Keep an Eye Out for These 3 Common A/C Condensate Drain Issues

Keep an Eye Out for These 3 Common A/C Condensate Drain IssuesYour A/C not only cools air, but it also works as a dehumidifier. In fact, the industrial air conditioner was invented as an early dehumidifier, because cool air holds less humidity than warm air. The humidity removed from your air by the A/C is disposed of through the condensate drain. If it clogs, that water can re-evaporate near the internal workings of your HVAC system. It’s a good idea to take care of A/C condensate drain issues as soon as possible. 

Mold Growth

When there’s a problem with the condensate drain, it can cause humidity issues that encourage mold growth. Mold growth, in turn, can contribute to clogs in the drain, impacting the indoor air quality throughout your home. When mold grows inside the cooling system, it can also cause problems in the air conditioner. To prevent mold growth, rinse the drain with a diluted bleach solution once or twice a year.

Odors From the Drain Trap

Just like your home’s sinks, the condensate drain has a U-shaped trap, which is a section of pipe that holds a small amount of water and creates an air seal. This seal prevents odors from the sewer line from coming into your home. If the trap is dry, whether from a long period of disuse or very dry weather, odors may make their way into your house. Flush the line with water to seal the trap again.


If the condensate drain becomes blocked, water may back up. When this happens, it can lead to costly water damage. If you notice flooding around the air conditioner, try to clear out the drain with a diluted bleach and water solution. If that doesn’t help, you may want to contact your local plumbing or HVAC expert.

To learn more about handling A/C condensate drain issues in your southwest Oklahoma home, contact Davis Air Conditioning today.

Our goal is to help educate our customers in the Lawton and Duncan, Oklahoma area about energy and home comfort issues (specific to HVAC systems).

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