In general, AC tune-ups involve inspecting the unit’s key components to make sure they’re functioning properly, as well as cleaning and lubricating certain parts as needed.

Condenser Unit

During a tune-up, your pro will inspect the condenser unit, which is usually located outside, for signs of wear and tear. They’ll look for damage to the fins, make sure the fan is functioning properly and check for leaks and blockages. They’ll then clean the unit to remove debris, like leaves and dirt, which can obstruct airflow. They may also lubricate moving parts, like the fan motor, if needed.

Refrigerant

Refrigerant is a chemical compound that absorbs heat from inside and releases it outside. Incorrect refrigerant levels lead to inefficient and potentially damaged systems, so your pro will make sure the level aligns with your unit’s specifications. They might also test the various refrigerant lines for leaks.

Air Handler

Located inside your home, the air handler is typically part of the furnace or a standalone unit, and it’s responsible for circulating air throughout your home. Your technician will inspect the handler’s blower motor and its various components. They’ll also check and replace the filter as needed since dirty filters can block airflow.

Ductwork

Your technician will also inspect your ductwork for any leaks, blockages or damage since leaky ducts can significantly reduce the efficiency and effectiveness of your unit. They might also remove debris from the ducts. If the ducts are particularly dirty, your pro might recommend a cleaning to remove dust, debris and any potential for mold growth, but this service usually costs extra.

Electrical

Every AC unit comprises a variety of electrical components that keep it running. Your technician will check the various connections to ensure they’re not showing signs of wear and tear. They’ll also test components, like capacitors, thermostats, contractors and relays to make sure they’re functioning as they should.

Drain System

Your AC unit’s drain system collects and drains the moisture that condenses on the evaporator coil. It typically includes a condensate drain line and a collection pan. Your technician will inspect the drain line for clogs and clean it as needed. They’ll also check for any leaks or signs of damage to the drain pan.

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