If you turn on the air conditioner but don't set it to cool, it will depend on the specific settings of the air conditioner and the model you are using. Generally, there are a few possibilities of what might happen:
Fan Mode: Many air conditioners have a "Fan" mode, which runs the fan without cooling the air. In this mode, the air conditioner will circulate air throughout the room without lowering the temperature. This can be useful if you want to improve air circulation or create a gentle breeze without actually cooling the space.
Auto Mode: Some air conditioners have an "Auto" mode, where the unit will automatically adjust the temperature and fan speed based on the current ambient conditions. If the room temperature is already lower than the set temperature, the air conditioner might only run the fan to maintain the desired temperature.
Off: Depending on the air conditioner's design, it may have an "Off" setting or switch, where no cooling or fan operation occurs, and the unit is completely turned off.
Default Settings: Some air conditioners might have default settings that activate the cooling function automatically when the unit is turned on. In this case, the air conditioner will start cooling the air even if you haven't explicitly set it to do so.
To know exactly how your specific air conditioner behaves in this situation, it's essential to consult the user manual or check the manufacturer's guidelines. The user manual will provide you with detailed information on the different modes and settings available on your particular air conditioner model.