Home / Tune-up checklist

What a good AC tune-up should include

Not every "tune-up" is the same. Use this list to know what to expect, and to ask about anything that gets skipped.

Outdoor unit

• Capacitor tested with a meter, not just looked at
• Contactor checked for pitting or burn marks
• Coil cleaned and fins inspected
• Fan motor and blade checked
• Refrigerant pressures checked against the manufacturer's specs
• Electrical connections tightened and inspected for corrosion

Indoor unit

• Filter checked or replaced
• Blower wheel inspected for dust buildup
• Evaporator coil checked
• Condensate drain line and safety float switch tested
• Temperature difference measured between supply and return air

Thermostat and ducts

• Thermostat calibration and schedule checked
• Visible ductwork in the attic checked for disconnected or crushed runs