Common Causes
- A clogged condensate drain line — the most common cause in humid climates
- A full or slightly tipped condensate pan
- A disconnected or cracked drain line
- A frozen coil that is now thawing and overflowing the pan
- A drain line that was not sloped correctly during installation
- A dirty air filter that let the coil freeze, which then leaks as it thaws
What You Can Safely Check
- Turn the system off at the thermostat to stop water flow and prevent further damage
- Place towels or a shallow pan under any visible leak to protect flooring
- Check the drain line's outdoor exit point for a visible blockage without disassembling anything
When to Call NILOV
- Any time you see an active water leak — call promptly to limit water damage to flooring, ceilings, or the unit
- You cannot find an obvious cause after turning the system off
- The leak keeps returning after being cleared before