How to Fix and Prevent a Wet HVAC Air Filter

Your HVAC system’s air filter has an important job. It keeps dust and other particulates from settling in the equipment, and enhances your indoor air quality. Filters should remain dry. A wet air filter signals a potential problem that you should not ignore.

Possible Causes

A wet air filter commonly indicates a clogged condensate pan or condensate drain lines. Water is a natural by-product of a functioning air conditioner. As the system draws warm air from your home to be cooled, moisture from the air condenses on the evaporator coils and then drips into the drain pan. When something prevents this water from draining away, it overflows and the air filter may absorb that moisture.

Another possible cause is moisture that may be falling directly onto the filter from the evaporator coils. This is not typical, but it can happen if something went amiss during the installation of your HVAC unit.

Preventing Wet Filters

A wet filter reduces airflow to the unit and can affect your AC’s performance. Help prevent clogged drain pans and lines by changing the air filter regularly. This prevents particles or debris from entering the inner parts of the system and causing clogs. Also, consider using high-quality filters instead of cheaper filters, which only catch larger particles. Ask your HVAC technician which filter type is best for your system.

Drain lines and pans can also develop clogs from the accumulation of debris and the growth of bacteria. Whatever the cause of the clogs, they can be prevented by regularly scheduled maintenance. An HVAC technician will check all parts of the system, including the drain lines, for any problems and can flush drain lines and remove clogs in the drain pan.

If you are experiencing problems with your filters or any part of your HVAC system, contact the pros at Climate Master Mechanical Contractors, Inc. Give us a call at 708-597-5470 to schedule an appointment or if you’d just like more information. We look forward to helping you with your HVAC needs.