Yes, a mini fridge can make your room slightly hotter.
Mini fridges, like all refrigerators, work by removing heat from the inside and releasing it outside through the back or bottom of the fridge. This heat exchange process is necessary for the fridge to cool down the items inside. As a result, the heat that is removed from the inside of the fridge is expelled into the surrounding environment, which includes your room.
While the amount of heat released by a mini fridge is relatively small compared to larger household appliances like air conditioners or heaters, it can still contribute to a slight increase in room temperature, especially if the fridge runs continuously or in a poorly ventilated space.
In small spaces or during hot weather, you might notice a slight difference in room temperature when a mini fridge is running. To mitigate this effect, you can ensure that the room is well-ventilated, and the fridge's coils and vents are clean and unobstructed, allowing it to dissipate heat more efficiently. Additionally, placing the mini fridge in a cooler area of the room or using a small fan to improve air circulation can also help reduce its impact on the room temperature.