Why Is My Aircon Leaking Water? 5 Expert Causes & Solutions in Singapore

If you’ve noticed your aircon leaking water, you’re not alone. Many homeowners in Singapore experience this issue, especially due to the country’s hot and humid climate. Ignoring an aircon water leak can lead to bigger problems—from electrical hazards to mold growth and expensive repairs.

So, why is your aircon leaking water? What are the possible causes, and more importantly, how can you fix it? In this guide, we’ll break down the five most common reasons for aircon leaks and provide expert solutions to prevent further damage.

1. Clogged or Disconnected Drain Line – The Most Common Cause

A clogged drain line is one of the most frequent reasons for aircon leaking water inside your home. Over time, dirt, dust, algae, and debris can build up in the drain pipe, blocking the flow of condensation. When this happens, the water has nowhere to go and starts leaking from the aircon unit instead.

🚩 Signs of a Clogged Drain Line:
✔️ Water dripping from the indoor unit
✔️ Visible dirt or algae near the drain outlet
✔️ Musty or moldy smell from the aircon

📌 Solution:
✅ Clean the drain pipe regularly – Use a vacuum or air pressure to remove blockages.
✅ Schedule professional aircon servicing – Experts can flush the drainage system to ensure smooth water flow.
✅ Install a drain line sensor – This can alert you when a clog is forming, preventing future leaks.

💡 Regular maintenance is the key to preventing drain blockages and water leaks!

2. Improper Aircon Installation – Incorrect Positioning Leads to Leaks

Did you recently install a new aircon, and it’s already leaking? If so, improper installation might be the issue. An incorrectly installed unit may not be level, preventing condensation from draining properly. Instead of flowing out, water accumulates and leaks inside your home.

🚩 Signs of Installation Issues:
✔️ Water pooling beneath the aircon unit
✔️ Unusual dripping noises from the system
✔️ The aircon is tilted instead of being level

📌 Solution:
✅ Ensure the aircon is properly installed – It should be slightly tilted so water drains outward.
✅ Hire a professional installer – An expert from Aircon Servicing & Repair Singapore can ensure correct alignment to prevent leaks.

💡 If your aircon was recently installed and is leaking, it’s best to have a professional check the installation.

3. Dirty or Blocked Air Filter – Airflow Issues Cause Freezing & Leaks

A dirty or clogged air filter restricts airflow, causing ice to form on the evaporator coils. When the ice melts, it produces excess water, leading to an aircon leaking water inside the house.

🚩 Signs of a Blocked Air Filter:
✔️ Weak or reduced airflow from the vents
✔️ Ice buildup on the aircon unit
✔️ Water dripping from the indoor unit

📌 Solution:
✅ Clean or replace air filters every 1-2 months – This ensures smooth airflow and prevents ice formation.
✅ Schedule routine aircon servicing – A professional technician can inspect and clean your aircon system to prevent leaks.

💡 Regular filter cleaning not only prevents leaks but also improves cooling efficiency and air quality.

4. Refrigerant Leaks & Low Gas Levels – Can Cause Excess Condensation

If your aircon has low refrigerant (gas), the evaporator coil gets too cold and freezes over. When the ice melts, excess water is produced, leading to an aircon leaking water inside.

🚩 Signs of Low Refrigerant Levels:
✔️ Aircon is not cooling properly
✔️ Hissing noise from the AC unit (indicating a refrigerant leak)
✔️ Ice forming on the evaporator coils
✔️ Water dripping excessively when the ice melts

📌 Solution:
✅ Check refrigerant levels – If gas levels are low, your aircon may need a gas top-up.
✅ Fix refrigerant leaks immediately – A professional should seal the leak and refill the refrigerant to prevent further issues.
✅ Schedule an inspection – If your aircon is frequently losing gas, it may indicate a bigger problem that needs fixing.

💡 A refrigerant leak is dangerous and should be addressed by a professional technician immediately.

5. Damaged or Disconnected Drain Pan – Water Has No Place to Go

The drain pan collects condensation and directs it into the drain line. If the pan is damaged, rusted, or misaligned, the water won’t flow properly and may leak onto the floor.

🚩 Signs of a Damaged Drain Pan:
✔️ Water pooling near the indoor aircon unit
✔️ Rust or cracks in the drain pan
✔️ Persistent leaks despite cleaning the drain line

📌 Solution:
✅ Check the drain pan for cracks – If it’s damaged or rusted, it needs to be replaced.
✅ Ensure the pan is properly aligned – A misaligned pan can cause water to leak instead of draining properly.

💡 If your aircon is old, the drain pan might have rusted over time and may need replacement.

Is Aircon Water Leakage Dangerous?

Many people wonder, “Is aircon leaking water dangerous?” While not immediately hazardous, constant water leakage can cause serious problems, including:

❌ Electrical hazards – Water near wiring can cause short circuits.
❌ Mold and mildew growth – Can lead to respiratory problems and bad odors.
❌ Structural damage – Water seeping into walls and ceilings can weaken structures.

💡 Addressing leaks early can prevent costly repairs and health risks!

How to Fix an Aircon Leaking Water?

If your aircon is leaking, follow these steps:

🔹 Turn off the aircon immediately – Prevents electrical hazards.
🔹 Check the air filter – If it’s dirty, clean or replace it.
🔹 Inspect the drain pipe – If it’s clogged, clean it with a vacuum or call a professional.
🔹 Look for refrigerant issues – If your aircon isn’t cooling properly, it might need a gas refill.
🔹 Call a professional – If you can’t find the issue, book an aircon servicing appointment.

Prevent Aircon Leaks with Regular Servicing

To avoid costly aircon leaking water repairs, schedule regular maintenance with a trusted service provider like Aircon Servicing & Repair Singapore.

✅ Thorough cleaning of filters, coils, and drain pipes
✅ Refrigerant level checks & gas top-ups
✅ Inspection for leaks, rust, or worn-out parts
✅ Proper realignment & installation checks

📌 Need help fixing an aircon leak? Contact Aircon Servicing & Repair Singapore today for expert assistance!

Final Thoughts: Why Is Your Aircon Leaking Water?

🚩 Common Causes:
✔️ Clogged drain line – Water can’t drain properly.
✔️ Improper installation – Aircon isn’t level.
✔️ Dirty air filter – Causes ice buildup.
✔️ Refrigerant issues – Leads to excess condensation.
✔️ Damaged drain pan – Water leaks onto the floor.

💡 Regular servicing can prevent these issues and keep your aircon running smoothly!