A high-efficiency central AC unit can extract up to 20 gallons of water per day from humid indoor air. When the condensate removal system fails, that water drains directly into your home's ceilings, walls, or basement floors.
Why Is Water Leaking From Your AC?
1. Clogged Condensate Drain Line
Algae, mold, and dust sludge collect in the PVC drain pipe, forming a solid plug. Water fills the primary drain pan and spills over the edges.
2. Damaged or Rusted Drain Pan
In older systems (10+ years), galvanized metal drain pans rust through, allowing water to bypass the drain outlet completely.
3. Failed Safety Float Switch
Modern HVAC installations include an inline float switch designed to kill power to the outdoor unit when water rises in the pan. If this switch fails or was never installed, water continues accumulating unchecked.