5 Possible Reasons for Aircon Water Leakage

May 27, 2024

This morning we received a phone call from a customer asking how she could stop her aircon from leaking water. She couldn't find out the reason for her aircon water leakage. Although the question is seemingly simple, there is no one solution to it.  The dehumidifying process of the air conditioner causes some condensation, but pooling or leaking water is an issue of concern.

What causes aircon water leakage?

Let us highlight the five possible reasons for aircon water leakage:

Clogged drain line

After years of continual usage, aircon drain line is bound to get clogged by dirt, mold, dust or sludge thwarting free flow of water.  In this case, you need to unclog it. There are different DIY unclogging methods but we recommend you hire a professional aircon technician who will use a special vacuum to clear the unwanted material out.

Improper Installation

One of most common reasons for water leakage but often overlooked is improper installation of aircon units. If the unit is not level, or there is too much pressure due to closed vents in the house, water may begin to pool. A professional technician can easily identify it even before investigating other possible reasons

Low Refrigerant

The gas (refrigerant) in the aircon may have leaked due to unsealed leaking areas in the unit. Low refrigerant will lower pressure in the system causing the evaporator coil to freeze over. When the coil melts, water flows over the drain pan. In this case, you need to seal the leaking areas before topping up gas. Topping up gas is expensive and is not required often unless more than 50% of it has leaked out

Dirty air filter

Another common reason for aircon units leaking water is dirty air filter. As you imagined, dirty air filter blocks air flow over the evaporator coil turning the coil cold and freeze over time. When the coil melts, water starts flowing over the drain pan. We recommend you change the filter every quarter of the year

Broken Pump

If the condenser pump is broken, your aircon unit will not pump the excess water out. Check if the power of the pump is sufficient by pouring water into it. If it is, check for motor or condenser failure. A professional aircon technician can help you determine the source of the problem.

What are the things to monitor regularly to keep your aircons maintained?

To ensure your air conditioner (AC) is functioning properly and efficiently, it's important to perform regular checks. Here are five key aspects to monitor.

Air Filter

What to Check The condition of the air filter.
Why A dirty or clogged air filter can restrict airflow, reducing efficiency and potentially causing the system to overheat or fail.
How Often Monthly, especially during peak usage times.

Thermostat Settings

What to Check The accuracy and settings of your thermostat.
Why A dirty or clogged air filter can restrict airflow, reducing efficiency and potentially causing the system to overheat or fail.
How Often Regularly, at least once a month, and whenever you notice a discrepancy in temperature.

Condenser Unit

What to Check The cleanliness and condition of the outdoor condenser unit.
Why Debris, dirt, and obstructions can impede the condenser’s ability to release heat, reducing efficiency.
How Often Inspect every month and clean as necessary, particularly after storms or high winds.

Refrigerant Levels

What to Check Ensure refrigerant levels are within the recommended range.
Why Low refrigerant can cause the AC to malfunction, resulting in poor cooling performance and potential damage to the compressor.
How Often Annually, during a professional maintenance check, or if you notice the system isn't cooling properly.

Air Vents and Ducts

What to Check The condition and blockage of air vents and ducts.
Why Blocked or dirty vents and ducts can reduce airflow, affecting overall system performance and air quality.
How Often Every few months, with a more thorough inspection annually.

Regularly checking these components will help maintain your air conditioner’s efficiency, extend its lifespan, and ensure a comfortable indoor environment. Additionally, scheduling an annual professional maintenance service can help catch issues that might not be apparent during routine checks.

Download the Sendhelper app or visit the website to book a professional aircon service provider for general servicing, annual maintenance, chemical wash, and/or topping up refrigerant.

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