How does an AC make cold air?
Likewise, is AC just for cold air?
Your air conditioner does not “create” cold air, it removes heat from warm air. Your air conditioner has three main mechanical components to cool your home: a compressor (a pump that pressurizes the refrigerant) an evaporator coil (inside cold coil)
Beside this, does AC give fresh air?
Most Spilt or Window Air-Conditioners doesn't have any fresh air intake at all! These Air-Conditioners does have a purification system but it's only to purify contaminants in the air by means of filters, it doesn't make air any fresh (means no addition of oxygen).
The most common cause of window air conditioners not blowing cold air is a lack of adequate air flow. If the air filter is dirty or clogged, there may be little or no air flow over the evaporator coils, which may cause them to become too cold and frost or ice can form on them, restricting the air flow even more.