it is the compressor because it is a working machine ............... :P
Keeping hot food in the refrigerator will make the food cold. It will not damage your refrigerator.
Thermal energy never disappears, but it can be moved from one place to another, which is what a refrigerator does. If you examine your refrigerator you will be able to observe that there are heat exchange tubes (usually on the back) which get hot as they pump heat from the interior to the exterior of the refrigerator.
A refrigerator that's working normally becomes cold on the inside and hot on at least part of the outside, usually somewhere in the back. The refrigerator's job is to remove heat from the inside, where the food is stored. When it does that, it must do something with the heat. It's usually built to dissipate that heat from a series of tubes mounted on the back. If it is hot inside the compartment, it is likely that the gas has leaked away and the compressor running hot as a result.
Gases in a refrigerator are used to transfer heat from the inside to the outside of the refrigerator. When the gas is compressed, it becomes hot, and when it expands, it cools down. This process allows the gas to absorb heat from inside the refrigerator, keeping the contents cool.
It depends COMPLETELY on the temperature (and humidity to a lesser extent) outside the refrigerator. If the ambient temp is below - say 40 degrees - the inside temp of the refrigerator, then it need not be on at all. If its hot enough than it won't be able to stay cool inside even if it runs continually.
No, a refrigerator does not change heat into cold. It removes heat from inside the refrigerator and releases it outside, resulting in the cooling effect inside the refrigerator.
A refrigerator generates heat as it works to cool the air inside, which can contribute to warming up the room. Additionally, the heat generated as the refrigerator motor operates can raise the overall temperature in the room. Proper ventilation and placement of the refrigerator can help moderate the temperature.
Inside
The condenser on your freezer is hot because it is releasing the heat that has been transferred from inside the freezer to the surrounding air. This is a normal part of the refrigeration process and helps maintain the cold temperature inside the freezer.
If the side of the refrigerator is burning hot, its motor may be overheating. First check that the cooling fan is working properly and that the refrigerator is properly ventilated. Sometimes if a refrigerator is jammed against a wall, it can overheat. Then, check around the refrigerator for the smell of something burning and for unusual sounds (as if a part has come loose). Call a repair service immediately. If everything is ok, perhaps your refrigerator is overloaded. Consider reducing the coldness of both the refrigerator and freezer sections, and do not place hot items inside. However, bear in mind that a well-stored refrigerator takes less energy to keep cool than an empty one, because the contents act as insulators and reduce the air space inside.
The fact that hot water may freeze faster than cold is often called the Mpemba effect
Heat exchange pipes in a refrigerator are responsible for transferring heat from the inside of the refrigerator to the outside environment, allowing the refrigerator to maintain a cool temperature inside. The pipes contain a refrigerant that absorbs heat as it evaporates inside the refrigerator and releases it as it condenses outside. This process helps in cooling the interior of the refrigerator.