Why Is No Air Coming Out Of HVAC Vents

You might have noticed that some rooms in your house are not as cool or warm as they should be. You try changing the settings but it does not make a difference. After trying your hands at solving the issue, you realize that there is no air coming out of the HVAC vents. So, you have now got another problem on your hands that needs an AC repair service. Let’s discuss the potential causes along with the solutions.

Clogged Air Filters

The first thing you need to check if there is no air coming out of HVAC vents is clogged air filters. If you have ignored the HVAC maintenance for a while, it might be the air filters are clogged. Air filters are designed to purify the air before it enters the house. Therefore, if the air filters tend to be clogged, do not be surprised if there is no air coming out from the vents.

That said, you should regularly inspect and clean the air filters so that your HVAC system does not have to struggle and utilize more electricity. Furthermore, consult the user’s manual regarding the replacement of the air filters. You will need to replace them after a year or so to keep things moving.

Oversized & Undersized HVAC Unit

When it comes to installing an HVAC unit, a common mistake made by homeowners is ignoring the size of the room. The tonnage of your HVAC unit will depend on the size of the room where you intend to install the system. If the HVAC unit happens to be oversized, it will run short cycles, which means it will turn off frequently. As a result, the wear and tear of your unit will increase, reducing the airflow.

Similarly, an undersized HVAC unit has to work harder to cool down your home. This could overheat the components, especially the capacitor, and lead to replacements down the road.

Debris Accumulation In The Outdoor Unit

In addition to replacing the air filters and looking after the indoor unit, the outdoor unit is equally important as well. The primary reason is that the outdoor unit is exposed to dirt, dead leaves, and branches, and extreme weather conditions that could block the unit.

Plus, the outdoor unit consists of key components such as the condenser, fan, compressor, etc. Therefore, if the outdoor unit is ignored, dirt accumulation on the coils and other components will make it harder for the unit to perform. Ultimately, you will have no air coming out from the vents.

Blocked Or Leaking Ducts

Your AC’s ductwork is responsible for transporting cold air throughout the house. Over time, the ducts can become clogged due to dirt, dust, and debris. Furthermore, the ducts can also develop cracks or holes as they age. As a result, the cold air being transported will escape before it reaches your house.

So, you will have no air coming out from the vents. Not only that, but the air quality of your home will also decrease as the leaking duct sucks up dirt and other pollutants. Therefore, you will simply end up wasting energy and observing rising power costs.

If possible, you can check the ducts for leaks yourself. But if not, you should hire a professional who will use a sealant or duct tape to cover up the holes or cracks. If that does not solve the problem, try looking for dust, and dirt accumulation.

Faulty Thermostat

A faulty thermostat can sometimes be the culprit behind low airflow as well. It might be that the thermostat is not calibrated correctly or has simply malfunctioned. To solve this problem, check the batteries of your thermostat. At the same time, use a soft brush to clean as sometimes elements inside can bend and create problems.

And to determine a faulty thermometer, take a glass thermometer and place it next to your thermostat. After about 15 minutes, check the reading. If the reading shows a discrepancy of 1 or more degrees, you will need to get the thermostat calibrated.

Final Word

No air coming out of your HVAC system can be frustrating. Following the tips mentioned above, you might be able to solve the problem. If not, it means the problem is complicated and you will need to consult air conditioning companies VA who can help you fix the issue.

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