A water leak from your split AC's indoor unit is one of the most common monsoon-season complaints in Kolkata. One day you notice water trickling down the wall, dripping onto your furniture, or even spraying out from the bottom of the indoor unit.
The good news is that indoor AC water leaks are almost always caused by a drainage or airflow problem, not a serious compressor fault. Here are the 4 most common reasons your AC is leaking water inside and how to fix them:
1. Blocked Condensate Drain Line
Your AC's indoor unit collects condensation water in a tray and channels it outside through a thin drain pipe.
The Problem: Over time, dust, algae, mud, and insects build up inside this narrow drain pipe. When it clogs, the condensation water has nowhere to go and overflows from the drain tray straight into your room. The Fix: The drain line needs to be flushed clear. Our technicians use a high-pressure jet kit to push out the blockage and clean the drain tray, restoring smooth water flow in 30 to 45 minutes.2. Dirty Air Filters Freezing the Coil
Clogged filters restrict the airflow across the evaporator coil.
The Problem: When airflow drops, the coil temperature falls below freezing and a layer of ice forms. When the AC switches off, this ice melts all at once, overwhelming the drain tray and dripping into the room. The Fix: Slide out the filters, rinse them under running water, dry them fully, and refit them. Clean filters once every 15 days during peak summer to prevent ice buildup.3. Low Refrigerant Gas
Low gas pressure has the same freezing effect as a dirty filter.
The Problem: When refrigerant is low due to a leak, the evaporator coil gets extremely cold and frosts over. The melting ice then drips out as water, and you may also notice weak cooling. The Fix: Simply topping up gas is a temporary fix. We run a nitrogen pressure test to locate the leak, braze the copper pipe, vacuum the system, and recharge the gas with a 90-day warranty.4. Improper Installation or Tilt
A split AC indoor unit must be mounted with a slight tilt toward the drain side.
The Problem: If the unit is mounted perfectly flat or tilted the wrong way, the condensation water pools on the wrong side of the tray and spills into the room instead of flowing to the drain pipe. The Fix: The mounting bracket needs to be re-levelled so the indoor unit tilts correctly toward the drain outlet. Our technicians adjust the bracket and verify proper water flow on-site.Need Professional AC Water Leak Repair in Kolkata?
If water keeps dripping from your indoor unit despite cleaning the filters, the drain line is likely choked. Book a same-day doorstep AC inspection with Appliance Service Kolkata for only ₹299 (completely adjusted in your repair bill). Call us at +91 8240528725 today!
