A wet air filter is usually a sign that the condensate tray or drain lines are clogged. When an air conditioner is running, moisture from the air condenses on the evaporator coils and then drips into the drain pan. If something prevents the water from draining, it will overflow and the air filter can absorb that moisture. The most likely cause of a wet filter is a clogged condensate drain pipe.
A faulty condenser (also known as a compressor) can also be responsible for wet air filters. If the condenser does not work properly, it will not condense moisture in the refrigerant correctly. This means that the refrigerant will not evaporate completely and will instead return to the air cleaner. A clogged condensate line is another common cause of a wet filter.
The condensate line is a pipe that expels water condensate from the heat exchanger. Over time, the drain can become clogged with contaminants such as mold and mildew, which can cause an overflow. When the air filter gets wet, it creates an ideal environment for mold growth. Mold is very resistant and can grow quickly, so it's important to replace the filter and repair the underlying cause of the wet air filter.
We even have an air filter subscription service, so you'll never have to worry about forgetting your air filters. Preventing Wet Air Filters To avoid damp air filters, it's important to keep up with routine maintenance. This means ensuring that your HVAC system is working properly and that all components are functioning correctly. If you do this, you should never find a wet air filter.
What to Do When You Discover a Wet Air Filter If you do find a wet air filter, remove it and dry the area. This will help prevent mold growth and other problems caused by a damp filter.