Why is my AC vents not blowing hard?

Problems like a fan clogged with dirt, a dead motor, a loose fan belt or a stuck wheel can all cause your blower to not work properly. These problems can keep the blower fan from blowing enough air out of your vents to keep you cool. Your evaporator coil needs air to blow over it to complete your AC's cooling process.

Read remaining answer here. Also know, how do I increase the airflow in my vents?

3 Simple Ways to Improve Your Furnace's Airflow for More Comfort

  1. Unblock and clean your vents. Here's a super easy way to increase air flow.
  2. Change your filters and clean your return grill. A dirty air filter impedes air movement and makes it hard for your furnace to work efficiently.
  3. Seal leaky ductwork. Snap on some goggles and a dust mask, it's time to check out your air ducts.

Beside above, how do I reduce airflow in my vents? High static pressure makes airflow more audible

  1. Adjust the fan speed. Your blower or furnace fan should be set to deliver the proper airflow per ton.
  2. Add ductwork.
  3. Add a bypass duct.
  4. Add or expand grilles and registers.
  5. Replace existing registers and grilles with high velocity models.

Subsequently, question is, why is air not coming out of my vents?

The most common cause of low air flow through the vents in your home is blocked or dirty AC filters. Also known as vents, registers are the metal grates that let air flow from the AC ductwork into the rooms of your home. Vacuum these grates once a month, or anytime you see that dust has accumulated on them.

How do I increase the air flow in my AC upstairs?

  1. Hot Air. Keep in mind, that heat rises.
  2. Hot Roof.
  3. Ductwork, Insulation and Seals.
  4. Redirect airflow to the second floor.
  5. Change filters.
  6. Insulate and ventilate the attic.
  7. Insulate windows.
  8. Change the fan setting on your thermostat from "auto" to "on"