What’s a Condensate Drain Pan and Why is It Important to Your Air Conditioning?

We all love an underdog story. In movies, it’s often the unsuspected hero that saves the day. The same could be said about your air conditioning system. Did you know one of the most important parts of your AC is a simple pan?

To be more specific, it’s called the condensate drain pan. Allow us to explain the critical role it plays in keeping your home clean and safe.

What’s a Condensate Drain Pan and Why is It Important to Your Air Conditioning

Why is a condensate drain pan needed?

When the air conditioning is running, the mixture of cold refrigerant coils with warm air can create condensation. These small water droplets are the same as if you leave a glass of ice-cold water to sit out on a hot day.

Condensation is a normal part of the air conditioning processes. Inside the air conditioning system (or furnace) is a drain pan that catches the condensation that falls off the condenser coils. This water is then directed through a pipe where it is discharged outside or down a drain.

What is a secondary drain pan?

If your furnace or AC air handler system is located in the attic, it most likely is installed horizontally since there’s not enough headroom to install it vertically. This is a fine application but it does change the way condensation drips off the coils. So for these instances, you should have a secondary drain pan, sometimes called a back-up drain pan. This is a large pan that is placed underneath the unit, and should be large enough to cover the length and width of the unit so it can collect any water that isn’t caught by the internal drain pan. This secondary drain pan also has its own water discharge line.

Common problems with air conditioning drain pans

The condensate drain pan is a very simple yet important component of your HVAC system. Without it, or if it becomes damaged, you could end up with water leaky around the area of your unit. That’s bad enough if the system is located in the basement but it’s even worse if the furnace or air handler unit is in the attic, which can allow the water to damage your ceilings, walls, floor, and other fixtures.

Common drain pan issues include:

  • Cracks – Over time, a plastic drain pan can develop cracks due to changing temperatures, the weight of water if it fills up, or improper installation. Even a small crack in the pan can allow enough water to seep through and cause significant damage.
  • Clogged drain line – Bacteria or debris can build up in the pipe for the primary or secondary drain pan. If this pipe becomes clogged, the pan can overflow or water can get backed up to the unit, which can cause mechanical issues.
  • Rust – This only applies to really old drain pans that are made out of metal (newer ones are typically plastic). But rusty spots can lead to water leaks and should be addressed as soon as possible.

Evansville, IN air conditioning professionals

Now that you know more about the condensate drain pan, you can identify any possible issues, including unwanted drips or leaks coming from your AC unit. To have your system inspected, call Baylor Heating & Air Conditioning, Inc. We will make sure every component of your AC is in good quality and working properly. Schedule a service appointment today at (812) 425-8435.