A good Tucson AC tune-up happens between March and May, and it should cover electrical parts, refrigerant-side checks, airflow, coils and drains. Climate Pros Tucson matches you with a licensed pro, and this checklist helps you tell a real visit from a thin one.

Why March to May?

The airport’s normal high climbs from 75.8F in March to 91.8F in May and 101.2F in June (1991-2020 normals). A weak part found in April can be replaced before it fails on a 100F afternoon, and Tucson averages about 68 of those a year.

What should a real tune-up include?

Electrical

  • Test the capacitor and contactor and look for burned or pitted contacts.
  • Check wire connections and the breaker.
  • Check the fan motors’ amperage against the nameplate.

Refrigerant side

  • Check the refrigerant charge using measurements, not a guess. Low refrigerant means a leak, so ask about a leak search.
  • Check pressures or temperatures, as the pro’s method requires.

Airflow

  • Check the filter, blower and return path.
  • Look at the indoor coil.

Cleaning and drains

  • Rinse the outdoor coil. Desert dust builds up on it, and dust storms during the monsoon add to it.
  • Clear the condensate drain and check any float switch.

Controls and rooftop units

  • Test the thermostat and calling signals.
  • On a roof-mounted package unit, check that panels are secure and that the unit, curb and drain are in good shape.

What does a cheap visit leave out?

A quick “check” that skips the electrical readings or the coil is not a tune-up. Ask what measurements they take and whether you’ll get them in writing. A visit that only changes a filter is a filter change.

Is a rebate available?

As listed by TEP in October 2026, the Efficient Home program offers up to $160 total for an AC tune-up through participating contractors: $80 for a refrigerant charge repair, $40 for indoor coil cleaning and $40 for outdoor coil cleaning. Each depends on the work performed. Confirm with TEP at 866-473-8761 or ask the pro.

What can you do before the pro arrives?

Change the filter, clear plants and debris from the outdoor unit, and note any odd sounds or weak rooms. Our pre-summer heat prep checklist covers the homeowner side.

Related: how to clean AC coils, AC tune-up cost and our AC tune-up service. See the HVAC maintenance service and the Tucson HVAC hub.

When is a tune-up the wrong product?

If the system already isn’t cooling, you need a diagnosis, not a tune-up. Ask the pro to price the repair first.

When to call us

Book the visit in spring, before the first 100F stretch. Call (520) 353-2520 and we’ll match you with a licensed local pro.