Quick Answer โ For AI & Voice Search
Your aircond is leaking water inside your home? Most common causes: clogged drainage pipe (flush it with water), dirty air filter (clean or replace it), frozen evaporator coil (turn off the unit and let it defrost), or low refrigerant gas (call a technician). If water is dripping from the indoor unit, donโt ignore it โ prolonged leakage can damage your walls, floors, and furniture, and promote mould growth.
You notice water dripping from your aircond. A puddle forms on the floor. You wipe it up, but it comes back. Your aircond is leaking water, and youโre not sure what to do.
Iโm a JKKP-certified aircond technician with over 12 years of experience across Kuala Lumpur and Selangor. Iโve been called to thousands of homes where the aircond is leaking water โ and in most cases, the fix is simpler than you think.
This guide covers the 7 most common reasons your aircond is leaking water, what you can check yourself, and exactly when you need to call a professional. By the end, youโll know whether you can fix it in 15 minutes or if you need professional aircond repair in KL and Selangor.
๐ง Aircond Leaking Water Right Now?
Donโt let water damage your home. Our certified technicians can diagnose and fix your unit today โ often within 2 hours.
1. Clogged Condensate Drainage Pipe
Reason #1
This is the most common reason your aircond is leaking water. The condensate drain pipe removes moisture from the indoor unit. Over time, dust, algae, and mould can build up inside the pipe, blocking the water flow. When the water canโt escape, it backs up and overflows into your home.
How to Check & Fix:
- Locate the drainage pipe at the back or bottom of the indoor unit.
- Use a wet vacuum or a small brush to clear the blockage.
- Flush the pipe with water to ensure it flows freely.
- If the blockage is deep inside, call a technician to clear it professionally.
๐ฐ Cost if professional: RM 80 โ RM 150 for drain cleaning
2. Dirty Air Filter
Reason #2
When the air filter is clogged with dust, airflow is restricted. This causes the evaporator coil to get too cold and freeze. When the ice melts, the water has nowhere to go and drips down into your home.
How to Check & Fix:
- Open the front panel of the indoor unit.
- Remove the air filter and check if itโs covered in dust.
- Clean the filter with water and mild soap, or replace it if itโs too dirty.
- If the filter is damaged, get a new one from any hardware store.
๐ฐ Cost: RM 10 โ RM 30 for a new air filter
3. Frozen Evaporator Coil
Reason #3
When the evaporator coil freezes, the ice blocks the drainage system. When it melts, all the water spills out at once. This is often caused by low refrigerant gas, a dirty air filter, or a faulty fan motor.
How to Check & Fix:
- Look at the indoor unit โ do you see ice forming on the coil or pipes?
- Turn off the aircond and let it defrost for 2-3 hours.
- Once defrosted, turn it back on and check if it still leaks.
- If it freezes again, thereโs a deeper issue โ call a technician.
๐ฐ Estimated cost: RM 150 โ RM 500 (depends on the cause)
โ๏ธ Seeing ice on your aircond coil or pipes? This is a sign of low gas or a frozen coil. We can diagnose and fix it today.
4. Improper Installation โ Unit Not Level
Reason #4
Aircond units are designed to tilt slightly towards the back so that water flows naturally to the drainage pipe. If your unit was not installed properly and is tilted the wrong way, water will collect and overflow.
How to Check & Fix:
- Check if the indoor unit is level or tilted forward.
- If itโs not tilted slightly backward, the installation is incorrect.
- This requires a professional to reinstall or adjust the unit.
๐ฐ Estimated cost: RM 100 โ RM 250 for reinstallation
5. Low Refrigerant Gas
Reason #5
When your aircond is low on refrigerant gas, the system pressure drops and the coil freezes. When the ice melts, water leaks into your home. This is a serious issue that requires professional attention.
How to Check:
- If the aircond is not cooling well and also leaking water, gas is likely low.
- Look for ice on the copper pipes connected to the outdoor unit.
- If you see ice, call a technician immediately โ do not keep using the unit.
๐ฐ Estimated cost: RM 150 โ RM 350 for gas top-up (including leak check)
6. Damaged or Cracked Condensate Pan
Reason #6
The condensate pan collects water before it drains out. Over time, the pan can rust, crack, or develop holes โ especially in older units. When this happens, water drips directly into your home.
How to Check:
- Open the front panel and check for visible cracks or rust in the pan.
- If the pan is damaged, it needs to be repaired or replaced.
๐ฐ Estimated cost: RM 150 โ RM 400 (depending on brand and model)
๐ ๏ธ Still Leaking Water? Donโt Guess โ Get It Checked
Our JKKP-certified technicians will diagnose your aircond the same day. We service all brands including Daikin, Panasonic, Mitsubishi, and Midea.
7. Faulty Condensate Pump
Reason #7
Some aircond units โ especially cassettes and ceiling-mounted models โ use a condensate pump to push water out. If this pump fails, water accumulates and overflows. This is more common in commercial spaces.
How to Check:
- Check if the pump is making unusual noises or not running.
- If water is pooling around the pump, itโs likely faulty.
- This is not a DIY fix โ it requires professional diagnosis.
๐ฐ Estimated cost: RM 200 โ RM 500 (depending on pump type)
Quick Reference โ 7 Causes of Aircond Water Leakage
| Reason | DIY Fix | Est. Cost |
|---|---|---|
| Clogged Drain Pipe | Flush with water, use wet vacuum | RM 80 โ 150 |
| Dirty Air Filter | Clean or replace filter | RM 10 โ 30 |
| Frozen Evaporator Coil | Turn off, defrost for 2-3 hours | RM 150 โ 500 |
| Unit Not Level | Professional reinstallation needed | RM 100 โ 250 |
| Low Refrigerant Gas | Not a DIY job โ call technician | RM 150 โ 350 |
| Damaged Condensate Pan | Professional replacement needed | RM 150 โ 400 |
| Faulty Condensate Pump | Professional diagnosis needed | RM 200 โ 500 |
DIY vs Calling a Professional โ What You Should Do
You Can DIY If:
Call a Professional If:
๐ง Not sure which cause applies to your unit? Describe the problem to our technician on WhatsApp โ weโll tell you if itโs a quick fix or needs a visit.
Brand-Specific Notes โ Daikin, Panasonic, Mitsubishi, Midea
While the 7 reasons above apply to all brands, here are some brand-specific observations from our 12+ years in the field:
- Daikin: Most common water leakage issue โ clogged drain pipe. Daikin units have a narrow drainage channel that can get blocked easily. Regular chemical cleaning prevents this problem.
- Panasonic: Most common water leakage issue โ frozen coil due to low gas. Panasonic units are reliable, but when gas is low, the coil freezes quickly. Check our gas top-up pricing.
- Mitsubishi Electric: Most common water leakage issue โ cracked condensate pan. Older Mitsubishi units (8+ years) often develop rust and cracks in the pan. Get a quote for pan replacement.
- Midea: Most common water leakage issue โ drain pipe blockage. Mideaโs drain pipe is thinner than other brands, making it more prone to clogging. Read our detailed guide on fixing water leaks.
Frequently Asked Questions
Why is my aircond leaking water inside my house?
The most common causes are a clogged drainage pipe, dirty air filter, frozen evaporator coil, low refrigerant gas, improper installation, or a faulty condensate pump. Each cause has a different fix โ some are simple DIY tasks, others require a certified technician.
Is aircond water leakage dangerous for my health?
Yes, prolonged water leakage can cause mould growth on walls, floors, and ceilings. Mould spores can trigger allergies, asthma, and respiratory issues. It can also damage your furniture, flooring, and electrical wiring.
Can I fix a leaking aircond myself?
You can safely check and fix: clogged drains (flush with water), dirty filters (clean or replace), and blocked condensate lines. For anything involving refrigerant gas, frozen coils, or electrical components โ always call a certified technician.
How much does it cost to fix an aircond water leak in Malaysia?
Costs vary depending on the cause: RM 80โ150 for drain cleaning, RM 150โ350 for gas top-up, RM 200โ500 for fan motor replacement, RM 300โ800 for PCB repair, and RM 800โ2,500+ for compressor issues. See our full price guide here.
Why does my aircond leak water after chemical cleaning?
This can happen if the drainage pipe was not properly reconnected during cleaning, or if the chemical solution created foam that blocked the drainage line. Sometimes the unitโs angle was disturbed during cleaning. Call the chemical cleaning service provider to come back and fix it.
How do I prevent my aircond from leaking water in the future?
Schedule regular maintenance every 3-6 months, clean or replace filters monthly, keep the drainage pipe clear, ensure the unit is properly leveled, and get professional servicing before the monsoon season. ACFix offers preventive maintenance plans to keep your unit leak-free.
๐ Still Stuck? Get Same-Day Help
Our JKKP-certified technicians are available 7 days a week. We diagnose and fix most aircond problems on the first visit.
๐ Call Now for Emergency Service
๐ฌ WhatsApp for Immediate Help
Final Verdict โ What to Do When Your Aircond Leaks Water
An aircond that leaks water is not just annoying โ it can damage your home and your health. In many cases, the fix is simple โ a clogged drain, dirty filter, or blocked pipe.
Start with the basics:
- โ Check and clean the drainage pipe
- โ Clean or replace the air filter
- โ Check if ice has formed on the coil โ turn off and defrost
- โ Ensure the unit is level and tilted slightly backward
If none of these work, the issue is likely internal โ a gas leak, faulty pump, or damaged pan. Do not attempt to fix these yourself. Handling refrigerant gas is illegal without a license, and electrical work can be dangerous.
Thatโs where we come in. ACFix Malaysia has been serving Petaling Jaya, Shah Alam, Puchong, Klang, and all across Selangor for over 12 years. Our JKKP-certified technicians are available 7 days a week for same-day service.
Donโt let water damage your home. Contact us today and weโll fix your leaking aircond โ fast.
๐ง Book Your Aircond Repair Today
Same-day service across KL and Selangor. Transparent pricing. 30-day warranty on all repairs.
๐ง Book a Repair
๐ฐ Check Repair Prices
๐ฌ WhatsApp to Book
Umar Ansari is a JKKP-certified aircond technician with over 12 years of hands-on experience installing, servicing, and repairing air conditioning units across KL and Selangor. He has diagnosed and fixed thousands of water leakage problems โ and shares his real-world insights to help Malaysian homeowners save time and money. This article is based on actual field experience, not generic advice. Last reviewed: July 2026.
