What are the common causes of aircon breakdown?
Author : brindha seo | Published On : 12 Nov 2025
Aircon Repair Servicing
In Singapore’s warm and humid weather, an air conditioner is not just a luxury—it’s a necessity. But just like any other appliance, your aircon can fail unexpectedly, leaving you sweating in discomfort. Understanding the common causes of aircon breakdown can help you take preventive measures and extend your aircon’s lifespan.
If you’ve ever experienced a sudden aircon malfunction, you’ll know how inconvenient it can be—especially during hot days or when guests are around. The good news is that most aircon problems can be avoided through regular aircon servicing Singapore. Below, we’ll look at the most common reasons why aircons break down and how professional servicing from LetsCool Aircon and Services can help keep your system running smoothly.
Common Aircon Problems and Solutions:
1. Dirty Air Filters
One of the leading causes of aircon breakdown is clogged or dirty air filters. Over time, dust, pet hair, and other particles accumulate in the filters, blocking airflow. This makes your aircon work harder to cool the room, leading to overheating and reduced cooling efficiency.
A clogged filter not only strains your system but also reduces indoor air quality. You might start noticing weak airflow, unpleasant odors, or uneven cooling in your space.
✅ Pro Tip: Clean or replace your air filters every month, especially if you use your aircon daily. For a thorough inspection, schedule professional aircon servicing with Letscool Aircon and Services to ensure your filters and coils are properly cleaned and maintained.
2. Refrigerant Leaks
Your aircon relies on refrigerant gas to cool the air. If there’s a refrigerant leak, your unit will struggle to maintain a comfortable temperature. Common signs include reduced cooling, bubbling or hissing noises, and higher electricity bills.
When refrigerant levels drop, your aircon’s compressor must work harder, which may lead to a complete system failure if not addressed quickly.
It’s important not to ignore refrigerant leaks or attempt DIY fixes. Handling refrigerant requires proper tools and expertise. The certified technicians from Letscool Aircon and Services can safely detect and repair leaks, followed by a proper Aircon Gas Top-up to restore performance.
3. Electrical or Wiring Issues
Electrical problems are another common cause of aircon breakdowns. Over time, wiring can become loose or corroded, affecting power delivery to key components such as the compressor or fan motor.
If you notice your aircon frequently turning off, tripping the circuit breaker, or not starting at all, it might be due to faulty wiring or electrical overload.
This issue should always be handled by trained professionals. Letscool Aircon and Services provides comprehensive aircon repair solutions in Singapore, ensuring your electrical components are inspected, repaired, and safely reconnected.
4. Frozen Evaporator Coils
Another culprit behind sudden aircon failure is frozen evaporator coils. This typically happens when there’s restricted airflow, low refrigerant, or dirty filters. When the coils freeze, your system can no longer absorb heat efficiently, leading to warm air blowing out or complete shutdown.
If you notice ice forming on your aircon unit, switch it off immediately to prevent further damage. Schedule a professional aircon servicing appointment to clean the coils, check airflow, and restore normal operation.
Letscool Aircon and Services technicians are well-trained in diagnosing coil-related issues and performing the necessary maintenance or Aircon Chemical Wash to prevent future freezing problems.
5. Blocked or Leaking Drain Pipes
An air conditioner doesn’t just cool air—it also removes humidity. The moisture collected from the air is drained out through a condensate pipe. However, if the drain pipe becomes clogged or leaks, water can back up into the system, leading to leaks, mold growth, or even electrical damage.
A blocked drain can also trigger your aircon’s safety mechanism, causing it to shut down to prevent further damage.
Regular cleaning and inspection of the drainage system during aircon servicing Singapore can prevent such breakdowns. The experts at Letscool Aircon and Services ensure that the drainage line is clear and properly functioning, keeping your home dry and safe.
6. Lack of Regular Maintenance
Perhaps the biggest reason for most aircon breakdowns is irregular maintenance. Many homeowners in Singapore only call for aircon servicing when the system stops cooling—but by then, minor issues may have turned into costly repairs.
Routine servicing helps detect and fix potential problems early, such as refrigerant leaks, motor wear, or electrical faults. Professional technicians from Letscool Aircon and Services provide preventive maintenance that includes deep cleaning, checking components, and testing system performance to ensure your aircon runs efficiently all year round.
7. Aging or Worn-Out Components
Air conditioners typically last between 8 to 12 years, depending on usage and maintenance. As your system ages, components such as the compressor, fan motor, and capacitor can wear out, leading to breakdowns.
If your aircon frequently requires repairs or struggles to cool efficiently, it might be time for a replacement. Letscool Aircon and Services also offers expert aircon installation in Singapore, handling all major brands like Mitsubishi Electric, Mitsubishi heavy, Daikin, Panasonic, Midea, Hitachi, York, Toshiba, Haier, and Sharp.
Prevent Aircon Breakdowns with Letscool Aircon and Services
Preventing aircon breakdowns is all about consistent maintenance and timely repairs. With more than years of experience, Letscool Aircon and Services is one of Singapore’s most trusted names in aircon repair, Aircon Installation, and maintenance. Their professional technicians handle all aircon types—residential, commercial, and industrial—using high-quality equipment and reliable service methods.
Whether you need a one-time aircon servicing, Aircon Chemical Overhaul, or a long-term maintenance contract, Letscool Aircon and Services provides complete support across Singapore.
Final Thoughts
Most aircon breakdowns are preventable with regular care and professional servicing. Don’t wait for your aircon to fail before taking action. Schedule your aircon servicing Singapore with Letscool Aircon and Services today and enjoy a cooler, more comfortable home 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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