Failing to keep your central HVAC unit maintained could leave you with no way to keep your home cool this summer. Before you rely heavily upon your air conditioner's cooling capabilities this season, schedule an A/C tune-up.

A licensed HVAC contractor can be hired to perform a comprehensive tune-up. A tune-up involves inspecting, cleaning, and repairing HVAC components. A tune-up will ensure that an HVAC unit is working efficiently and safely. This article discusses parts of an A/C unit that are commonly looked at during a tune-up.


The condenser transfers heat. Central HVAC systems often contain a large condenser unit that is positioned outdoors. During a tune-up, the contractor will inspect the coils, fan, motor, and casing that comprise the condenser. They will clean the cover, plus ensure that there is no debris that is restricting the fan from moving.


The contractor will check the ductwork, making sure that it is properly insulated. They will check the integrity of each ductwork section. Then, they will use a vacuum process to remove dust that is inside the duct chambers.


The coolant level may need to be replenished. The contractor will take off the cover to the inside of the HVAC unit. They will access the coolant tank. They will determine if the coolant level is adequate or if it will need to be recharged.

Electrical Components

An analysis of the unit's electrical system will ensure that the electrical parts are connected properly. If any wires or other mechanical parts are loose, the contractor will tighten them. If any wires are frayed, they will be replaced.


The lubricant that is applied to metal components reduces friction. This prevents metal parts from becoming worn out. It also ensures free movement of metal parts. The contractor may use a spray lubricant to treat metal. 


The thermostat displays the temperature and triggers the air conditioning system to turn on and off. The contractor will remove the faceplate from the thermostat. They will test the batteries that are located inside of the unit. They will make sure that the wires are attached properly.

A calibration system may be used to determine if the thermostat is providing accurate temperature readings. If a thermostat is not working properly, the contractor may need to upgrade the unit. 

Testing Process

Once all of the steps of the tune-up are complete, the contractor will turn on the air conditioner and make sure that it is blowing cool air consistently from all of the vents.

For more information on A/C tune-ups, contact a company near you.