Aircon Not Blowing Cold Air After Servicing? Reasons Why

Aircon Not Cold

You’ve just had your air conditioner serviced, expecting cooler and cleaner air — but instead, you notice it’s still not blowing cold air. This situation can be frustrating, especially in Singapore’s hot and humid weather where a working aircon isn’t just a luxury, but a necessity. If your aircon isn’t cooling properly even after servicing, it’s important to understand the possible reasons behind it.

In this article, we’ll explore the common causes and what you can do to fix the problem, with professional insights from LetsCool Aircon and Services, one of Singapore’s most trusted aircon specialists with more than years of experience in installation, servicing, and maintenance.

Daikin Aircon Servicing

Mitsubishi Aircon servicing

Midea Aircon servicing

Panasonic Aircon servicing

1. Residual Dirt or Dust After Basic Servicing

Regular aircon servicing usually includes cleaning the air filters, blower, and front panels. However, if your aircon was heavily clogged before servicing, a general cleaning may not be enough to remove deep-seated dirt and grime from the evaporator coil or blower wheel.

These internal components can still restrict airflow, making your aircon appear as if it’s not blowing cold air. In such cases, a chemical wash or chemical overhaul is often necessary to thoroughly clean the internal parts and restore cooling efficiency.

LetsCool Aircon and Services offers professional chemical overhaul services that effectively remove accumulated dirt, ensuring your unit delivers powerful, cold air once again.

Common Aircon Problems and Solutions:

• Aircon Not Cold

• Aircon Light Blinking?

• Daikin Aircon Light blinking

• Daikin Aircon Not cold

• Daikin Aircon Error Code

• Mitsubishi Aircon error code

• Panasonic Aircon Error code

• Midea Aircon Error code

• Midea Aircon Not cold

• Daikin Aircon not cold

• Daikin Aircon water leaking

• Aircon water Leaking

• Midea Aircon water leaking

2. Low or Leaking Refrigerant

One of the most common reasons why an aircon fails to blow cold air after servicing is low refrigerant gas levels. The refrigerant is the cooling agent that absorbs heat from your room and releases it outside. If there’s a leak or insufficient refrigerant, your aircon won’t be able to cool effectively.

Even after a regular service, if the technician didn’t inspect or top up the refrigerant, you may experience reduced cooling. Leaks can occur in the copper pipes, joints, or coils due to wear and tear.

Aircon Gas Top-up

Aircon Steam Cleaning

Professional tip: Always request your technician to check the gas pressure and inspect for potential leaks during servicing. The trained team at LetsCool Aircon and Services uses advanced tools to detect leaks and ensure the correct refrigerant levels for optimal cooling.

3. Faulty Thermostat or Sensor Issues

Sometimes, the problem isn’t with the aircon’s cooling system but with its thermostat or sensor. If the thermostat is malfunctioning, it may incorrectly detect the room temperature and prevent the compressor from running.

A technician might clean or reset your unit during servicing, but if the thermostat is defective, it will still affect cooling performance.

LetsCool Aircon and Services technicians are trained to diagnose electronic control issues like faulty sensors and thermostats, ensuring your aircon maintains accurate temperature settings for consistent cooling.

Aircon spare parts

Annual Service Contract

4. Blocked or Damaged Condenser Unit

Your outdoor condenser unit plays a key role in releasing heat absorbed from your room. If the condenser coils are dirty, blocked by debris, or damaged, the heat transfer process is disrupted, resulting in weak or warm airflow.

In Singapore’s climate, outdoor units can easily get clogged with dust, leaves, or even bird nests. During standard servicing, indoor units are usually prioritized, and sometimes outdoor units require additional cleaning or inspection.

If your aircon still isn’t cooling after a regular service, LetsCool Aircon and Services can perform a full system check that includes both indoor and outdoor units to identify and resolve such issues.

Aircon Repair

5. Electrical or Compressor Problems

The compressor is the heart of your air conditioning system — it compresses refrigerant and enables cooling. If it’s faulty or not receiving power, your aircon may run but won’t blow cold air.

Electrical issues, such as loose wiring or faulty capacitors, can also interfere with the compressor’s operation. These problems often go unnoticed during basic cleaning services.

LetsCool Aircon and Services employs experienced technicians who can perform diagnostic tests to identify electrical or compressor faults safely and efficiently, restoring your system’s cooling ability.

6. Incorrect Aircon Settings After Servicing

Sometimes, the reason is simpler than you think — your aircon’s settings might have been changed during servicing. For instance, the "fan mode" circulates air without cooling it, while the "dry mode" reduces humidity but doesn’t significantly lower temperature.

Always check your remote control settings after servicing to ensure the aircon is in "cool mode" with the desired temperature set (typically around 24°C–26°C for optimal comfort).

If you’re unsure, the experts at LetsCool Aircon and Services can guide you on the correct usage and energy-efficient settings for your specific aircon model.

7. Dirty Air Filters Again Too Soon

In Singapore’s dusty and humid environment, air filters can get dirty surprisingly quickly — sometimes within just a few weeks after cleaning. A clogged filter reduces airflow, making the aircon feel less cold even though the system is working fine.

Maintenance tip: Clean your filters every 2–3 weeks, especially during heavy usage periods. For long-term convenience, LetsCool Aircon and Services offers quarterly maintenance plans to keep your aircon consistently clean and efficient.

8. When to Call a Professional Technician

If you’ve checked all basic settings and your aircon is still not cooling, it’s best to call a professional. Trying to fix refrigerant leaks or electrical faults on your own can be dangerous and may void your aircon’s warranty.

Aircon Installation

LetsCool Aircon and Services provides professional aircon repair and diagnostic services across Singapore. Their technicians are trained to handle all major brands, including Mitsubishi Electric, Mitsubishi heavy, Daikin, Panasonic, Midea, Hitachi, York, Toshiba, Haier, and Sharp, ensuring a reliable and long-term solution to your cooling issues.

Conclusion

It can be worrying when your aircon isn’t blowing cold air after servicing — but the problem doesn’t always mean something serious. Sometimes, it’s just a matter of deeper cleaning, refrigerant refilling, or checking component issues.

For fast, reliable, and professional help, LetsCool Aircon and Services is your go-to aircon expert in Singapore. With more than years of industry experience, they provide top-quality aircon servicing, repair, and installation for residential and commercial units.

If your aircon still isn’t cooling after servicing, contact LetsCool Aircon and Services at +65 9862 3678 for a free consultation or site survey. Their trusted team will get your aircon back to delivering cool, refreshing air — just the way it should.

11 Mandai Estate,

#05-15 Eldix,

Singapore 729908

Mail ID: info@letscoolaircon.com.sg

Service - Call: +65 9862 3678 (or) WhatsApp us: https://wa.me/6598623678

Installation - Call: +65 94507178 (or) Whats App us: https://wa.me/6594507178

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A passionate content writer specializing in HVAC and home improvement topics. With a focus on delivering practical tips and reliable insights, this author aims to help readers understand air conditioning systems better, ensuring comfort, energy effic