No, setting the air conditioner to a temperature lower than the desired value will not cool down a room faster. The cooling rate of an air conditioner is primarily determined by its capacity and the temperature difference between the desired temperature and the current room temperature.
When you set the air conditioner to a lower temperature, it simply means you are adjusting the desired temperature that you want the room to reach. However, the air conditioner will cool the room at its maximum cooling capacity, regardless of the desired temperature setting.
The time it takes for a room to cool down depends on factors such as the size of the room, the insulation of the room, the efficiency of the air conditioner, and the temperature difference between the inside and outside of the room.
Setting the air conditioner to a lower temperature than necessary can actually lead to energy waste. The air conditioner will continue to operate until it reaches the lower set temperature, which means it will run for a longer duration and consume more energy than needed. It is more efficient to set the air conditioner to the desired temperature that provides comfort without overcooling the room.
Additionally, it's worth noting that an air conditioner doesn't instantly cool down a room; it gradually lowers the temperature by removing heat from the air over time. Patience is required for the cooling process, regardless of the temperature setting.