The Problem: Severe Water Leaking in Multiple Rooms
Water leaking from air conditioners is a common issue in Malaysian homes. Learn about the common causes of AC water leaks including clogged drainage pipes, dirty filters, and improper installation. In this case, a homeowner in Petaling Jaya contacted us after discovering water dripping from three different aircond units in their double-storey terrace house. The leaks had been ongoing for weeks, causing water damage to the plaster ceiling and creating a musty smell throughout the upstairs rooms.
Issues Identified
- Master bedroom: Water pooling on floor, damaged laminate flooring
- Second bedroom: Stains on ceiling, peeling paint
- Living room: Continuous dripping during operation
- All units: Reduced cooling efficiency
Our Diagnosis Process
Our technician arrived on-site and performed a comprehensive inspection of all three units. Using specialized equipment, we identified the root causes:
Unit 1 (Master Bedroom): Complete Drainage Blockage
The drainage pipe was completely blocked with algae and sludge. Years of buildup had created a solid obstruction that prevented any water flow. The drain pan had also developed rust spots where water was seeping through.
Unit 2 (Second Bedroom): Cracked Drain Pan
The 10-year-old unit had a severely rusted and cracked drain pan. The metal had corroded through in multiple spots, allowing water to escape before reaching the drainage pipe.
Unit 3 (Living Room): Improper Installation
The previous installer had used an undersized drainage pipe (16mm instead of the standard 20mm) and failed to create proper slope angles. The pipe was also sagging in one section, creating a trap where water accumulated.
The Solution: Complete Drainage System Restoration
Repairs Completed
- Replaced 12 meters of drainage piping with proper 20mm PVC pipes
- Installed new drain pans in Units 1 & 2
- Applied proper slope angles (minimum 1:100) for optimal drainage
- Installed drain pipe traps to prevent backflow
- Deep chemical cleaning of all indoor units
- Added insulation to prevent condensation on exposed pipes
The Repair Process
Our team worked systematically through each unit:
- Morning (9:00 AM - 11:00 AM): Master bedroom unit. Removed old drainage pipe, installed new PVC piping with proper slope, replaced rusted drain pan, and performed chemical wash.
- Midday (11:00 AM - 12:30 PM): Second bedroom unit. Similar process with additional rust treatment on the unit frame.
- Afternoon (12:30 PM - 2:00 PM): Living room unit. Major pipe rerouting to correct installation errors. Installed proper support brackets to prevent future sagging.
All work was completed in a single day with minimal disruption to the household. We used drop cloths and protective coverings to keep the work area clean.
Results
- Zero leaks: All three units have been operating leak-free for 3+ months since repair
- Improved cooling: Units now reach set temperature 30% faster due to proper drainage
- No more odors: Musty smell completely eliminated
- Peace of mind: 6-month warranty on all replacement parts and workmanship
"The team was professional and thorough. They explained everything clearly and even showed us photos of the damaged parts. It's been months and we haven't had a single drop of water. Highly recommend their service!"
If the water is dripping directly from the indoor unit onto your wall or floor, our more specific guide on water dripping inside the room covers targeted fixes for indoor drip problems.
— Mr. Tan, Petaling Jaya
Preventive Measures for Homeowners
To avoid similar issues, we recommended the homeowner:
- Schedule regular aircond cleaning every 3-4 months
- Get annual chemical washes to prevent algae buildup
- Check for early signs: water stains, musty smells, or reduced cooling
- Replace drain pans every 8-10 years as preventive maintenance
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