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aircon not cooling

Diagnosing the Chill: 7 Reasons Why Your Aircon Isn’t Cooling

When summer’s hot, blazing heat arrives, a malfunctioning aircon can turn your living space into an uncomfortable oven. Suppose you are facing issues like the aircon not cooling, the aircon spreading foul air, the aircon heating the room instead of cooling, or the aircon thermostat not working correctly. In that case, you need to read this article to the end to find a solution to your problem. 

Understanding why your air conditioner fails to provide the comfort you expect is crucial for effective troubleshooting. In this detailed article, we’ll discuss seven common culprits that may be responsible for your aircon not cooling as it should. By identifying these issues, you can take the suggested steps toward restoring your cooling system’s efficiency, ensuring a refreshed and comfortable indoor environment.

How to Fix Aircon Not Cooling?

It is the most critical question about aircon because homeowners are in trouble if they stop cooling their rooms. If you feel your aircon is not as cold as it should make the room be, you need to go through the following steps:

Dirty or Clogged Air Filters

Dirty or clogged air filters are one of the simplest yet most impactful factors contributing to reduced cooling efficiency. Over time, these filters become clogged with dust and debris, disturbing airflow and hindering the system’s ability to cool effectively. 

Regular inspection and replacement of air filters, ideally every 1-3 months, depending on usage, are unavoidable. This routine maintenance task significantly improves airflow and enhances overall system efficiency. The cleaner the air filters, the better your aircon can perform its cooling duties, ensuring a more comfortable and healthier indoor climate.

Refrigerant Issues

If you feel your aircon not blowing cold air as it should, the low refrigerant level may be the culprit. Optimal refrigerant levels are crucial for the efficient functioning of your aircon. If the system is low on refrigerant or has a leak, it will have to work harder to remove heat from the indoor air effectively. 

It’s important to note that dealing with refrigerant-related issues requires professional assistance. If you notice signs such as ice formation on the evaporator coil, it indicates a potential refrigerant problem. Hire a professional inspector to identify and address refrigerant issues, ensuring your system can cool your home efficiently and effectively.

Faulty Thermostat

A malfunctioning thermostat can massively affect your air conditioner’s cooling capabilities. If the thermostat fails to sense the indoor temperature accurately, it may not signal the aircon to cool as required. Begin by inspecting the thermostat settings and recalibrating or replacing them if needed. 

Upgrading to a programmable thermostat is also a futuristic choice, offering advanced temperature control and energy efficiency. A well-functioning thermostat is fundamental to an adequately regulated cooling system, allowing you to keep the ideal indoor temperature easily.

why my aircon isn't not cooling

Blocked or Dirty Condenser Coils

When you notice the aircon not cooling as it should, the condenser coils can be the reason. The condenser coils in the outdoor unit play a pivotal role in the heat exchange process. If these coils are dirty or accumulated with debris, the efficiency of the heat exchange could be improved, leading to limited cooling performance. 

Routine maintenance includes cleaning the condenser coils and clearing vegetation or debris around the outdoor unit. This simple yet essential task promotes optimal heat exchange, ensuring your aircon can efficiently cool your space even during the hottest summer days.

Issues with the Compressor

Often known as the heart of the aircon system, the compressor is responsible for pressurizing the refrigerant and facilitating heat exchange. The cooling process is compromised if the compressor does not function properly. Common issues include electrical problems, motor failures, or overheating. 

Locating compressor problems requires professional expertise, and hiring a technician for a thorough inspection is crucial. They can recommend and carry out compressor replacement, restoring your system’s ability to cool your home effectively.

Inadequate Insulation or Leaks in Ductwork

The efficiency of your aircon can be affected by inadequate insulation or leaks in the ductwork. Poor insulation allows cool air to escape, while duct leaks can lead to conditioned air going to waste. Assess the insulation in your home and inspect the ductwork for any visible leaks. 

Sealing these leaks and improving insulation not only enhances cooling efficiency but also contributes to energy savings. A properly insulated and sealed home ensures your aircon operates efficiently, providing consistent and economical cooling throughout the warmest months.

aircon not cold

Electronic Control Failure

Modern aircons rely heavily on electronic controls to regulate temperature and system functions. If these controls malfunction, the unit may not cool as expected. Check the control panel for any signs of damage or malfunction. In case of electronic control issues, hiring professional assistance is crucial. 

Trained technicians can diagnose, repair, or replace faulty components, ensuring your aircon’s electronic controls operate seamlessly. Routine maintenance checks can help identify potential electronic control issues before they increase, contributing to the longevity and reliability of your cooling system.


In conclusion, when you feel your aircon not cooling as you expect it to, there are some issues. Regular maintenance, prompt identification of problems, and professional assistance, when needed, are essential for ensuring your aircon system operates at peak efficiency. By resolving these factors, you restore cooling performance and contribute to the longevity and reliability of your aircon unit. Stay relaxed and comfortable by staying informed about your aircon’s needs and taking proactive steps to maintain its optimal functionality.