Short answer
A real AC tune-up includes coil cleaning, capacitor and contactor testing, refrigerant pressure and temperature checks, blower and motor amp readings, condensate drain flushing, filter replacement and a written report of readings.
Outdoor unit
Electrical and coil work.
- Clean condenser coil
- Test capacitor µF
- Inspect contactor
- Fan motor amps
- Tighten electrical connections
Indoor unit
Airflow and drainage.
- Replace filter
- Inspect blower wheel
- Check coil
- Flush drain and test float switch
Performance
Readings you should get in writing.
- Supply and return temperatures
- Refrigerant pressures, superheat or subcooling
- Thermostat calibration
Questions
How long does an AC tune-up take?+
Typically 60–90 minutes per system when done thoroughly.
Editorial note: this guide is general information for homeowners, not a diagnosis. Desertline Heating & Air is a referral service; a licensed contractor should inspect your equipment before repairs.