Air flow issues can cause your AC unit to cool poorly or shut down unexpectedly. Over time, repairs or even premature replacement may be necessary if air flow issues aren't addressed. You can help prevent air flow from being a problem with your air conditioner by knowing what commonly causes trouble.

1. Dirty Filters

As a homeowner, you know how important it is to change your AC filter, but sometimes this isn't enough. Dust and dirt, particularly if you have recently done renovations in the home or if you have pets, can become stuck inside the air filter slot on your AC. Each time you switch out the filter, also use a stick duster or the upholstery nozzle on your vacuum cleaner to make sure the housing is clean. Also, you may need to change the filter more often if you use a HEPA or high efficiency filter, as the smaller pores on these cause them to become clogged more frequently.

2. Obstructed Vents

Obstructions in the ducts are a possibility. Items can fall down ducts in rooms or even be placed there by a mischievous child, which will block the air flow. Other issues, such as moisture in the ducts trapping dust or causing mold growth, can also lead to a blockage. Another issue is if pests make their way into the ducts, where nest building activities can restrict airflow. Finally, the most obvious cause of blockage is vents accidentally being closed or covered with furniture or other items.

3.  Dirty Coils

The condenser coils on your AC unit only work properly if they are kept clean, otherwise the air flow needed for heat transfer is impeded and your AC has to work harder even though it will be cooling less efficiently. Dust, pollen, yard waste, and other residue can easily coat the coils. Rinsing them off with water will solve the problem if you do it often, but badly soiled coils may require a professional cleaning. Further, make sure that landscaping is kept well trimmed near the unit so that air flow to the coils isn't blocked.

4. Damaged Ductwork

Duct work can become damaged from work in other nearby areas or from the house settling. Some damage is a result of age, such as joints that weaken, gaps that develop, or corrosion that occurs. Once this happens, air won't flow into your AC unit as it's supposed to. A duct inspection can find issues so that you can schedule a repair or duct sealing.

If you suspect an air flow issues is affecting your cooling system, contact an air conditioning repair service in your area.