What Causes a Wet Air Filter and How to Prevent It

Learn what causes a wet air filter in your HVAC system & how to prevent it from happening again. Contact AND Services for all your HVAC repair needs.

What Causes a Wet Air Filter and How to Prevent It

The air cleaner in your HVAC system has an important role to play. It prevents dust and other particles from settling on the equipment and improves indoor air quality. A wet air filter is a sign of a potential problem that should not be ignored. Possible causes of wet air filters can vary.

One of the most common reasons is that the condensate tray or condensate drain line is blocked. Water could also be leaking from the evaporator coils, although this is less common. Most homeowners are aware that a clean air conditioner filter is an essential part of their HVAC systems. If the air conditioner filter is wet or feels damp and soggy when you go to change it, there is an issue with the system itself.

If the problem is not addressed, the wet filter will not be able to remove dust and debris from the air and keep it out of the air conditioner. Most air conditioning units need to have their filter changed every 30 to 90 days. This is a straightforward task that most homeowners can do themselves, but if you change the filter and find it damp or even soaked, you should have your unit checked out.If none of the above steps help you resolve the problem of a wet air conditioner filter, you can contact AND Services for all your HVAC repair needs. We even offer an air filter subscription service, so you never have to worry about forgetting your air filters.A wet air filter can cause a lot of problems, but there is only one thing that wets the filter in the first place.

Changing air filters regularly helps prevent this problem by reducing the amount of debris that enters the drain pipes and trays that clog them.If the air filter becomes clogged with moisture, it makes it more difficult for the air conditioning system to “breathe”. If the condensate tray drain is clogged, this will allow moisture to build up and be absorbed by the air filter. The air conditioner cools your home by moving warm, moist air through a series of evaporator coils. When the filter gets wet, mold and mildew can form on the filter media, making indoor air quality difficult.The wet filter will also restrict the airflow needed for cooling and air distribution.

With nowhere to go, condensate returns to the drip tray until it overflows, resulting in a wet floor or, in some cases, a soggy air filter. However, you should also occasionally check both your air filter and condensate drain system to make sure they don't get wet.

Preventing Wet Air Filters

There are several steps you can take to prevent your air filters from getting wet. First, make sure that your condensate drain line is clear and free from any blockages or debris. You should also check for any leaks in your evaporator coils and make sure they are sealed properly.

So what is it that causes an air filter to get wet? The most likely culprit is a clogged condensate drain pipe. If this pipe gets blocked up with dirt or debris, water will start to back up into your system and eventually make its way into your air filter.

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