The draft occurs when the furnace is on but not running. When the furnace runs, these vents are taking in air from the room to the furnace as they should.

Why is my air return not pulling air?

Blockage usually comes over time, by a buildup of dust and debris that just accumulates until it begins choking the system. To alleviate this, perform consistent home maintenance, as well as utilizing the help of a professional with professional HVAC maintenance! You can also specifically schedule duct cleaning!

What happens if a return vent is blocked?

What Happens When A Return Vent Is Blocked? Very similar to blocking a heat register, blocking an air return vent restricts the air flow in your home. Blocking air return vents causes your system to work harder, as there is less air flow to move the air back to the furnace.

How do I know if my return air is working?

Try this simple test when your HVAC system is running: get a piece of tissue paper and dangle it about six inches from one of the return vents. You should be able to see it being gently pulled towards the vent. Next, place it up against return vent and see if the air suction holds it in place.

How do you fix low return airflow?

How to Improve HVAC Airflow

  1. Clean your air filters regularly. …
  2. Check your AC vents to see if they are not obstructed in any way. …
  3. Fix any leaks and holes in your HVAC ductwork. …
  4. Clean your fan blades regularly with a soft cloth.
  5. Schedule regular AC tune-ups to help your unit run smoothly.

How do you increase return air flow?

5 Ways to Improve Airflow in Your Home

  1. Check Vents and Registers. One of the simplest things you can do to increase airflow in your home is to check the vents and registers in each room. …
  2. Turn on Ceiling Fans. …
  3. Schedule HVAC Maintenance. …
  4. Consider Duct Cleaning. …
  5. Invest in a Ventilator.

How do I get more air out of my vents?

How Do I Increase the Airflow in My Vents?

  1. Clean outdoor condenser unit.
  2. Vacuum indoor vents and keep them unclogged.
  3. Increase the thermostat temperature.
  4. Keep blinds and curtains closed.
  5. Clear your drain line.
  6. Insulate any exposed ductwork.

Why is my room so hot compared to the rest of the house?

First, check for these common problems: Dirty air filter—A dirty filter restricts airflow, not letting your home get enough cool air. Closed vents—Closed vents in rooms can cause them to be hotter than other rooms. Open windows—Your conditioned air can flow out of open windows, leaving uneven temperatures in your home.

Should I put filters in my return vents?

In general, it is recommended to have an air filter in every return vent (as long as you choose the one of the right size and thickness). The filters will improve the air quality in your house and will protect the HVAC equipment from dust, pollen, pet dander, and hair.

Why is my AC vents not blowing hard?

Most of the time, a frozen evaporator is caused by 1 of these 2 issues: Low airflow issues (dirty air filter, blocked vents or malfunctioning blower) Low refrigerant levels, usually caused by a refrigerant leak.

Why is my AC airflow weak?

Reasons for weak AC airflow include: A clogged air filter. Frozen evaporator coils. Leaky or blocked air ducts.

Why is my AC barely blowing cold air?

Leaking or Low Refrigerant

The refrigerant, mostly commonly Puron or R410A, is the chemical that puts the whole process in motion. If your central AC is not blowing cold air, the refrigerant may be the problem. The unit could be running low and need additional refrigerant added. The most likely cause of this is a leak.