1. **Power On**: Turn on the air conditioner using the power button on the unit or remote control.
2. **Select Mode**: Choose the desired mode (cool, heat, fan, or auto) using the mode button. For cooling, select the "Cool" mode.
3. **Adjust Temperature**: Use the temperature control buttons, usually marked with "+" and "-", to set your desired temperature. Some units may have a dial or touch screen for this purpose.
4. **Fan Speed**: Set the fan speed (low, medium, high, or auto) to control airflow. This can usually be adjusted with a fan speed button.
5. **Use Remote Control**: If your unit has a remote, you can perform all these functions from a distance. Ensure the remote has working batteries and is pointed at the unit.
6. **Smart Features**: If your air conditioner is smart-enabled, you can use a smartphone app to set the temperature and other settings remotely.
7. **Thermostat Setting**: Ensure the thermostat is set to the desired temperature. The air conditioner will maintain this temperature by cycling on and off.
8. **Energy-Saving Mode**: Some units have an energy-saving or eco mode that automatically adjusts the temperature for efficiency.
9. **Timer Function**: Use the timer to schedule when the air conditioner turns on or off, helping maintain the desired temperature at specific times.
10. **Check Manual**: Refer to the user manual for specific instructions related to your model, as controls can vary.
11. **Troubleshooting**: If the temperature doesn’t adjust, check for issues like blocked vents, dirty filters, or malfunctioning components.
12. **Professional Help**: If problems persist, consult a professional technician.