10 Signs that Say Your HVAC Needs to be Repaired or Replaced

Young black man repairman checking an outside air conditioner unit close up

We rely on our heating and cooling systems practically every day. If it’s hot outside, you’ll want to come home to a fresh and cool environment. If the weather is cold, you’re looking for a cozy and warm place. Sometimes, we forget to check up on our HVAC units and find ourselves in sticky situations. 

Worst case scenario, you could be left without warm or cold air if you don’t take a look at your HVAC unit now and then. Looking out for red flags can also help you ahead of time. We discuss nine major signs that indicate your HVAC system needs attention or a full-on replacement. 


This is one of the immediate signs that your HVAC unit is failing. Leaks can be found either on the inside or the outside of your home. They’re rather easy to spot and you’ll know when it’s induced by your HVAC. Spotting outdoor leaks might be trickier, but you should call a professional to assess the condition right away. 

Indoor Humidity 

Humidity, for the most part, is unavoidable, especially here in Florida. It’s a part of nature, but you shouldn’t experience extreme levels of humidity in your home either. HVAC units are designed to keep moisture out and preserve cool air inside. It doesn’t matter whether it’s in the summer or winter. If your home feels sticky or stuffy, your unit needs repairs. 

Pungent Odors 

Bad smells in your home? It can be associated with many things, but what you’ll want to check for sure is your HVAC unit. Most people who have complained about burning or rotting smells have found that their HVAC was failing or was in dire need of repair. If these smells are lingering, get your system checked as soon as possible. 

Faulty Thermostat

Another big red flag is a faulty thermostat. Some people don’t worry about a faulty thermostat because they feel it’s just a problem with the thermostat. What most people don’t know is that it lies deeper. Your thermostat might not be responsive due to a bigger system, which is your HVAC unit. If your thermostat says one thing but if the climate in your home feels way different, the issue lies within the whole unit. 

Damp or Moist Spots 

Similar to leaks, if you find spots in your home that are supposed to be dry, this could indicate a problem within your HVAC unit. Damp or moist spots are often caused by a leak in the refrigerant or the conduit that disposes of condensation could be broken or blocked. Either way, have a professional assist you with a replacement. 

Slow Airflow 

Feel like the house is getting cold enough? The minute you turn on your air conditioner, your house should be able to cool down within the next ten minutes. If your air conditioner isn’t releasing enough air within a certain time, this might determine a problem within the entire unit. There might be something in your unit worth taking a look at. 

Old Age 

There is no compromise when it comes to an old HVAC unit. When your HVAC has reached its time, you must get it replaced. Oftentimes, there is no way around an HVAC unit. If you hang onto an old and outdated system, it’ll be harder to receive high-quality cooling and heating. 

Expensive Bills 

Every homeowner knows what their monthly utility bills come out to be. If the bill for your air conditioning or heat unit increases dramatically, don’t be afraid to shy away from the problem. Call an HVAC contractor to determine how your unit might be causing a big dip in your bill. 

Odd or Unusual Noises 

It’s normal for your HVAC unit to conduct some kind of white noise. That’s just the air flowing throughout your home! What you should be worried about is loud, sudden noises. Some of these noises can be described as squealing, clicking, grinding, or popping. If these noises continue, call a technician to conduct a quick run-down. 

Inability to Control Temperature 

This also ties in with a faulty thermostat. You might also find that some rooms are cooled faster than others. Other rooms might not be receiving enough cool air. This could be due to poor engineering or insulation, but it could also be due to a lack of quality with your unit. 

Custom Cooling & Heating: Here to Help Manifest Comfort at Home! 

The professionals at Custom Cooling & Heating know everything there is when it comes to quality airflow in your home. Whatever kinds of problems you are facing, you can confide in us to fix them. Contact us today to learn more about how we can help you with your HVAC unit.