Nobody loves needing HVAC repair for their home. But, when you work with Hall’s HVAC in Southern Maryland, we make handling HVAC repair and maintenance as easy as possible. If you aren’t sure whether or not it’s time for HVAC repair, keep reading to learn 10 common signs that it’s time for HVAC repair. And, as always, you are welcome to give us a call at Hall’s HVAC in Southern Maryland with any questions or concerns!

Changes in Utility Bills

Whether it’s the middle of summer or deep in the heart of winter, your energy bills should stay fairly consistent. They should steadily climb as the temperatures get colder or warmer, but not dramatically spike. If you notice that your energy bills have spiked recently, it could be a sign that your HVAC system is in need of HVAC repair. Your furnace or AC unit could be working overtime due to obstructed ducts, malfunctioning equipment, or other variables. This, in turn, causes your energy bills to spike!


HVAC systems are typically built to last. However, nothing lasts forever. On average, you can expect your HVAC system to make it about 10 years (assuming you have regular maintenance done) before you start seeing any problems. As it starts to age, it will become less efficient and will need repairs more frequently. After your system has hit the 10-year mark, make sure you are keeping up with the HVAC maintenance more frequently than you might otherwise. This can help you keep tabs on your system and help you avoid HVAC repairs as much as possible. 

Loud Noises

AC units and furnaces are naturally a little bit noisy. There are newer, more quiet models available, but no HVAC system is completely silent. If you hear your AC unit or furnace suddenly start making loud screeching, grinding, metallic, banging, or any other unsettling noises that it’s never made before, give us a call. Our HVAC repair team at Hall’s HVAC in Southern Maryland will get to the bottom of your issue quickly and resolve it in no time!


Sometimes when HVAC systems are in need of HVAC repair, they can emit subtle odors that increase over time. Some people claim it smells like dirty socks, but in general, it’s usually a musty and damp odor. This could be due to any number of issues like mold, bacteria build-up, incorrect coolant levels, broken parts, and more. If you notice a new smell in your home that smells musty, that could be a sign that you need HVAC repair services (or maybe you just need to do laundry).

No Heat

This may seem obvious, but it’s definitely a sign. If your furnace isn’t putting out warm air, it’s definitely time to contact an HVAC repair service. A professional HVAC company like Hall’s HVAC in Southern Maryland will get your heat back up and running in no time!

No Cold Air

This is another sign that may leave you thinking, “well duh,” but it’s a classic tell-tale sign. In the middle of summer when your AC unit isn’t pumping out cool air from the vents, give an HVAC repair service a call. Whether you need a new AC unit or a quick, one-hour HVAC repair, the faster you reach out, the sooner you’ll be back in business.

No Airflow

In some homes that need HVAC repair, homeowners hear the HVAC system turn on but have weak to no airflow. This could mean you have obstructed ducts, a faulty blower, or another HVAC malfunction. When your home has no airflow, either you need HVAC repair, or you’ve closed all of the vents. 

It’s Extra Humid Inside

One perk that AC units offer that most homeowners don’t know about is that they create a less humid environment in your home. When your home feels more sticky and humid than it normally does, this could mean that your AC unit is in need of HVAC repair services or is even due for replacement. 

Hot or Cold Spots in Your Home

Believe it or not, HVAC repair services deal with more than AC units and furnaces. HVAC repairs are sometimes focused on repairing or changing the ductwork in your home to more evenly distribute the warm or cold air throughout your home. If you have a room that is always much hotter or colder than the rest of your home, an HVAC repair technician can help!

You’ve Forgotten Maintenance Regularly

Regular HVAC maintenance is incredibly important. Just like you regularly change the oil in your car, rotate your tires, and replace your air filter in your car (hopefully), your HVAC system needs a little attention now and then. Air filters should be changed regularly and you should have a professional come for a quick inspection and routine maintenance twice a year. At Hall’s HVAC in Southern Maryland, we recommend having a technician out once in the fall before the winter hits and once in spring before the summer heat comes along. 

Hall’s HVAC in Southern Maryland

Here at Hall’s HVAC in Southern Maryland, our goal is to provide professional, helpful, and affordable HVAC services to our community. We are experts with years of experience in the industry and have seen nearly every HVAC problem there is! If your home is showing any of the signs listed above, be sure to reach out to our friendly staff for HVAC repair services right away.