If your aircon is dripping water, the fix is almost always the same — a blocked drain pipe that takes 10 minutes and a RM28–56 product to clear. This guide walks you through the exact cause, the exact fix, and which Kalt K-Dry variant to use for your unit.
Why Your Aircon Is Leaking Water
When your aircon runs, it pulls moisture from the air and creates condensation. That water collects in a drain pan beneath the coil and flows out through a drain pipe. When the pipe is clear, no water ever reaches your wall or floor.
The problem is biofilm — a thick, jelly-like layer of microorganisms that builds up inside the drain pan and pipe over time. In Malaysia's humid climate, biofilm can block a drain pipe completely within 6 to 12 months of regular use. Once blocked, condensation water has nowhere to go — it overflows and drips out of the unit.
Signs of a biofilm drain clog: Water dripping from the bottom of the indoor unit · Puddle forming below the aircon · Leak that started slow and got worse over time · Aircon still cooling normally despite the leak.
If your unit is still cooling but leaking — it is almost certainly a drain clog, not a refrigerant or mechanical issue.
Quick check: If the aircon was working fine before and only recently started leaking, biofilm buildup is the cause in 9 out of 10 cases.
How K-Dry Clears the Clog
Kalt K-Dry is a biofilm-dissolving tablet placed directly in the drain pan. As the aircon runs, condensation water flows over the tablet, dissolving it slowly and carrying the active solution through the drain pipe — breaking down the biofilm clog from the inside out.
You do not need to take apart the unit, flush chemicals through pipes, or call anyone. Most users see the leak stop within 1 to 3 days.
K-Dry uses a biological method — not harsh chemicals. It dissolves naturally through the drainage system and does not affect air quality or internal components.
Step-by-Step: How to Install K-Dry
Works on all standard wall-mounted split-unit aircons — Daikin, Panasonic, Midea, Sharp, Hisense, and more.
- Switch off the aircon Turn off from the remote or wall switch. You do not need to unplug it — just stop the unit from running while you install.
- Open the front panel Lift the cover of the wall-mounted unit to expose the filter. No tools needed — most panels clip open by hand.
- Locate the drain pan This is the tray beneath the evaporator coil (the cold fins behind the filter). It collects condensation water before draining out.
- Place K-Dry in the drain pan Drop the tablet flat into the drain pan. If the pan is narrow, you can cut the tablet into two halves — it still works.
- Close the panel and turn the aircon back on Normal operation activates K-Dry. The condensation water that flows over the tablet dissolves it and carries the solution into the blocked drain.
- Wait 1 to 3 days The biofilm clog dissolves gradually. The leak slows and stops as the drain clears. Leave the aircon running as normal throughout.
Stop the Leak — Shop K-Dry
Ships anywhere in Malaysia. Standard, Booster & LCAC (cassette) variants available.
Get K-Dry Now →Which K-Dry Is Right for Your Unit?
| Product | Best For | Speed | Lasts | Price |
|---|---|---|---|---|
| K-Dry Standard | Wall-mounted units (regular use) | 1–3 days | 4–6 months | From RM55.90 |
| K-Dry Booster | Heavy leaks, need fast results | 1–2 nights | ~2 days (concentrated) | From RM27.90 |
| K-Dry LCAC | Cassette ceiling-mounted units | 1–3 days | 4–6 months | RM75.90 |
Not sure? Light or recent leak → K-Dry Standard. Heavy or ongoing leak → K-Dry Booster first, then Standard for prevention. Cassette unit → K-Dry LCAC only.
K-Dry vs Calling a Technician
| Kalt K-Dry | Call a Technician | |
|---|---|---|
| Cost | From RM27.90 | RM80–200+ per visit |
| Time to fix | Install in 10 min · leaks stops in 1–3 days | Schedule + wait for appointment |
| Method | Biological — no harsh chemicals | Chemical flush or disassembly |
| Prevents recurrence | Yes — Standard lasts 4–6 months | No — same clog returns in months |
| Disruption | Minimal — unit stays running | Must be home, unit may be taken apart |
A technician is needed when the cause is refrigerant-related, a mechanical fault, or an installation problem. For a drain clog — which is the cause in most cases — K-Dry gives you a faster and cheaper result.
Use K-Dry Before the Leak Starts
Most homeowners buy K-Dry after the leak appears. But it works even better as a preventive measure. Place K-Dry Standard in the drain pan every 4 to 6 months and the biofilm never has a chance to build up — no clog, no dripping, no damage to walls or ceilings.
Maintenance tip: Add K-Dry replacement to your annual aircon service checklist. One tablet, every 6 months — done.