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Why Is My AC Filter Wet?

Is the filter for your air conditioner wet when you go to change or clean it, or do you have moisture accumulating or dripping elsewhere around your air conditioner? This can happen for a few reasons, such as airflow problems that lead to icing or clogged lines preventing drainage of condensate.

This can be both a symptom of another problem with your AC and a problem in and of itself. Even if nothing else is wrong or is going to go wrong, you don’t want unmanaged moisture accumulating in your home and growing mold, attracting pests, ruining your air quality, or contributing to water damages.

Today, we’ll look at a few different problems that might be responsible, how to fix them, and how to prevent the ones most immediately in your control.

Leaky or Damp AC Causes and Solutions

Frozen Evaporator Coils

This is one of the most common problems with an air conditioner. When your AC ices over due to poor air quality, there are a few potential causes and solutions. In many cases, it happens because you’ve delayed changing the filter too long.

Let it thaw completely, install a fresh new filter, and see if it’s better. To prevent future blockages, you’ll need to change it more often or use a weaker filter that won’t catch as much.

If that doesn’t work, you have a mystery for an HVAC technician to solve.

Damaged Drain Pan

Look at the drain pan of your air conditioner, which is usually near the floor of the indoor air handler (in a home with a furnace, your AC will typically be using the furnace air handler). You can follow the line down from the evaporator coils if you’re unsure where to look.

Minor cracks and damage can be fixed with epoxy, but it’s usually best to replace the pan. 

Clogged Condensate Drain Line

Perhaps the most significant potential sources of drainage issues are clogs in your condensate drain line. This is what carries water that condenses on your evaporator coils away to dispose of it outside. If you don’t have your system tuned up regularly, dirt and debris can end up in the condensate, which can end up in the lines, which will eventually lead to clogs.

Cleaning your condensate drain line can be part of annual tune-ups or a separate service, so be sure you ask about it when scheduling annual maintenance. You might also be able to DIY it with a wet/dry vacuum if you want to learn how.

You can also discourage the growth of mold and mildew by pouring something like vinegar through your lines to kill mold and mildew. It might not remove anything already stuck there, but it can help keep the problem from developing or worsening.

Learn More or Request Assistance

Need to know more about problems that can lead to a wet AC filter or need professional assistance? The team at Damiani’s will gladly answer your questions and schedule service for this and other HVAC problems you may have.

Contact us online today or call 210-646-9600 to get started!

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