What Is Sleep Mode In Air Conditioners? – Is It Really Beneficial For Us?

Have you recently discovered or heard about one of the air conditioner features called “Sleep Mode”? So, don’t misjudge it with the sleep mode available on your personal computer or laptop. As it is completely different from that.

Apart from that if you have recently bought an air conditioner and found this mode in your new AC. And now you want to know about like “What it is?” & “How it works?”. Then do not worry because this guide will clear all your doubts, just keep reading.

Let’s understand like where sleep mode in AC come into place to help you out. Imagine, you set your room to a cool temperature before bedtime. But as the night goes on, it gets colder outside, and you don’t need the AC to work as hard. In this situation, not only waste your air conditioner cooling but also consumes high energy all night, which will cost you dearly in the long term.

As demand for air conditioners is increasing rapidly in India. But still, we can call it a luxury for many people in the country, but this also not ignorable that the intensity of heat in summer is increasing every year, Due to this people are embracing the change, be it voluntarily or out of compulsion. And one of the major reasons people are preferring to buy an AC over other options is effective cooling in less time.

Now let’s come to the main point for which you’ve come to this article. The sleep mode is one of the great examples of advancements in technology in the HVAC sector. This functionality in air conditioners is proved quite useful and convenient to human life. Let’s start discussing it in more detail further.

What Is Sleep Mode In Air Conditioners?

white remote with display next to a black remote

Sleep mode, also known as “Night Mode” or “Sleep Timer,” is a feature found in many modern air conditioners. When activated, this mode adjusts the cooling (or heating) settings to create a comfortable environment for sleeping while optimizing energy consumption during the night. Sleep mode is designed to provide a more restful sleep experience by gradually adjusting the temperature and airflow throughout the night.

How Does Sleep Mode Works In Air Conditioner?

Sleep mode is a simple yet one of the most useful features that come in modern air conditioners. You will find this mode in both Windows as well as Split air conditioners.

In window air conditioners, you can access sleep mode in two ways. One on the PCB panel of the AC at the front and the second on its remote control. On the other hand, in Split air conditioners you will only find sleep mode on its remote control as there is no panel provided on the internal unit of a split AC.

When it comes to “how it works”, then it simply controls the temperature of your air conditioner throughout the entire night. It increases the temperature of the AC every hour spent by (0.5 – 1 degrees), up to a maximum of 3 degrees per hour.

Let’s understand it with the help of an example, suppose you have set the temperature to 20°C and set the timer to 8 hours. In this setting, it will gradually increase the temperature every hour let’s say to 1°C till 8 hours. After the completion of 8 hours, when you wake up you will find that your AC is set to a temperature of 28°C in the morning.

So, this is how sleep mode works in an air conditioner.

The specific behavior and options of Sleep mode may vary depending on the brand and model of the air conditioner. Some advanced AC units may come with additional features like humidity control and smart sleep modes that adjust cooling based on the room’s temperature and occupancy.

Sleep mode is beneficial for both improving sleep quality and energy efficiency. By providing optimal comfort during the night and conserving energy, it can help create a more relaxing and cost-effective cooling experience.

Benefits Of Sleep Mode In Air Conditioner?

Sleep mode offers several benefits, which I have jotted in power points instead of a long paragraph to understand them better for you. Let’s discuss them quickly one by one down below.

  1. Energy Savings: One of the primary benefits of sleep mode is energy conservation. Sleep mode is designed to use less energy compared to regular cooling modes. It gradually adjusts the temperature, reduces cooling output, and minimizes the AC’s overall power consumption. This can lead to significant savings on your electricity bills.

  2. Optimal Comfort: Sleep mode is tailored to provide optimal comfort during sleep. It adjusts the temperature settings to create a more suitable sleeping environment, promoting a restful night’s sleep.

  3. Quiet Operation: Sleep mode often lowers the fan speed, resulting in quieter operation. This reduced noise level ensures a peaceful sleeping environment without disturbances.

  4. Prevents Overcooling: As outdoor temperatures drop during the night, the AC might end up overcooling the room if left at the same setting. Sleep mode prevents this by gradually adjusting the temperature, avoiding excessive cooling.

  5. Ease of Use: Sleep mode simplifies the process of creating a comfortable sleep environment. You don’t need to manually adjust the temperature or fan settings before sleeping; the AC does it for you.

  6. Reduced Wear and Tear: By operating at a lower capacity, the AC experiences less wear and tear during sleep mode. This can extend the lifespan of the AC unit and reduce the need for maintenance.

  7. Customization: Many air conditioners with sleep mode allow you to customize the duration and settings. This flexibility lets you tailor the sleep mode to your preferences and sleep schedule.

  8. Environmental Impact: Less energy consumption means a reduced carbon footprint. Using sleep mode helps conserve energy resources and contributes to environmental sustainability.

  9. Quick Comfort in the Morning: Sleep mode typically has a timer feature that can bring the AC back to its regular cooling mode just before you wake up. This ensures you wake up to a comfortably cooled room without any delay.

  10. Temperature Consistency: Sleep mode’s gradual temperature adjustments help maintain a consistent and comfortable sleeping environment throughout the night.

  11. Convenient: Once activated, sleep mode requires minimal interaction. It’s a hassle-free way to enjoy energy-efficient cooling while you sleep.

While sleep mode offers numerous benefits, it’s essential to strike a balance between its advantages and potential drawbacks. So, let’s discuss them as well.

Drawbacks Of Sleep Mode In Air Conditioner?

However, sleep mode in an air conditioner (AC) offers many benefits, it’s important to consider potential drawbacks too. Here are some of the drawbacks associated with using sleep mode in an AC.

  1. Temperature Fluctuations: In sleep mode, the AC may gradually increase the set temperature, which could lead to temperature fluctuations during the night. Some people may find this uncomfortable, especially if they are sensitive to changes in room temperature while sleeping.

  2. Inaccurate Comfort: The AC’s temperature adjustments in sleep mode are based on assumptions about ideal sleeping conditions. However, individual preferences vary, and the preset temperature changes may not align with everyone’s comfort level.

  3. Limited Customization: Sleep mode settings are often predefined and may not allow for fine-tuning to match specific preferences. This lack of customization can be a drawback for individuals who prefer more control over their AC’s operation.

  4. Limited Functionality: Sleep mode may disable or limit certain features of the AC, such as dehumidification or air purification. This could affect indoor air quality and overall comfort.

  5. Maintenance Considerations: Extended use of sleep mode might result in reduced airflow through the AC system. Over time, this could lead to dust accumulation and decreased efficiency, necessitating more frequent maintenance.

  6. Technical Issues: Some AC models might experience technical glitches when transitioning between sleep mode and regular operation, potentially affecting their performance or reliability.

  7. Temperature Control: If the external temperature significantly drops during the night, the AC might not need to operate in sleep mode. In such cases, the AC could end up cooling the room excessively, leading to discomfort or unnecessary energy usage.

  8. User Preference: Ultimately, sleep mode might not align with everyone’s personal preferences for cooling during sleep. Some individuals may prefer to manually set their AC’s temperature and fan speed to create their ideal sleep environment.

It’s important to note that the drawbacks of sleep mode can vary based on the specific AC model and the preferences of the user. Before using sleep mode, it’s a good idea to familiarize yourself with your AC’s manual and experiment with different settings to find the balance between energy savings and comfort that works best for you.

Whom Sleep Mode Is Not For?

The sleep mode is not suitable for people having sensitive sleep or sensitivity to temperature change. People with sensitive sleep can feel uncomfortable due to changes in temperature during the night.

This issue is mostly seen in old age people. So if you are buying an AC for your grandparents or aged parents, don’t consider an AC with sleep mode. 

Apart from this, overall it is a must-have and quite useful feature for people who do not have such issues. It provides the perfect temperature at night by which you don’t only get sound sleep but it also reduce its power consumption. Hence, you will save a lot of your money on your electricity bills in the long run.


In conclusion, the sleep mode is a valuable feature that not only promotes comfortable sleep but also offers economic and environmental benefits by optimizing energy usage. One should definitely look for this feature in their new air conditioner.

It’s a smart way to make the most of your air conditioner while ensuring a restful night for you and your loved ones. However, if you are temperature sensitive, then it might affect your sleep. Apart from these minor flaws, this feature is very useful for comfortable sleep at night.

I hope through this article your doubts would have been cleared. If you have any suggestions regarding this topic, then do let us know in the comments below.


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Hey Guys, I'm Jatin, founder of (allaboutrefrigerators.in). A blog where you will find unbiased & authentic reviews and information about refrigerators or fridges with their Buyer's Guide. If I talk about myself, I love to read, watch & give reviews about stuff like technology & appliances. Therefore, I started this blog, on a particular topic or niche. I hope you will like my content. Cheers!

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