Aircon Leaking Water?
Here's Why It Happens & How to Fix It Yourself
A dripping aircon is the most common AC complaint in Malaysia — and the good news is that most cases can be fixed yourself, without waiting for a technician or paying a RM80–150 service call.
In this guide, we'll cover the 5 real causes of aircon water leaks, how to identify which one you have, and the easiest fix available — including how to use K-Dry, a made-in-Malaysia product designed specifically to solve this problem.
Why Is My Aircon Leaking Water? 5 Real Causes
1. Clogged Drain Pipe — The Most Common Cause
This is the number one reason aircons leak water in Malaysia. As your aircon runs, it pulls moisture from the air and produces condensation. That water is supposed to drain out through a small pipe. When that pipe gets blocked by algae, mold, or debris — water backs up, fills the drip tray, and overflows into your room.
Signs of a clogged drain pipe: Water dripping from the bottom of the indoor unit while the aircon is running, or a puddle forming on the floor directly below the unit.
2. Dirty Air Filter
A clogged filter restricts airflow over the evaporator coil. When airflow is reduced, the coil gets too cold and freezes over. When the aircon is turned off and the ice melts, the water overflows the drip tray faster than it can drain.
Quick tip: Clean your filter every 2–4 weeks if you run the aircon daily. This alone prevents around 40% of water leak cases.
3. Frozen Evaporator Coil (Icing)
Beyond a dirty filter, icing can also be caused by low refrigerant levels or a room set to an extremely cold temperature. When the aircon turns off and the ice thaws, the volume of water is too much for the drain to handle quickly — causing a leak.
4. Cracked or Displaced Drip Tray
The drip tray (condensate pan) sits under the evaporator coil to catch water before it drains out. If it's cracked or has shifted out of position — especially in older units or after a rough service job — water bypasses the tray entirely and falls straight down.
5. Incorrect Installation Angle
An aircon unit installed tilting forward instead of slightly backward causes water to flow toward the front of the unit and drip into the room. This is an original installation issue that needs a professional to correct.
How to Fix Aircon Leaking Water — Step-by-Step
For causes 1 and 2 — clogged drain and dirty filter — you can fix this yourself in under 20 minutes. Here's how:
- Turn off your aircon completely Switch off from the remote, then turn off the wall switch or circuit breaker. Wait for the unit to stop fully before opening anything.
- Remove and clean the filter Lift the front panel and slide out the filter — no tools needed. Rinse it under running water, shake off excess water, and leave it to air dry completely before reinstalling.
- Install K-Dry K-Dry is a filter pad that sits inside your aircon unit, absorbing excess water and preventing algae growth in the drain pipe. Follow the instructions in the box — no tools, no modification to your aircon required.
- Turn on and monitor Reinstall the filter, close the front panel, and switch the aircon back on. Watch for 30 minutes. In most cases the leak stops immediately.
K-Dry vs Other Methods — Honest Comparison
You might be wondering: why not just call a technician or flush the drain myself? Here's the honest breakdown:
| Criteria | K-Dry | Call a Technician | DIY Drain Flush |
|---|---|---|---|
| Cost | ~RM29 | RM80 – RM150 | Free (but tricky) |
| Time | 10 minutes | Wait for appointment | 30–60 minutes |
| How long it lasts | 6–12 months | Problem often recurs | Usually recurs quickly |
| Skills needed | None | Needs a technician | Some knowledge needed |
| Prevents algae regrowth | Yes — active 24/7 | No (only cleans existing) | No |
K-Dry doesn't just fix the problem — it prevents it from coming back. Unlike a one-time drain flush that only removes what's already there, K-Dry actively stops algae and mold from regrowing in the drain pipe between services.
Frequently Asked Questions
The Bottom Line
A leaking aircon is frustrating — but it's almost always fixable, and in most cases you don't need to call anyone or wait for a service appointment.
For the two most common causes (clogged drain pipe and dirty filter), K-Dry is the most cost-effective fix available. One install, continuous protection until your next service.
Maintenance checklist: Clean your filter every 2–4 weeks, replace K-Dry at your annual service, and make sure the drain pipe outlet isn't blocked. Do these three things and your aircon should run leak-free for years.
Still Dealing With a Leaking Aircon?
K-Dry ships anywhere in Malaysia. Or WhatsApp us — we'll help you figure out what's causing the leak.