As soon as the summer starts and the scorching heat of the sun begins to creep into your home, like most people, you probably turn to your trusty air conditioner to keep you and your family comfortable. Needless to say, one of the worst things that could happen in summer is to wake up one morning to find that your AC is not working properly just when it feels like your home has turned into an oven.

Perhaps you have noticed water pooling right below your air conditioner. This could make any homeowner nervous, but don’t be! Rarely are leaks a sign of a serious problem. That said, it would still serve you well to contact specialists who offer air conditioning services.

To give you an idea of what you could be dealing with, here are some causes of leaks in air conditioners:

Why Air Conditioners Leak Water

1. The Air Filters Are Dirty

The way home cooling systems work is that they take all the warm air inside your house and then cool it with a refrigerant before sending that cooled air back to your space. This process often goes without a hitch. Problems start when air filters accumulate dirt and get clogged, resulting in blocked airflow. It’s an issue because then moisture from the air gets trapped, and it could lead to ice on the evaporator coils. When that melts, you’ll see droplets of water from your air conditioner.

One of the best ways to prevent this is by ensuring that you replace air filters on a regular basis. Once every three months should work perfectly.

2. The Drain Pan Is Damaged or Rusty

How old is your air conditioner? If it’s more than ten years old, it’s highly likely that its drain pan is already corroded due to age. The drain pan is a significant part of the air conditioning system, and it is consistently in contact with water, so corrosion, cracks, and holes are not that uncommon.

If this is indeed the problem, a new drain pan should be installed. Of course, only an HVAC professional will be able to determine the actual cause of the problem so it’s advisable that you contact a reputable contractor like Capital Plumbing and Heating.

3. AC Installation Is Not Done Right

They may not seem like it, but HVAC systems, even the ones for residential use, are complex and require expertise when they are installed. If the installation is not done right, it could lead to a variety of issues in the future. Even something that seems harmless, like an uneven installation, can lead to water pooling because the unit is tilted.

4. The Condensate Pump Is Faulty

Some air conditioning models depend on pumps to force water from the HVAC system to the outside through drain lines. If the condensate pump is not working properly, excess water will not be taken outside.

A professional can check if the pump is working well. If it’s broken, a replacement pump is necessary.


These are just some of the possible reasons behind a leaking air conditioner. Whatever may be causing the leak, though, it’s important to have it checked by a trained professional from a reputable company. This way, you can be sure that the air conditioning service that you’ll get will not just address the issue but ensure that it won’t happen again anytime soon.

Capital Plumbing and Heating offers reliable air conditioning services in Edmonton and nearby areas. Contact us today to book your appointment!