When performing AC maintenance in Durham, NC, you need to make sure you work with an HVAC company that knows what they are doing. If you miss certain steps in the AC tune-up process, you can do more harm than good to your air conditioning system. For instance, failing to thoroughly inspect the internal components and repair a minor issue can lead to unnecessary wear and tear on your system. This will reduce its lifespan and force you to replace your AC system much sooner than you otherwise would have needed to. Also, failing to replace clogged air filters can cause your AC to run harder than it should, resulting in an inefficient system and excess energy usage.