rating iconrating iconrating icon

Top Causes of HVAC Airflow Issues

hvac airflow issues

At LA Construction Heating and Air one of the most common calls we receive is regarding HVAC airflow issues. If you suspect you have airflow issues, you may be experiencing hot and cold spots in your home, ac system blowing warm air or no air at all. Sometimes airflow issues can even lead to compressor failure or complete system failure. Address any issues right away so it does not cause any unnecessary strain on your system. Take the time to properly maintain your HVAC system to prolong the life of your unit and save you money in the long run. There are many causes of HVAC airflow issues in your home and most can be fixed inexpensively. Below are the top causes of HVAC airflow issues.

Dirty Or Clogged Filters

Dirty, old or clogged air filters are one of the top causes for HVAC airflow issues. Air filters are responsible for keeping dust and debris from your home and out of your equipment and duct system. A clogged or dirty air filter can hinder air flow and can cause damage to your equipment. Be sure to change the air filter according to the manufacturer’s specifications or at the very least at least once every 3 months. Also keep in mind that the higher the MERV rating a filter has, the smaller the pores which can also reduce airflow. Make sure you follow manufacturer specifications and your system can handle high MERV filters.

Issues With Vents and Registers

One simple solution to increase airflow into your home is to make sure all vents and registers are open and unobstructed. An improperly sized return vent can also lead to airflow issues. If it is not the correct size, it may be inadequate to provide enough air for the system to properly function. Furthermore, if dampers are closed it can lead to airflow issues and cause system to run inefficiently.

Low Refrigerant Levels

If your system has not been well maintained especially if you have an older system you may be suffering from airflow issues and reduced cooling due to low refrigerant levels. A slow refrigerant leak will cause a gradual decline in system performance. Contact a professional who can test for leak and repair a leak to get your system working properly.

Obstructed Condenser Unit

One common problem that can lead to HVAC airflow issues is an obstructed condenser unit. Outdoor condenser units can easily become obstructed with leaves and debris that have accumulated around the unit. An obstructed condenser unit with dirty coils can overheat if there’s not enough airflow. The coils can get so dirty that the system will work harder to release heat and cool your home. That is one reason to not neglect regular maintenance of your system at least twice a year. Be sure to always keep the area around your outdoor unit free from debris.

Oversized AC Unit

An oversized ac unit can lead to airflow issues as well. An oversized ac unit will run inefficiently and cycle on and off frequently. This can lead to a space that is uncomfortable. Have your HVAC system checked by an HVAC professional who can determine if your HVAC unit is improperly sized for your space.

Ductwork Issues

If the ductwork is installed in a way that restricts airflow then the space may never receive the air it was designed to get. If the home’s ductwork is not right, it can result in uneven cooling and heating and lower efficiency. Each duct run should be installed in a way that it will deliver the right amount of air to a space. Furthermore, ductwork can also develop holes where air can leak out. These ductwork issues can lead to hvac airflow issues.

AC Blower Issues

The blower fan is responsible for moving the air through the ductwork and throughout the space. If an ac blower is not working properly then it can impede HVAC airflow and lead to airflow issues.

How to Improve Airflow

You can lower the probability of HVAC airflow issues by keeping your HVAC system on a regular maintenance schedule. Some things your HVAC technician can take care of to improve HVAC airflow is replace air filters, clean condenser coils, inspect motors, fan blades, and ductwork. If you are experiencing any of the above symptoms its best to call a professional and schedule maintenance for your system. You don’t have to suffer from HVAC airflow issues, call us today at (818) 341-3406 to see how we can help or to schedule regular maintenance.

Top Causes of HVAC Airflow Issues Related Posts:

Our Services

Air Conditioning Installation

For AC installation, our certified team ensures a professional and seamless AC replacement process. We perform a detailed load calculation to select the perfect AC unit for maximum energy efficiency. We handle everything from ductless mini-split systems to full HVAC system installation, guaranteeing a quality AC installation service that keeps you cool and saves you money. Learn more

two air conditioning units near los angeles
Technician talking to customer about ac

Heating Installation

We provide expert heating installation and furnace replacement services. Our certified technicians perform a thorough load calculation to recommend the best and most energy-efficient furnace installation. We manage every detail of your new heating system installation, from start to finish, to deliver a high-quality, reliable, and professional heating installation service.
Learn more

Air Conditioning Repair

At home or at your workplace, there's always the potential for sudden HVAC operating failure and the need for immediate HVAC repair. We'll put you back into the comfort zone ASAP. Our technicians are experienced, EPA certified, trained, background checked, drug tested, Workers' Compensation insured, uniformed, professional, and honest. They will diagnose your system and provide you with a written estimate for repairs.

Technician working with gauges near condenser
Person working on indoor ac unit

Heating Repair

When your heating fails, our team provides prompt and professional heating repair and furnace repair. We are experts at diagnosing and fixing a wide range of issues. We offer fast emergency heating repair to minimize your business's downtime, delivering reliable heating service that ensures your system runs safely and efficiently all winter. Learn more

Air Quality

Whether you're at home or at work, your health and comfort can be affected by poor air quality. And, the air quality is affected by the air temperature, the humidity, the quality of ventilation and any contaminants or irritants like indoor pets, pollen, dust mites, cleaning products, lead, Formaldehyde and Asbestos, Poor Air Flow, mildew and mold. Poor air quality can cause more than slight discomfort - much more!

Picture of zipper opening up on Los Angeles
HVAC Technician working on a unit on rooftop

Maintenance

As Benjamin Franklin said, an ounce of prevention is worth a pound of cure. Same idea applies to your central heater and air conditioner maintenance.Think of it as an oil change for your auto, which improves your car's engine performance, maximizes your gas millage and minimized down time by avoiding unnecessary repairs.

What our clients say

Shape- Social Media IconShape BG CTA

New In Our Blog

Piggy Bank with cash falling out near AC

2025 Los Angeles Heat Pump Rebates

Los Angeles homeowners can save thousands on heat pump installations with rebates from LADWP, federal tax credits, and incentives from TECH Clean California. Learn how these programs can dramatically lower your upfront costs, boost home efficiency, and contribute to a greener future.

Piggy Bank with cash falling out near AC

What to Look for When Choosing a New HVAC System

Choosing a new HVAC system is a significant investment that requires careful consideration of your specific needs, from the size of your space to your budget and energy efficiency goals. The key to a successful project is not only selecting the right system type and features but also hiring a qualified, professional contractor in Los Angeles for proper and safe installation.

Piggy Bank with cash falling out near AC

Attic Fan Installation for Los Angeles Homes

Boost comfort in your Los Angeles home with attic fan installation. Discover how attic ventilation improves AC efficiency, protects your home, and keeps it cooler—especially when paired with a new AC installation.

Piggy Bank with cash falling out near AC

BWP Heat Pump Rebates & Installation in Burbank | Save Now

Learn how BWP heat pump rebates can lower your AC replacement costs. Maximize heat pump savings—contact LA Construction, Heating and Air for a free estimate.

Piggy Bank with cash falling out near AC

Air Conditioning Service for Los Angeles

Need air conditioning service in Los Angeles? LA Construction, Heating and Air provides expert AC maintenance, repair, and installation to keep your home or business perfectly cool.

Piggy Bank with cash falling out near AC

Commercial AC Repair: Recognizing the Red Flags in Your LA Business

Don't let a failing commercial AC disrupt your Los Angeles business. This guide helps you identify critical signs of trouble, from weak airflow to rising energy costs, ensuring timely commercial AC repair or installation.

We Install and Service All Major Makes and Models