Air Conditioner Water Leakage: 8 Causes and Remedies

Air Conditioner Water Leakage not only affects living spaces but can also elevate indoor humidity, gradually causing foul odors and fostering bacteria growth. For households with elderly and young children, excessive moisture can lead to respiratory issues such as coughs and bronchitis. Additionally, air conditioner leaks pose the risk of electrical hazards, resulting in potential shocks and environmental damage.

8 Causes of Air Conditioner Water Leakage

8 main reasons for air conditioner water leakage include:

1 – Blocked drainage pipe: The cause of blocked drainage pipes is the accumulation of dust, insects, or prolonged presence of dirt within the evaporator coil without regular cleaning. Additionally, clogged drainage pipes may result from low humidity conditions, promoting the growth of mold, moss, and bacteria. Consequently, water cannot escape, leading to internal condensation and leakage.

Uncleaned and unmaintained evaporator coil: Accumulates a lot of dust, bacteria, and harmful agents. The consequence is freezing due to blocked airflow inside. When the air conditioner is turned off, the ice will melt and create excess water leaking outside.

Clogged, cracked, or broken condensate drain pan: This cause is often found in old air conditioners that have been used for a long time, causing the drain pan to tilt. It can also occur in newly purchased air conditioners due to cracks or breakage during transportation or incorrect installation.

Improper air conditioner installation​: Due to inexperienced air conditioner installers installing the drainage pipe too long without ventilation holes or proper slope.

Air conditioner low on or out of refrigerant: Long-term usage causes oxidation of joints or incorrect installation. Insufficient refrigerant leads to frost buildup on the evaporator coil, causing water leakage outside.

Evaporator coil fins freezing: When the air conditioner is turned off, the ice blocks will melt and leak water outside. There are two main causes of evaporator coil fins freezing: reduced airflow and refrigerant leakage.

Damaged or excessively old drainage tray: If your air conditioner has been in use for more than 10 years and experiences water leakage, the cause may be a damaged or rusted drainage tray unable to hold water.

Issues with the condenser coil: The function of the condenser coil is to drain water outside to prevent leakage. Therefore, if this component is damaged, the air conditioner will leak water.

How to fix air conditioner water leakage

When your air conditioner leaks water, it's best to turn it off and stop using it immediately. Then, identify the exact cause to find the appropriate solution.

1- Due to blocked drainage pipe: Unblock the drainage pipe using a vacuum cleaner, wet vacuum, or pressure pump.

2 – Because the evaporator coil isn't regularly cleaned or maintained: Clean the evaporator coil, remove the dust filter to eliminate all dirt.

3- Due to clogged, cracked, or broken condensate drain pan: You can't fix this issue yourself, contact a professional air conditioner repair technician for the best assistance.

4- Due to improper air conditioner installation​: You can't fix this issue yourself, contact a professional air conditioner repair technician for the best assistance.

5- Due to air conditioner low on or out of gas: If it's low on gas, it can be refilled, but if it's out, it needs a new refill. Contact a professional air conditioner repair technician for the best assistance.

6 – Due to damaged or excessively old drainage tray: Contact the repair service and professional technicians to replace the new drainage tray.

7 – Due to evaporator coil fins freezing: Check and remedy the frozen evaporator coil fins.

8 – Due to issues with the condenser coil: Contact a professional air conditioner repair technician for the best assistance.

Some tips to reduce air conditioner water leakage

You can reduce the risk of air conditioner water leakage by:

+ Regularly clean the air conditioner every 3-6 months, dust filters should be cleaned once a month.

+ Replace the air filter after 4 – 5 months of use.

+ Maintain and service the air conditioner every 3 – 4 months.

+ Replace the air conditioner if it has been used for over 10 years.

Here is information about 8 reasons why air conditioners leak water along with corresponding remedies. Hopefully, they will be useful for you when using the air conditioner!