What maintenance should be done on an AC unit yearly?

Yearly AC maintenance should include a professional tune-up that inspects, cleans, tests, and calibrates the cooling system. Most problems start with restricted airflow or dirty coils, which raise energy use and stress key components.

Our technicians see this often in the Valley; Scottsdale heat and dust make coil cleaning and drain checks especially important. A membership option like our Energy Savings Agreement Plan provides scheduled maintenance designed to improve efficiency, reduce breakdowns, and extend equipment life.

What a thorough annual visit typically covers:

• Replace or clean air filters to restore airflow.
• Clean evaporator and condenser coils; inspect the outdoor unit and refrigerant lines.
• Check refrigerant levels and test electrical components and connections; verify safe operation.
• Inspect and clear the condensate drain, calibrate the thermostat, lubricate moving parts, and run final system checks.

If you notice unusual noises, weak airflow, or water near the air handler, schedule service before peak heat arrives. <br/> Updated: 2026-04-30 <br/> Need help in Scottsdale, AZ? Call (480) 808-7512 or book online. "We've been very happy with our maintenance service on our HVAC unit from Western States Home Services" — Cynthia Marin