Aircon Leaking Water? Expert Repair in Singapore

Why Is Your Aircon Leaking Water?

Water leaking from your aircon is one of the most common problems in Singapore homes. As part of our aircon servicing in Singapore, we fix water leaks every day. The good news is that most water leaks can be fixed quickly by an experienced technician. Here are the main causes we encounter.

1. Clogged Condensate Drain

This is the number one cause of aircon water leaks. Your aircon removes humidity from the air, producing condensation that drips into a drainage tray and flows out through a drain pipe. Over time, dust, dirt, algae, and sludge accumulate in the drain pipe, blocking the flow.

When the drain is blocked, water fills the drainage tray and overflows — dripping from the indoor unit onto your wall or floor.

2. Dirty Air Filter

A heavily clogged filter restricts airflow over the evaporator coil. When airflow is reduced, the coil temperature drops below normal and ice forms on its surface. When the ice melts, the excess water overwhelms the drainage tray, causing a leak.

3. Low Refrigerant Gas

Similar to a dirty filter, low gas causes the evaporator coil to freeze. The ice then melts and produces more water than the drain can handle. If you see ice on your copper pipes or evaporator coil, your system likely needs a gas top-up.

4. Drainage Tray Overflow

Over time, the drainage tray itself can accumulate sludge and debris, especially if the aircon has not been serviced regularly. A chemical wash thoroughly cleans the drainage tray and eliminates bacterial build-up.

5. Installation Defects

Improper installation can cause water leaks if:

• The drain pipe slope is insufficient for gravity drainage
• Pipe connections are loose or improperly sealed
• The indoor unit is not level (water pools on one side)
• Pipe insulation is damaged, causing condensation on external pipes

These issues require an experienced technician to identify and correct. Our team has handled thousands of installation-related water leak repairs across Singapore.

How We Fix Aircon Water Leaks

1. Diagnose the source — we identify exactly where the water is coming from
2. Clear the drain — pressurised water flush to clear blockages in the condensate pipe
3. Clean the tray — remove sludge and debris from the drainage tray
4. Check gas levels — verify refrigerant pressure to rule out ice formation
5. Inspect installation — check pipe slope, connections, and insulation
6. Test drainage — pour water through the system to confirm proper flow

Preventing Future Leaks

Regular servicing every 3-4 months is the best way to prevent water leaks. During each service, our technicians flush the drain pipe, clean the filter, and check the drainage tray — addressing small issues before they become leaks.

For units with recurring drain issues, we may recommend a chemical wash to deep-clean the entire drainage system and eliminate algae growth.

Need help now? WhatsApp us for same-day water leak repair. Read more about drain pan leaking issues or condensation problems.