5 Reasons Why Your Air-Con Is Leaking Water & How To Fix The Problem

Air conditioners sometimes leak water when running normally. However, you need to understand the difference between the amount of water expected and when the air conditioner is leaking too much. Keep reading to learn more about why aircon is leaking, what you can do to fix the problem, and when to call a HVAC professional for assistance.

Five Reasons Why Your Air-Con Leaks and How to Fix the Problem

1. Clogged Drain Line

One of the most common source of leaks in air conditioners is a clogged drain line. If your drain line is clogged, water will not drain from the overflow pan and out through the drainpipe or outside depending on your setup. It can be particularly problematic in window A/C units tilted in the wrong direction. If you find water leaking from the front, you should know that the A/C unit was installed improperly.

It is important to note that modern air conditioning units have emergency shutoff functionality to protect them from damage should a clog be detected in the drain line. While the feature is very useful since it prevents water damaged, it can be puzzling when the air conditioning unit shuts down suddenly. A clogged drain line could be responsible for the sudden shut down of your A/C unit.

How to Fix It

Check the tubing for any debris or dirt. If you find any resistance, clear the blockage. Once you do this, water will be free to flow into the drainpipe and out the bottom as it should. You can prevent clogs by regularly pouring a cup of bleach into the drain line from the inside of the A/C unit. If a clog has already happened, you can use a vacuum to suck it out.

2. Dirty Air Filter

The air filter in your A/C unit should be changed regularly. If you leave it in for too long, it will get dirty and will start impeding the air flow. The air around the evaporator coil starts getting too cold and the coils freeze forming ice both on and in the unit. Once the ice melts, water starts dripping and you get a leak.

How to Fix It

Filters are typically designed to last at most two months. To prevent leaks, check your air filters regularly, especially if the unit is in heavy use. The simple task of changing your air filters regularly will help make your A/C unit run efficiently and can prevent mawny problems.

3. Improper Installation

A central air conditioning unit may start leaking water outside if it isn’t level. Water starts pooling up unevenly in the overflow pan and starts dripping over the side. It is important to make sure that the air conditioner is absolutely level and on a flat surface. If it is not perfectly flat, level it out by adjusting the concrete pad it sits on.

How to Fix It

If you have a window A/C, ensure that the unit is slightly tipped up to allow the water to drain out the back and outside. If your A/C unit is too flat, water may start flowing the wrong way and start spilling into your home.

4. Damaged or Cracked Drain Overflow Pan

When checking your drain line, it is also important to check the drain overflow pan underneath the unit too. Inspect all corners as well as along the edge for holes, notches, or cracks. Anything that allows water to spill out onto the floor before it reaches the drain hose is a problem.

How to Fix It

You can use epoxy to repair small holes, but a complete replacement of the drain pan is the best solution for the problem.

5. Broken Pump

A broken pump will not allow water to be draw from the overflow pan. The pan will start filling until it starts to drip on the floor. Pour some water into the pan to test the pump. If nothing happens and you are certain that the drain line is not clogged, the pump is broken,

How to Fix It

Fixing a broken pump is unfortunately not a DIY job. It requires a HVAC professional to come replace the pump.

The Bottom Line

The five fixes to the most common causes of A/C leaks provided here should solve your water leakage problem. If you try everything and your A/C unit still leaks or it won’t turn back on, you should contact a HVAC professional. Check out billyaircon.com.sg if you live in Singapore.


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