Posted on Aug 24, 2026 by Sayasai

Aircon not Cold

An aircon that is running but not producing enough cold air can be frustrating, especially in Singapore’s warm and humid climate. The time required to fix an aircon that is not cold depends on the actual cause of the problem. A simple issue such as a dirty filter may take only a short time to resolve, while refrigerant leaks, electrical faults, or compressor problems may require more detailed inspection and repair.

If your aircon is not cold, understanding the possible causes can help you know what to expect when arranging professional aircon servicing.

1. Simple Cleaning Problems

One of the quickest problems to resolve is restricted airflow caused by dirty filters. Dust and dirt can reduce airflow and prevent the aircon from cooling effectively. Cleaning the filters and other accessible components may restore normal cooling.

For a basic aircon general servicing, the technician can inspect and clean the unit, check its operation, and identify whether additional work is required. The actual duration depends on the number of indoor units and their condition.

Read More: Aircon Turning Off Frequently? Here's How to Fix It

2. Blocked Coils or Dirty Fan Coil

If the aircon has not been serviced for a long time, dust and dirt can accumulate on the evaporator coil and blower fan. This can significantly reduce cooling performance.

A standard cleaning may be enough for moderate dirt. However, heavily contaminated units may require an aircon chemical wash. Chemical cleaning provides a deeper clean and can help improve airflow and cooling performance.

If the internal components are extremely dirty or clogged, an aircon chemical overhaul may be recommended. Because this involves more extensive cleaning and dismantling, it normally takes longer than routine servicing.

3. Low Refrigerant or Gas Leak

Low refrigerant is another common reason an aircon may not be cold. If the refrigerant level is low, the technician should check the system rather than simply adding gas without investigating the cause.

An aircon gas top up can be relatively quick when there is no significant leak. However, if a refrigerant leak is discovered, the technician may need additional time to locate and repair the leak before recharging the system.

This is why the time required for an aircon not cold problem can vary considerably from one situation to another.

4. Electrical or Component Problems

Sometimes the issue is not related to cleaning or refrigerant. Faulty sensors, capacitors, circuit boards, motors, or other components can affect cooling performance.

A technician will usually diagnose the system first before recommending a repair. Minor component replacement may be completed relatively quickly if the required aircon spare parts are available. More complicated electrical problems may require additional troubleshooting or parts.

Professional aircon repair singapore services can help determine whether the problem can be repaired immediately or requires a follow-up visit.

5. Compressor Problems

The compressor is one of the most important components of an air-conditioning system. If the compressor is faulty, the aircon may run without providing sufficient cooling.

Compressor-related problems usually require more detailed diagnosis than routine servicing. Depending on the condition, the technician may recommend compressor servicing, component repair, or replacement.

The repair time can therefore vary depending on the model, fault, availability of parts, and overall condition of the system.

6. When Should You Call a Professional?

If your aircon remains warm after cleaning the filter, it is better to have the system inspected by a qualified technician. Continuing to operate an aircon with an unresolved fault can sometimes worsen the problem or increase energy consumption.

Professional technicians can check airflow, drainage, refrigerant condition, electrical components, coils, and other important parts to determine why the unit is not cooling properly.

Choose LetsCool Aircon for Aircon Problems in Singapore

LetsCool Aircon provides professional aircon servicing and repair solutions for homes, offices, HDB flats, condos, and commercial properties in Singapore. Whether your aircon needs general servicing, an aircon chemical wash, an aircon chemical overhaul, an aircon gas top up, or aircon repair singapore services, proper diagnosis is important before carrying out the work.

The company can also assist with aircon installation singapore requirements and ongoing maintenance to help keep your cooling system operating efficiently.

Conclusion

So, how long does it take to fix an aircon that is not cold? There is no fixed time because the repair depends entirely on the cause. Simple cleaning issues can usually be addressed quickly, while refrigerant leaks, electrical faults, compressor problems, or major component failures may require more time.

If your aircon is running but not cooling, do not ignore the warning signs. Professional inspection can identify the problem and help restore comfortable cooling as efficiently as possible.

Aircon servicing Singapore

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11 Mandai Estate,

 #05-15 Eldix,

Singapore 729908

Mail ID: info@letscoolaircon.com.sg

Service -WhatsApp Call: +65 9862 3678 

Installation - WhatsApp Call: +65 94507178 

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