Why is my aircon leaking water? In most cases, the problem is caused by blocked drainage, restricted airflow or a fault that allows condensation to collect inside the unit. A little water flowing from the outdoor drain pipe is normal, especially in Phnom Penh’s humid weather. Water dripping from the indoor unit, wall or ceiling is not normal and should be checked before it damages paintwork, furniture or electrical components.
Why is my aircon leaking water indoors?
An air conditioner removes moisture from warm indoor air. That moisture collects on the evaporator coil, runs into a drain pan and leaves through a condensate pipe. If any part of this route is blocked, damaged or badly positioned, the water can overflow indoors.
Blocked condensate drain
Dust, slime and debris can build up inside the drain pipe. This is one of the most common reasons for an aircon leaking water. The pan fills faster than it can empty, so water escapes indoors.
Dirty filter or frozen coil
A clogged filter restricts airflow. The evaporator coil may become too cold and freeze, then release excess water as the ice melts. Low refrigerant or another technical fault can also cause icing, so repeated freezing needs professional diagnosis.
Damaged drain pan or poor installation
An older drain pan may crack or corrode. The drain hose can also loosen, kink or sit at the wrong angle. A wall-mounted unit that is not level may send water towards the room instead of the outlet.
Simple checks before arranging an aircon leaking water fix
First, switch the unit off and disconnect the power if water is close to wiring, sockets or the control board. Mop up the water and move belongings out of the way.
Next, remove and inspect the washable filter according to the manufacturer’s instructions. If it is dusty, clean it gently, let it dry fully and refit it. Look for visible ice on the indoor unit, unusual noises, poor cooling or a musty smell. You can also check whether water is leaving the external drain outlet.
Do not push tools deep into the drain, pour harsh chemicals into the unit or remove electrical covers. These actions can damage the system or create a safety risk.
Is it safe to keep using an aircon that is leaking?
It is better to stop using it until the cause is clear. Continued operation can spread water into walls and ceilings, encourage unpleasant odours and expose electrical parts to moisture. Turn it off immediately if the leak is heavy, water is near electrics, the unit is icing up, or the leak comes from a ceiling-mounted system.
When to book aircon service in Phnom Penh
Arrange professional help when the leak returns after cleaning the filter, the drain does not flow, cooling performance has dropped, ice keeps forming, or the drain pan or pipe appears damaged. Commercial systems should be checked promptly because a small leak can disrupt work areas and affect equipment below.
Regular aircon maintenance helps keep filters, coils, drain pans and condensate lines clean and correctly positioned. Tunsai Cleaning supports residential and commercial customers with aircon service in Phnom Penh, including diagnosis of water leaks and drainage issues. A proper inspection identifies the source of the problem and provides the right repair instead of simply wiping away the symptoms.
