AC Water Leakage Repair in Islamabad – Causes and Fixes

AC water leakage is one of the most common complaints AF Tech Fix receives from Islamabad homeowners and office managers. Water dripping from the indoor unit is never normal and should be investigated promptly before it causes ceiling damage, mould growth, or electrical hazards. Here are the 6 real causes and their solutions.

1. Blocked drain pipe

This is the most common cause. The condensate drain pipe from the indoor unit gets blocked by algae, dust, and debris, especially during Islamabad's humid months. A proper drain flush with a thin flexible brush and compressed air restores normal flow. Algae can be prevented with a slow-release drain tablet placed in the drain pan every 3 months.

2. Dirty evaporator coil

When the indoor coil is clogged with dust, airflow drops so much that the coil surface temperature falls below the dew point. Condensation forms faster than the drain pan can handle, leading to overflow. A foam chemical service cleans the coil and restores proper drainage.

3. Low refrigerant causing ice

When gas is low, the evaporator coil freezes. When the unit cycles off, the ice melts rapidly, producing more water than the drain system can handle. Fix the gas leak, refill correctly, and the overflow stops.

4. Incorrect drain slope

A drain pipe must slope consistently downward from the indoor unit to the outlet. If the indoor unit was installed slightly tilted, or if the pipe has a low point that holds water, leakage occurs. Re-levelling the unit and re-routing the drain pipe solves this permanently.

5. Cracked or corroded drain pan

Older units, particularly in units more than 7 to 10 years old, can develop hairline cracks in the plastic drain pan. Water bypasses the drain pipe and drips directly. Pan replacement is a straightforward fix.

6. Condensate pump failure

Units installed where gravity drainage is not possible use a small condensate pump. If this pump fails, water backs up and overflows. Pump replacement restores normal drainage in one visit.

Book AC water leakage repair in Islamabad

Call AF Tech Fix 0311 4714444. We diagnose the exact cause of leakage and fix it in one visit. 90-day warranty on all drain repairs.