Air conditioners are complex machines, and even the highest-quality HVAC system can break. However, there are a number of common causes that we see at Hughes Mechanical. Here are the most common problems we see when investigating a failed HVAC system.


Your air conditioner is cooled before it gets sent out into the room. The chemical that makes this possible is freon, commonly known as refrigerant. If your air conditioner is low on refrigerant, either due to a leak or lack of service, your air conditioner won’t be able to cool the air as efficiently. This forces you to run the unit longer and more frequently in order to reach a certain temperature. Refrigerant is also harmful to the environment, so repairing any leaks before they become severe is incredibly important.

Faulty Wiring

In many instances where an air conditioner was installed by a less experienced technician, the unit may cease functioning due to faulty wiring. Air conditioners are complex pieces of equipment and should always be installed by a licensed technician. Faulty wiring can lead to problems with your system down the road.

Clogged Filters And Air Ducts

Since your air conditioner brings air from outside your home, it must filter out the dust, dirt, and debris before sending the air into your home. If your filter isn’t replaced frequently, it can become clogged, allowing dirt to collect in the air ducts. Over time, this can cause the coil to freeze. While this is an easy fix early on, it can result in complete failure of your system when left unchecked.

If you’re looking for air conditioner repair in Denver, call the experts at Hughes Mechanical. We’ll get your air conditioner back on track.