Air flow is a common problem in many HVAC systems. Air flow may not seem like a major issue. However, it can lead to bigger issues or be a sign of a problem with your HVAC system’s health. Some air flow problems can be easily corrected and be performed by the homeowner, while other problems will require the aid of professional HVAC technician. Some of the common types of air flow problems can result in hot or cold spots, pressure imbalance, warm air coming from the vents, or no air flow at all. If any of these air flow problems occur, you should investigate them immediately. Hal Mechanical will share some of the reasons behind these types of air flow problems.
Blocked AC Condenser
For those with a condenser unit outside of their home and it is located on the ground, know that they can become covered in debris, vegetation, and other obstructions. When the condenser is obstructed, it will restricted the air flow. Not only is the air flow restricted, but this restriction will also lead to additional stress that will run down the rest of the HVAC system. As a homeowner you can clear the areas around your condenser. You will want plenty of open space around the condenser. You should have at least one to two feet of open space.
Closed Vents & Registers
Another common reason behind weak air flow which will lead to a warmer home, is when the air vents and registers are blocked or closed. To prevent stress on the HVAC system you never want any of the vents closed or the registers blocked. As the homeowner you can check each of the air vents and make sure they are opened fully, even in areas of the home that you may not stay in for long periods of time. Additionally, you will want to make sure they are not obstructed either.
Clogged Air Filters
Inside the registers are the air filters. The air filter captures all of the dust and particles in the air when the HVAC system sucks the air from inside the home. Over time the air filters will become compacted with all of the dust and other particles in your home’s indoor air. Once the air filters are too dirty to allow air to properly flow through them, it will create a restriction that will affect the entire HVAC system and result in a number of problems, including air flow problems. This is another simple task the homeowner should do to restore air flow. Air filters should be changed out every one to three months.
Air Duct Leaks or Obstructions
Another common reason why you may have low air flow or even warm air coming from the vents is when there is an air duct leak. A leak will allow the air to flow out of the leak and not into the home. A vacuum effect can also occur and allow the hot air from the attic into the air ducts. You will need a professional to inspect your air ducts and repair the leak.
Bad Blower or Fan Motor Problems
The fan in the condenser and the blower in the air handler can directly affect the air flow and air balance in a home. Often the motors to both the fan or blower can run down and develop problems. When either one of the motors begin to fail, one common sign is weak air flow from the vents. To determine which motor is failing and see if the motors can be repaired or needs to be replaced, contact an HVAC professional.
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