Why Does Your Aircon Freeze Up?

By Author: kewot81803
Total Articles: 6
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Aircon Repair
Air conditioning is a must-have in Singapore’s hot and humid weather. But what happens when your aircon suddenly stops cooling and you notice ice forming on the unit? A frozen aircon is a common issue that can affect performance, increase electricity bills, and even damage the system if not addressed quickly. Understanding why your aircon freezes up can help you prevent future breakdowns and keep your home cool and comfortable.
In this article, we’ll explore the main causes of aircon freezing, signs to watch for, and what you can do to fix and prevent the problem. For expert help, LetsCool Aircon and Services in Singapore offers professional aircon servicing, maintenance, and repair to ensure your unit runs efficiently all year round.
Daikin Aircon Servicing
Mitsubishi Aircon servicing
Midea Aircon servicing
Panasonic Aircon servicing
1. Low Refrigerant Levels
One of the most common causes of an aircon freezing up is low refrigerant. The refrigerant is responsible for absorbing heat from your indoor air. When the refrigerant level drops due to a leak, the pressure ...
... in the system also decreases, causing the evaporator coils to become too cold. As a result, moisture in the air freezes on the coils, forming layers of ice.
Aircon Gas Top-up
Aircon Steam Cleaning
If you notice your aircon is blowing warm air, making hissing sounds, or showing signs of ice buildup, you may have a refrigerant leak. It’s crucial to call a professional technician from LetsCool Aircon and Services in Singapore to inspect, repair, and refill the refrigerant safely.
2. Poor Airflow or Blocked Filters
Your air conditioner relies on steady airflow to function properly. When the air filters are clogged with dust and dirt, airflow is restricted, and the evaporator coil doesn’t get enough warm air to absorb. This imbalance can lead to the coils freezing.
Dirty filters not only cause icing but also reduce cooling efficiency and air quality. Regular aircon servicing, including filter cleaning, helps maintain proper airflow and prevents freezing. LetsCool Aircon and Services provides comprehensive aircon maintenance packages to clean filters, coils, and fan blades, ensuring smooth performance and better cooling efficiency.
3. Thermostat or Sensor Issues
Sometimes, a faulty thermostat or temperature sensor can cause your aircon to run longer than necessary, resulting in excessively low coil temperatures and ice formation. The thermostat is designed to regulate temperature by turning the compressor on and off, but when it malfunctions, it can cause the system to overcool.
If your aircon doesn’t seem to cycle off or maintain a consistent temperature, it’s time to have it checked by a professional technician. LetsCool Aircon and Services in Singapore can diagnose and replace faulty thermostats, ensuring accurate temperature control and preventing freezing problems.
4. Dirty Evaporator Coils
Over time, dirt and debris can accumulate on the evaporator coils, acting as insulation and preventing heat transfer. When this happens, the coils become too cold and can freeze up. This is often caused by irregular or poor maintenance.
To avoid this, regular chemical cleaning is recommended to remove deep-seated dirt and restore proper heat exchange. The expert technicians at LetsCool Aircon and Services offer aircon chemical wash and chemical overhaul services to clean your unit thoroughly and restore optimal performance.
5. Faulty Blower Fan
Your aircon’s blower fan is responsible for pushing air over the evaporator coils. If the fan motor is malfunctioning or spinning too slowly, air cannot circulate efficiently, leading to freezing. A faulty fan may also cause strange noises, weak airflow, or uneven cooling.
A professional aircon inspection can determine whether your blower motor needs repair or replacement. LetsCool Aircon and Services provides reliable aircon repair services across Singapore, ensuring your aircon’s internal components work smoothly.
6. Low Outdoor Temperature
While not common in Singapore’s climate, sometimes aircon units can freeze up due to cooler outdoor temperatures during the night or rainy season. This typically affects systems that run continuously without adjusting the thermostat or fan speed.
To prevent this, set your aircon to a slightly higher temperature at night and use energy-saving modes when possible. Regular servicing from LetsCool Aircon and Services can also ensure your system is properly calibrated for Singapore’s weather conditions.
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
Aircon water Leaking
Daikin Aircon water leaking
Midea Aircon water leaking
Mitsubishi Aircon Water Leaking
Panasonic Aircon Water Leaking
How to Prevent Aircon Freezing
Preventing your aircon from freezing up starts with regular maintenance and proper usage habits. Here are a few key tips:
Clean or replace air filters every month.

Schedule professional aircon servicing every 3–6 months.

Keep vents and air pathways unobstructed.

Monitor refrigerant levels and inspect for leaks.

Avoid setting the thermostat too low for long periods.

By following these steps, you can extend your aircon’s lifespan, improve cooling efficiency, and prevent costly repairs.
Aircon General Service
Call LetsCool Aircon and Services for Expert Help
If your aircon is freezing up or not cooling properly, it’s best not to ignore the problem. Continuing to use a frozen unit can cause compressor damage, leading to expensive repairs or replacements.
Aircon compressor cleaning
With more than years of experience, LetsCool Aircon and Services in Singapore is your trusted partner for all aircon-related needs — from installation and servicing to repair and chemical cleaning. Their team of experienced technicians can quickly identify the cause of your frozen aircon and restore it to peak performance.
They handle all major aircon brands, includingMitsubishi Electric, Mitsubishi heavy, Daikin, Panasonic, Midea, Hitachi, York, Toshiba, Haier, and Sharp, for both residential and commercial systems. Whether you need a one-time service or a contract maintenance plan, LetsCool ensures top-quality workmanship and customer satisfaction.
Aircon spare parts
Annual Service Contract
Final Thoughts
A frozen aircon is more than just an inconvenience — it’s a sign that something’s wrong inside your cooling system. By understanding the causes and acting promptly, you can save money, energy, and stress.
For professional aircon servicing and repair in Singapore, trust LetsCool Aircon and Services. Contact them today at +65 9862 3678 for a free, no-obligation consultation and let the experts keep your aircon running smoothly all year round.
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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