The Important Air Conditioner Parts – Common Problems & Maintenance Tips

We all know how important it is to have a working air conditioner during the hot weather in Malaysia, especially from May to September each year. But do you know what the most critical parts of your AC are? Do you know what can cause problems with your AC and how to prevent them?

In this blog post, our PG1 Aircond team will take a closer look at 5 core components and explain what it does. We will also discuss how to take care of each part so that your air conditioner can run at its best without the need to spend much to repair them.

How AC Works?

Key Parts of an Air conditioner 

While there are over 10 major parts of an air conditioner, we will cover here the most important ones you need to know, as they are essential for the overall performance of your AC.

  • Compressor: The compressor is the heart of the air conditioner. It pumps refrigerant through the system and is responsible for circulating cool air throughout your home or office. 
  • Condenser: The condenser is a coil of tubing that helps to cool the refrigerant before entering the evaporator. 
  • Evaporator: The evaporator is a coil of tubing that contains the refrigerant. As the refrigerant passes through the coil, it absorbs heat from the surrounding air, causing the air to become cool. 
  • Thermostat: The thermostat is responsible for regulating the temperature of your air conditioner. It turns the unit on or off as needed to maintain a comfortable temperature.  
  • Air filter:  The air filter helps to remove impurities from the air, such as dust, pollen, and pet dander.  

Common Problems with Air Conditioners 

While air conditioners are designed to last for many years, they can sometimes experience problems. Here are some of the most common issues that people have with their air conditioners:

  • The compressor fails: The compressor is the most important part of the air conditioner, so the entire unit will need to be replaced if it fails. 
  • The condenser coils become dirty: Over time, dirt and debris can build up on the condenser coils, preventing them from properly cooling the refrigerant. This can cause the air conditioner to overheat and eventually break down. 
  • The evaporator coils become frozen: If the evaporator coils become frozen, they will be unable to absorb heat from the surrounding air. This can cause the air conditioner to blow out warm air instead of cool air. 
  • The thermostat breaks: If the thermostat breaks, it will no longer be able to regulate your air conditioner’s temperature accurately. As a result, the unit will either run too often or not often enough, leading to inefficient operation and higher energy bills. 
  • The air filter gets clogged: A clogged air filter can restrict airflow to the point where it negatively impacts the performance of your air conditioner. It can even cause the unit to overheat and shut down in some cases. 

How To Properly Take Care Of Each Part 

Should you encounter problems with each of these air conditioner parts, here are the basic steps on how to address them. 

  • Compressor: The compressor is a vital part of the air conditioner, so it is important to take care of it. To do this, you should regularly check the compressor for any signs of wear or damage. If you notice anything wrong with the compressor, you should have it repaired or replaced as soon as possible. 
  • Condenser: The condenser helps cool the refrigerant before entering the evaporator. To keep the condenser in good working condition, you should regularly clean it and make sure that nothing is blocking the airflow around it. 
  • Evaporator: The evaporator is responsible for cooling the air in your home or office. To keep it running efficiently, you should regularly clean the coils and make sure that nothing is blocking the airflow around them. 
  • Thermostat: The thermostat is responsible for regulating the temperature of your air conditioner. It would be best to regularly calibrate it to ensure accuracy and keep it working correctly. It would be best if you also replaced the batteries in the thermostat every year to prevent them from running out of power.

By following these simple tips, you can help to extend the life of your air conditioner and keep it running at its best.


An air conditioner is a complex appliance that is made up of many different parts. Each part has its own function and purpose. By learning about each part, you can better understand how your air conditioner works and how to take care of it properly.

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