The Ultimate Guide to Common HVAC Issues

After over 35 years in the industry, we are well aware of the stress a broken AC system can bring on you and your family. While some issues can be self-diagnosed and solved on your own, others cannot. We want to help with all of your AC needs, which is why we created the ultimate guide to common HVAC issues. From small fixes like replacing filters all the way to replacing your AC unit, Comfort Temp is here to serve you. 

Do-It-Yourself Fixes

Although your HVAC unit is a complex system, some issues can be simple to solve and save you money! If your AC unit is experiencing unknown difficulties, a great place to start is by checking these basic troubleshooting tips before giving us a call.

Dirty Filter

A dirty filter means your filter is doing its job. But when the filters become oversaturated with filth, it restricts airflow to your unit. Without proper airflow, your unit will work harder than necessary to cool your home. This can cause your unit to overheat and stop working altogether. 

However, the easiest way that you can maintain your AC unit and prevent damage is by changing your filter regularly. You should replace your filter every month or two months depending on the filter type and household conditions.

Expert tip: “A dirty or clogged filter can increase your monthly energy costs drastically”

Thermostat Issues

The thermostat is the headquarters of your HVAC. Check your thermostat for dead batteries and set it at an appropriate temperature. If these are not a fix, ensure your thermostat is programmed correctly. Now is a great time to get out that instruction manual hidden in the junk drawer! However, if these basic tips don’t work, you may need to call in one of our professionals.  

Blocked Vents

In order for your AC to cool your home with air, it first needs to take in air. Check to make sure the intake vents in your home are not blocked by furniture or decor. Similarly, clear debris such as leaves, mulch and branches from around your outdoor unit. Lastly, check to see if the coil fins on your outdoor unit are bent out of place. 

Expert tip: Keep furniture at least 2 feet away from indoor intake vents inside, and keep plants, mulch and other debris at least 3 feet away from your outdoor unit. 

Electric Connection

Your AC can experience electrical problems similar  to other appliances in your home. Here’s a short checklist to troubleshoot AC issues: Did your AC get disconnected from a power source? Has your circuit breaker tripped? If these two questions do not lend a quick fix, it is necessary to call a professional to identify the problems within the complex wiring and electrical circuits. 

When to Call In 

The longer AC issues persist, the more likely it is that your AC unit will fail or sustain permanent damage. When in doubt, call us today to schedule AC repair. 

Unusual Noises 

It is normal to hear your air conditioner running. What you should be looking out for is abnormal sounds, such as squeaking or hissing. A hissing sound may be coming from a refrigerant leak. Squealing or screeching could mean a defective fan motor, belt or compressor. If you hear an odd raucous, report the sound to our team of professionals. 

Low Refrigerant Levels

Refrigerant is the element responsible for cooling the air that circulates through your unit. When refrigerant levels are low, sometimes due to a leak, the temperature in your home can vary. Low refrigerant levels can cause even larger issues, such as a frozen AC unit, low efficiency levels, and compressor damage.

Frozen AC Unit

A frozen AC unit can catch you by surprise, especially in the heat of the summer. If you notice ice forming around your outside unit, the best thing to do is shut your AC off. Your air conditioning unit can freeze for a number of reasons, including dirty filters, low refrigerant levels, a malfunctioning blower motor, and more. If not treated properly,  freezing can lead to permanent damage to your unit. 

Expert Tip: Read more about frozen AC units in our past blog


HVAC units naturally leak a small amount of condensate, so don’t be alarmed if you see some water dripping from your outdoor unit.  However, if you notice large leaks, that may be an indication of a major issue with your unit.

 Leaks can be extremely damaging to your unit and the interior of your home. Water damage is not easy to repair. Leaks could come from a clogged condensate drain line, broken parts or other causes, and they can be hard to identify. 

Expert Tip: Dirt build up in the condensate drain line can cause leaking. It is important to keep your drain pipes clean and clear on a regular basis! 

Your HVAC Repair Go-To’s

You can trust the professional team at Comfort Temp with all your AC service needs. Through every season, we are here to create comfortable spaces and deliver you peace of mind. Check out our services and call us for 24/7 emergency repairs. Serving all of your HVAC needs in Gainesville and Jacksonville!

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