our blog post

Common AC Problems

Nov 3, 2023 | HVAC Services

AC units are essential for long-term comfort in any facility, whether residential or corporate. The best way to prevent AC complications is to know what to look for. 

Since awareness is the first step to a solution for any problem, it’s helpful to understand what common AC problems might be affecting your system’s operation and efficiency. Let’s take a closer look at the signs of the most frequent air-conditioning unit challenges. 

Identifying Common AC Problems 

With proper maintenance check-ups and careful monitoring, your HVAC unit will last longer and perform better. When checking your AC units for issues, here are the main factors that may be causing you problems:

AC Not Turning On

If there is a problem with wiring or an internal part, your AC unit may not be able to run at all. First, make sure the circuit breaker connected to your AC is functioning properly. If so, you’ll want to call in a pro. 

Unless you have training and experience with repairs and maintenance for HVAC systems, you’ll likely need to contact a professional service provider (like Highland AC) to assess the problem and identify the appropriate solution. 

Only Hot Air 

In the middle of summer or after a long day, the last thing you need is your AC unit blowing lots of hot air into your home or office. This is usually caused by unclean air filters, something blocking the air ducts, or low levels of refrigerant. 

Air filters should be replaced every one to six months, depending on the type of unit in your home or building. Many homeowners can do a visual inspection of their vents to check for any blockages. But if neither of those solutions corrects the problem, you’ll need to have the system serviced by a professional. 

Compressor Problems 

If your AC unit is unable to complete full cycles correctly, it can damage the internal compressor. The compressor is the heart of the AC unit. If it fails, the entire unit won’t work. Compressor issues are often caused by a lack of maintenance or by a power surge. To fix this, the compressor will need to be replaced. Contacting your HVAC professional sooner rather than later can prevent further damage to other parts of the system — and get you back to cool, refreshing air again.

Weird Noises 

Uncommon noises are usually a sign of an underlying issue that needs attention. These noises are often caused by a fan malfunction. The fans in an AC unit help to circulate the air, so if the fans are not working properly, the AC unit will not be able to cool effectively. 

To fix this, the fans will need to be repaired or replaced. If this red flag appears in your home or office, contact a pro for support as soon as possible. 

Unit Leaking Fluids

While minor condensation is not unusual, high moisture levels around your unit may be a sign of a leak — perhaps a severe one. This could be due to blocked pipes or issues with the internal pumps. Leaving leaks unchecked can lead to problems with the compressor. You’ll definitely need an HVAC service provider to inspect it for you.

Faulty Thermostat

The thermostat controls the temperature in your home. If it is not working properly, it can cause the AC unit to not turn on or off when it is supposed to. To fix this, the thermostat will need to be replaced or repaired.

Clogged Coils

Clogged coils are one of the most common AC problems. The coils in an AC unit are responsible for absorbing heat. If they become clogged with dirt or debris, they will not be able to function properly. This can lead to a number of problems, including:

  • Reduced airflow
  • Increased energy consumption
  • Reduced cooling efficiency
  • Ice buildup
  • System damage

Tips for Preventing Common AC Problems

If you’re experiencing any of these problems with your AC unit, it’s important to call a qualified technician to diagnose and repair the problem. If you’re not 100% certain about the cause of the problem, don’t attempt to fix the problem yourself, as you could make it worse. 

However, there are some steps you can take to avoid the most common AC problems. Here are some tips to help prevent future issues:

  • Change the air filter every 1-3 months
  • Have your AC unit serviced annually by a qualified technician
  • Keep the condenser unit free of debris
  • Inspect the coils for damage or leaks
  • Do not overload your AC unit and run it at a higher capacity than it is designed for
  • Close the vents in rooms that are not being used
  • Keep the thermostat set at a consistent temperature … and leave it there

HighlandAC and Your Unit Solutions

Highland AC offers complete HVAC services to both commercial and residential properties in the greater San Antonio area. Our team is able to solve all common AC problems and needs — whether it’s a new installation, retrofit, repairs, or seasonal maintenance. 

Highland AC has an impressive track record of almost 50 years in the HVAC industry. We’re dedicated to delivering top-notch services that guarantee your space is consistently comfortable any time of the year. 

If you need assistance with your HVAC unit, contact us today and we’ll happily assist you. Keeping Texas cool has been our priority since 1976. 

Explore 0% APR financing or monthly payment options for our services!*
*0% interest is for promotional period only. Does not affect credit score.