Why Is Water Leaking from Your AC Indoor Unit? Causes & Deep Cleaning in Tirupur
Water dripping down bedroom walls from a split AC indoor unit can ruin paint, wallpaper, and electrical sockets. Here is why AC water leakage happens in Tirupur homes and how technicians resolve it.
The Most Common Cause: Blocked Condensate Drain Tray
During cooling, your AC indoor evaporator coil pulls moisture from room air, producing up to 15 to 20 liters of condensed water daily. This water drips into a plastic drain trough and flows outside through a flexible drain hose.
Over months of operation in dusty areas like Rayapuram and Velampalayam, airborne dust combines with condensation to form a thick, jelly-like algae slime. This slime blocks the drain outlet, causing water to pool inside the chassis and spill over the front grill.
Evaporator Coil Freezing and Melting Overflow
If the AC is low on refrigerant gas or the blower fan speed is severely reduced by dirt, the cooling coil temperature drops below freezing point. A thick blanket of white ice builds up across the coil.
When the compressor cuts off, this entire ice mass melts rapidly. The volume of melting water overwhelms the narrow drain tray, cascading down the wall behind the indoor unit.
Improper Drain Pipe Slope or Kinked Pipe
Condensate drainage relies entirely on gravity. If the indoor wall mounting plate has tilted slightly or the outdoor drainage hose has a reverse slope or upward bend, water backs up into the unit. Technicians re-align the mounting bracket and ensure an uninterrupted downward gradient.
Immediate Steps When AC Starts Leaking Water
Turn Off the AC Immediately
Switch off the unit to prevent dripping water from reaching the indoor electronic control circuit board.
Protect Electrical Sockets & Furniture
Place a bucket or dry towels beneath the unit and move electronic items away from the drip area.
Inspect the Outdoor Drain Hose
Check if the outdoor drain hose outlet is submerged in a bucket of water or clogged with dirt.
Book a Professional Drain Flush
Have a technician pressure-flush the drain pipe and apply antibacterial cleaning foam.
Estimated Drain Cleaning Charges in Tirupur
Inspection & Visiting Fee: ₹199 – ₹299 (adjusted into final bill).
Drain Pipe Unclogging & Pressure Flush: ₹450 – ₹650.
Full Indoor & Outdoor Jet Wash Service: ₹599 – ₹899.
Drain Hose Replacement (3 to 5 meters): ₹300 – ₹500.
Related Appliance Services & Guides in Tirupur
Frequently Asked Questions
No, running the AC during a leak risks electrical short circuits on the indoor control board and causes wall plaster damage.
Technicians use a pressurized water jet pump to flush out accumulated slime and clean the internal collection trough with antibacterial solution.
Slow leaks occur when the drain line is partially restricted; water drains slowly at first but overflows once condensation accumulates faster than it can escape.