Why Is Water Leaking From Your Air Conditioner?

The drain system is often the problem

The most common cause of a dripping indoor unit is a blocked drain line or dirty drain tray.

When water cannot flow out correctly, it overflows from the unit and starts leaking into the room.

Other causes to watch for

Not every leak comes from dirt. Frozen coils, bad insulation, or poor installation angle can also cause repeated dripping.

That is why a quick inspection is better than relying on trial-and-error fixes.

• Drain blockage
• Dirty evaporator coil
• Frozen coil from low airflow or low gas
• Incorrect installation level

How to reduce damage before the technician arrives

If water is already dripping onto the floor or wall, switch the unit off and protect any nearby furniture, extension plugs, or soft furnishings. A small leak can become a bigger cleanup problem if it continues for hours.

Do not keep restarting the unit repeatedly just to test whether the leak has stopped. If the source is a blocked drain or a freezing coil, more runtime may only make the water situation worse.

• Turn the unit off if water is actively dripping
• Move furniture or electronics away from the leak path
• Take a photo of the leak pattern before cleanup if possible

The difference between a one-time drip and a recurring leak

A one-time drip can sometimes happen after a dirty filter or temporary condensation imbalance, but repeated leaking usually means the cause has not been solved. That is where water leak repair aircon KL work needs more than a surface clean.

If the same unit keeps leaking every few weeks, the inspection should cover drainage, coil condition, installation angle, and whether the unit is also struggling with airflow or low gas.