5 Most Common Causes of HVAC Repairs: so you don't get taken advantage of

When your HVAC system starts acting up, it can be a source of frustration and discomfort, especially during extreme weather conditions. Whether it's a sweltering summer day or a freezing winter night, having a malfunctioning HVAC unit can disrupt your comfort and peace of mind. In this guide, we'll explore some of the most common HVAC repairs homeowners encounter and how to address them effectively.

Understanding HVAC Systems: Before delving into specific repairs, it's essential to have a basic understanding of how HVAC systems work. HVAC, which stands for Heating, Ventilation, and Air Conditioning, is responsible for regulating temperature, humidity, and air quality within a building. These systems consist of various components, including furnaces, air conditioners, heat pumps, ductwork, thermostats, and more.

Common HVAC Repairs:

1. Clogged Air Filters:

One of the most common HVAC issues is a clogged or dirty air filter. Over time, air filters accumulate dust, debris, and other pollutants, reducing airflow and efficiency. This can lead to decreased indoor air quality, increased energy consumption, and strain on the system. Regularly replacing or cleaning air filters can prevent this problem and prolong the lifespan of your HVAC unit.

2. Refrigerant Leaks:

Refrigerant is crucial for the cooling process in air conditioners and heat pumps. If there's a leak in the refrigerant lines, it can cause the system to malfunction and fail to cool properly. Signs of a refrigerant leak include reduced cooling performance, ice buildup on the evaporator coil, and hissing sounds coming from the unit. A professional HVAC technician can locate and repair the leak and recharge the system with refrigerant as needed.

3. Faulty Thermostat:

The thermostat is the control center of your HVAC system, regulating temperature settings and activating heating or cooling as needed. A faulty thermostat can cause inaccurate temperature readings, cycling issues, or complete system failure. Common causes of thermostat problems include dead batteries, wiring issues, or calibration errors. Resetting the thermostat, replacing batteries, or recalibrating the settings can often resolve minor issues, but professional assistance may be required for more complex problems.

4. Electrical Component Failures:

HVAC systems rely on various electrical components, such as capacitors, relays, and contactors, to operate efficiently. Over time, these components can wear out or fail due to electrical surges, corrosion, or age. Symptoms of electrical component failures include frequent system cycling, strange noises, or the system not turning on at all. It's crucial to address these issues promptly to prevent further damage to the system and ensure safe operation.

5. Dirty Coils and Components:

Dirt, dust, and debris can accumulate on the evaporator coils, condenser coils, and other components of your HVAC system, hindering performance and efficiency. Regular maintenance, such as cleaning coils and inspecting components, can prevent buildup and ensure optimal operation. Professional HVAC technicians have the expertise and tools to clean and maintain HVAC systems effectively.


HVAC repairs are an inevitable part of homeownership, but understanding the common issues and how to address them can help minimize disruptions and expenses. By staying proactive with maintenance and promptly addressing any problems that arise, you can keep your HVAC system running smoothly and efficiently for years to come. If you encounter complex or persistent issues, don't hesitate to seek professional assistance from qualified HVAC technicians.

Here at Kennon Heating & Air Conditioning we want you to enjoy your home to the fullest. That starts with making sure that the air in your home is clean and at the perfect temperature for you. If we can help in any way, please contact us via email or phone (678) 251-9776. Stay cool, stay cozy.

We proudly serve all of North Metro Atlanta to North Georgia, including Cumming, Alpharetta, Atlanta, Braselton, Buford, Cobb County, Dacula, Dawsonville, Dultuh, Flowery Branch, Gainesville, Hoschton, Jefferson, Johns Creek, Peachtree Corners, Lawrenceville, Norcross, Oakwood, Sugar Hill, Suwanee and more.