What to Do If Your Air Conditioner Starts Leaking Water A Real Situation at Home During one hot afternoon, I noticed water dripping from my wall-mounted air conditioner onto the floor. At first, I thought it was normal condensation, but the amount of water increased quickly. Instead of calling a repair service immediately, I decided to consult the [user manuals](https://manymanuals.com/) that came with the device. They gave me a clear list of possible causes and step-by-step solutions. Why an Air Conditioner Might Leak Clogged drain line. Dirt and dust block the pipe that carries water outside. Frozen evaporator coil. Ice buildup melts and overflows the drain pan. Improper installation angle. If the unit is not level, water flows inside instead of outside. Full or damaged drain pan. Over time, the pan can rust or crack. Low refrigerant levels. This can cause the coil to freeze and create excess water. In my case, the drain line was blocked with dust.