser coils: Cleaning the coils can help improve performance.The condenser coils are responsible for releasing heat from the refrigerant. If they become clogged with dirt and dust, it can reduce the efficiency of the refrigeration system and cause the fridge to stop cooling properly. Cleaning the coils regularly (at least once a year) can help prevent this issue.
2. Thermostat issues: The thermostat controls the temperature inside the fridge.The thermostat controls the temperature inside the refrigerator. If it’s not set to the right temperature or if it has become faulty, it can prevent the fridge from cooling properly. If the thermostat is not working, it may need to be replaced by a professional.
3. Evaporator fan problems: The evaporator fan circulates air inside the refrigerator and freezer, helping to maintain a consistent temperature. If the fan is not functioning correctly, the fridge will not cool efficiently and the temperature inside may become uneven. If the evaporator fan needs to be replaced, it’s best to call a professional.
4. Faulty compressor: The compressor is responsible for compressing and circulating the refrigerant through the refrigeration system. If the compressor is not working, the fridge will not cool properly. In this case, it’s best to call a professional for repairs.
5. Leaks in the refrigerant system: Refrigerant is the substance that is used to cool the refrigeration system. If there’s a leak in the system, the fridge will not cool properly and the refrigerant levels will become low. Leaks can be caused by damage to the refrigerant lines or to the components in the system. If you suspect a refrigerant leak, it’s best to call a professional for repairs, as handling refrigerants can be hazardous.

To remedy these issues, try the following steps:

1. Clean the condenser coils: Turn off the fridge, unplug it, and remove any debris from the coils using a brush or vacuum.
2. Check the thermostat: Make sure the thermostat is set to the right temperature and adjust it if necessary. If the thermostat is faulty, it may need to be replaced.
3. Check the evaporator fan: If the fan isn’t working, you may need to replace it.
4. Check the compressor: If the compressor isn’t working, you may need to call a repair technician.
5. Check for refrigerant leaks: If you suspect there’s a leak in the refrigerant system, call a repair technician to fix it.

If these remedies don’t resolve the issue, it’s best to call a professional for help. Improperly fixing a fridge can cause further damage and be potentially hazardous.

Here are some additional tips that can help you keep your refrigerator running smoothly:

1. Keep the door seals clean and tight: Over time, the door seals can become dirty or lose their shape, allowing cold air to escape. Clean the seals regularly with a mixture of warm water and dish soap, and make sure they are tight to the door.
2. Don’t overfill the fridge: Allowing too much food or drink to fill the fridge can impede air flow and prevent the unit from cooling properly. Make sure there’s enough space inside the fridge for air to circulate.
3. Allow hot food to cool before storing it: Putting hot food or drinks directly into the fridge can raise the temperature inside and make the unit work harder to cool the food. Let hot food cool to room temperature before storing it.
4. Keep the coils and vents clean: The coils and vents on the back of the fridge can also become clogged with dirt and dust, reducing the unit’s efficiency. Clean these areas regularly to help keep the fridge running smoothly.
5. Store food properly: Storing food in airtight containers can help prevent spoilage and keep the fridge from becoming overcrowded. Keeping food organized can also help ensure that air can circulate freely.
6. Check the temperature regularly: Regularly check the temperature inside the fridge and freezer to make sure they are set to the correct levels. If you notice that the temperature is too high or too low, adjust the thermostat accordingly.