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Updated on 25 May 2024 10:49
All countries
Updated on 25 May 2024 10:49
All countries
Updated on 25 May 2024 10:49

Common Causes of AC System Failure

Functional air conditioning can be necessary for your home. An AC unit can fail without warning, which can be frustrating if you are experiencing extremely warm weather.

Understanding the common causes of AC system failure can help with timely troubleshooting and avoiding costly AC repairs.

Here are some of the common causes of AC system failure:

Lack of Maintenance

Over time, your system’s parts may wear down from constant use, leading to system malfunctions. Basic upkeep tasks like cleaning or substituting your air filters, confirming parts are well-lubricated, and monitoring refrigerant levels can help avoid this problem.

Without proper maintenance, your system may fail to cool your home consistently, which can lead to increased energy bills and potentially decrease the lifespan of your system. Your system may produce strange noises and odors, potentially indicating a severe problem that could lead to costly AC repairs.

Dirty Air Filters

Air filters regulate the air quality in your home and prevent harmful particles from entering your home. Over time they can become clogged with dust and debris, causing poor airflow and making it difficult for your system to operate efficiently.  The decreased airflow can lead to poor air quality, which can cause respiratory problems for you and your family.

Refrigerant Leaks

Refrigerant leaks can occur in your system for various reasons, such as corrosion, poor installation, or an accident. The refrigerant in your system works to cool the air that circulates in your home. Leaks in your system’s refrigerant can severely impact your unit’s ability to maintain cool temperatures in your home.

Refrigerant leaks could result in decreased efficiency, decreased system performance, and potential damage to your system. Depending on the size of the leak, the refrigerant can seep into your home, posing a potential health hazard.

Faulty Thermostat

The thermostat is the control center of your air conditioning unit and runs your home’s temperature. A malfunctioning thermostat can cause the AC system to stop working when it’s needed the most.

If the thermostat is not working correctly, it may not signal the air conditioner to turn on or off at the appropriate times, leading to increased energy consumption, decreased comfort levels, and unnecessary wear and tear on the system.

Frozen Evaporator Coil

The evaporator coil is responsible for removing the heat and humidity from inside your home. Dust and debris accumulating in the coil can cause the coil to freeze, resulting in restricted airflow and limiting cooling. The frozen coil can also cause the compressor to overheat, leading to a system breakdown and costly repairs.

Improper Sizing and Installation

An AC unit that is too small can fail to cool the home adequately, while an oversized AC unit may lead to higher energy bills, poor humidity control, and decreased comfort. An improperly installed AC unit can cause system breakdowns, reduce efficiency, and cause unusual noises. Work with professional HVAC technicians that can help you select the right size and install the system correctly.

Read Also: A Guide to Popular Microfiber Cloth Cleaning Products

Hire a Reputable AC Repair Company

Schedule regular maintenance visits with a reliable HVAC company to confirm your air conditioning system operates optimally. They can diagnose and repair minor issues before they turn into costly repairs and help you avoid deadly heat during the hot summer months. By being proactive, you may prolong the lifespan of your AC system and increase your home’s energy efficiency.


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