About Proair Air Conditioning Services

What we do

Our work falls into three plain categories: air conditioning and heating repair, AC and heating system installations, and preventative maintenance and tune-ups. Around those we handle ductless mini splits, heat pumps, wall heaters, ductwork, indoor air quality and light commercial equipment. You can see each one on our air conditioning, heating, indoor air quality and commercial HVAC pages.

• Repair: AC repair, furnace repair, heat pump repair and wall heater repair.
• Installation: new AC systems, furnaces and ductless mini splits.
• Maintenance: AC tune-ups and furnace tune-ups.
• Commercial: rooftop unit service and commercial repairs.

How we approach a service call

A good visit is simple. We find the actual fault before talking about parts, explain what we found in plain language, and give you a clear price before any work starts. When the job is done we test the system so you can see it working.

That is also what people notice when they write about us. Reviewers on Google mention clear explanations, technicians who came prepared and problems found quickly.

1. 1

   You call us

   Tell us what the system is doing, any sounds or smells, and whether you own or rent.

2. 2

   We arrive with the tools

   The meters and gauges come with us, so testing starts at the unit.

3. 3

   We diagnose the fault

   We test before we talk about parts, because a guess can sell you the wrong one.

4. 4

   We explain it and give the price

   You hear the fault in plain words and the number before any work starts.

5. 5

   We test afterward

   We run the system after the repair to confirm it works.

Why local housing shapes our work

South Gate is not a new-construction city. Almost half of its homes were built between 1940 and 1959, according to the city’s housing element, and many of them were never designed for central air. That means tight attics, short crawlspaces, small electrical panels and original wall heaters. It also means many of the homes around us are rentals, since about 55 percent of occupied units here are tenant-occupied.

Those details change how a job should be sized, routed and permitted. A system chosen by matching the old nameplate often ends up wrong for a home that has changed over 70 years, which is why load calculations and duct testing come up so often across this site.

Where you can find us

We are in USA Business Park at 13440 Paramount Blvd f, South Gate, CA 90280, open Monday to Saturday from 9:00 AM to 5:00 PM and closed Sunday. From here we reach the cities around South Gate, including Downey, Lynwood, Huntington Park and Paramount. See every city on our service areas page.

Paramount is about 2 miles from the shop, Downey about 3.1 and Lynwood about 3.9. Compton and Bell Gardens are about 5.2, Cudahy about 5.8, Walnut Park about 6.4, Bell about 7 and Huntington Park about 7.2. Those are distances to each city’s center, not arrival times. We also cover more of Los Angeles County and north Orange County, and for the farthest areas it is best to call first and confirm scheduling for your address.

We are not a round-the-clock service. If something fails while we are closed, our emergency HVAC page shows what to do until the shop opens again.

What people say about us

We hold a 4.8 rating from 16 Google reviews as of October 30, 2026. You can read all of them, including the critical one, on our reviews page.

The same themes come back across them: a technician who explained the issue clearly, filters and thermostats replaced, a blower motor replaced, refrigerant recharged, a furnace installed and quick check-ups. The one critical review sits there in full beside the others, because a rating means more when you can read the low end too.

The name and number behind Proair

You will see two names. Proair Air Conditioning Services is the name we work under, and the state lists the license as Pro Air Air Conditioning Service Inc, so search the CSLB lookup by number instead of by name. C-20 is the Warm-Air Heating, Ventilating and Air-Conditioning classification. California requires contractors to show the license number in all advertising, which is why ours appears on this site.