The Top Causes of An Aircon Water Leak and How to Address Them

Air conditioning units comfort our homes and workplaces, especially during the hot months. However, they are not without their issues, with an aircon water leak being a common problem that users encounter. Recognizing the inconvenience and potential damage caused by water leaks, Jing Yit Service emerges as a leading aircon repair and maintenance service provider dedicated to addressing this prevalent issue efficiently.

Understanding Aircon Water Leaks

Air conditioning units are essential for maintaining comfortable indoor temperatures, but their operation can sometimes lead to water production. This phenomenon occurs as aircon units cool the indoor air by passing it over a cold evaporator coil, which causes moisture in the air to condense on the coil’s surface. 

Normally, this condensation is collected in a drain pan and expelled from the unit through a drainage pipe. However, various issues can disrupt this process, leading to water leaks within the system. Understanding the basic principles behind aircon unit water production is crucial for effectively diagnosing and addressing leaks.

Top Causes of an Aircon Water Leak

1. Blocked Drainage Pipe

The drainage pipe can become blocked due to algae, mould, or debris accumulation, preventing water from being expelled from the aircon unit. This blockage can cause water to back up and leak out of the unit.

Jing Yit Service’s Solution: Jing Yit Service employs a comprehensive approach to diagnosing and clearing blocked drainage pipes. Technicians use specialized tools to inspect the pipes for blockages and employ effective cleaning methods to remove any obstructions, ensuring the water can flow freely again.

2. Dirty Air Filters

Air filters in aircon units are crucial for trapping dust, pollen, and other airborne particles, ensuring the air quality remains high and protecting the unit’s internal components. Airflow over the evaporator coil is restricted when air filters become clogged with dirt. This can cause the coil to freeze over, and when it melts, it produces excess water that the drain pan may not be able to handle, leading to leaks.

Preventative Measures: Jing Yit Service recommends regular cleaning or replacing air filters as a preventative measure against water leaks. They provide clients with easy-to-follow cleaning tips and suggest a routine maintenance schedule to keep filters clean and efficient.

3. Improper Installation

Improper installation of aircon units can lead to several issues, including incorrect unit levelling. This can prevent water from draining properly, causing it to leak out of the unit.

Prevention Strategy: Jing Yit Service ensures that all installations are performed by experienced technicians who follow strict guidelines to ensure the unit is correctly positioned and securely mounted, minimizing the risk of water leaks due to installation errors.

4. Low Refrigerant Levels

Low refrigerant levels can cause the pressure in the aircon system to drop, leading to the freezing of the evaporator coil. Like the issue with dirty air filters, a frozen coil that thaws can produce more water than the drain pan can handle, resulting in leaks.

Jing Yit Service’s Approach: Jing Yit Service technicians are skilled in detecting and correcting refrigerant levels. They use specialized equipment to check the refrigerant and recharge the system if necessary, ensuring the unit operates efficiently and is less likely to leak.

5. Damaged Drain Pan

The drain pan may become damaged or corrode, especially in older units. Cracks or holes in the pan can allow water to leak out.

Solutions Offered: Jing Yit Service thoroughly inspects drain pans and offers solutions ranging from repair to replacement, depending on the extent of the damage. Ensuring the drain pan is in good condition helps prevent potential leaks.

By addressing these common causes of aircon water leaks, Jing Yit Service helps maintain the efficiency and longevity of air conditioning units, ensuring comfortable and leak-free environments for their clients.

DIY Fixes vs Professional Help

While the internet is awash with DIY fixes for almost every household issue regarding aircon water leaks, the advice is clear: do not attempt a DIY fix. The intricacies of air conditioning systems require a professional touch to diagnose and solve effectively without risking further damage to the unit or your property. Calling in professionals like Jing Yit Service ensures that the root cause of the leak is identified and rectified with the right tools and expertise.

The Benefits of Professional Maintenance

Professional maintenance offers several benefits that go beyond the immediate repair of water leaks:

  • Expert Diagnosis: Professionals are trained to quickly identify the cause of leaks, ensuring the problem is solved efficiently.
  • Prevent Future Issues: Professionals can prevent future occurrences by addressing the root cause of leaks, saving you time and money in the long run.
  • Extend Unit Lifespan: Regular professional maintenance keeps your aircon unit running optimally, extending its lifespan.
  • Safety: Professionals follow safety protocols to prevent accidents, protecting you and your property.
  • Warranty Preservation: DIY repairs can void warranties. Professional services ensure that your unit remains under warranty.

Preventative Measures

Preventing aircon water leaks is far more cost-effective than dealing with the aftermath. Jing Yit Service recommends several preventative measures to keep your air conditioning unit in top condition:

A. Regular Cleaning

  • Air Filters: Clean or replace air filters every 1-3 months to ensure proper airflow and prevent coil freeze-ups.
  • Drainage System: Regularly check and clean the drainage pipe and pan to prevent blockages and overflow.

B. Annual Maintenance Check-Up

  • Schedule an annual maintenance check-up with Jing Yit Service to ensure all parts of your aircon unit are functioning correctly. This includes checking refrigerant levels, inspecting electrical connections, and cleaning coils and filters.

C. Proper Use

  • Thermostat Settings: Avoid setting your thermostat at extremely low temperatures to prevent overworking your unit.
  • Unit Rest: Give your aircon unit periodic rests, especially during cooler periods, to reduce wear and tear.

D. Professional Installation and Repairs

  • Ensure that any installation or significant repairs are carried out by professionals like Jing Yit Service. Proper installation and repair are crucial to preventing leaks and other issues.

Importance of Regular Check-Ups and Maintenance Services

Regular check-ups and maintenance services are essential for the following reasons:

  • Early Detection: Regular maintenance helps in the early detection of potential issues before they escalate into major problems.
  • Efficiency: Keeping your aircon unit well-maintained ensures it operates efficiently, saving energy costs.
  • Air Quality: Regular maintenance ensures that your unit continues to provide high-quality, clean air free from pollutants and allergens.

By adhering to these preventative measures and leveraging the expertise offered by Jing Yit Service, you can enjoy a comfortable indoor environment free from the hassle of aircon water leaks.


Throughout this exploration of aircon water leaks, we’ve identified the top causes that can disrupt the comfort and efficiency of your indoor environment. From blocked drainage pipes and dirty air filters to improper installation, low refrigerant levels, and damaged drain pans, each issue presents a unique challenge that requires timely and effective solutions. Addressing these problems promptly prevents further damage to your aircon unit and ensures a healthier, more comfortable living space.

Jing Yit Service is a beacon of reliability and expertise in aircon maintenance and repair. With their comprehensive approach to diagnosing and resolving issues and commitment to quality service, Jing Yit Service is your go-to partner for keeping your aircon unit functioning flawlessly.

Don’t let an aircon water leak dampen your comfort or compromise your unit’s efficiency. Take proactive steps to ensure your aircon system remains in peak condition. Schedule a maintenance check with Jing Yit Service today, and experience the peace of mind that comes from knowing your aircon unit is in the hands of experts. With Jing Yit Service, you can rest assured that your air conditioner will remain leak-free, efficient, and ready to provide you with uninterrupted comfort all year round.