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2630 Walnut Ave, Suite G, Tustin, CA Lic. #1062690
24/7 Emergency ServiceCall: (949) 933-3130
Local HVAC – Repair, Maintenance, Install

HVAC, AC & Heating Services in Tustin, CA

Fast, reliable HVAC repair, maintenance, and installation from certified local technicians. Upfront flat-rate pricing, honest recommendations, and a workmanship guarantee on every job. Available 24/7.

★★★★★ 5.0 on Google · 200+ reviews
★★★★★ Yelp · 180+ reviews
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5-Star Rated
Licensed & Insured
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Your local, Tustin-based HVAC team

We don’t just serve Tustin — we’re headquartered right here in Tustin, at 2630 Walnut Ave, Suite G. When you call South County Air Services, you’re calling neighbors: a local Tustin company that can be at your door fast, from Old Town Tustin and Tustin Ranch to Tustin Legacy, Columbus Square, and North Tustin. Being based here means we know the local housing mix — the historic homes near Old Town, the newer builds around Tustin Legacy and The District, and everything in between.

Our licensed technicians cover both Tustin ZIP codes — 92780 and 92782 — with same-day AC repair, furnace and heat pump service, new installations, and maintenance plans. Whether you’re near Tustin Marketplace, the historic MCAS blimp hangars, or Peters Canyon, we respond fast because we’re right around the corner. Call (949) 933-3130 or request service online.

Technician servicing an outdoor AC condenser in Tustin by South County Air Services

South County Air Services provides fast, reliable air conditioning and heating service in Tustin, California. From the historic bungalows of Old Town Tustin to the newer homes of Tustin Ranch and Tustin Legacy, we know the local housing stock well — in fact, our shop is right here in Tustin. We’re a local, family-owned and owner-operated team offering same-day appointments, upfront flat-rate pricing, and 24/7 emergency service.

AC & heating services in Tustin

Maintenance

Spring & fall tune-ups that keep your system efficient and prevent breakdowns.

Tune-ups in Tustin →

Repair

Same-day & 24/7 repair for AC, furnaces, heat pumps and thermostats — all brands.

Repair in Tustin →

Installation

New high-efficiency systems, correctly sized, with financing available.

Install in Tustin →

Why Tustin homeowners choose us

  • Local, family-owned & owner-operated — you talk to a real person
  • Same-day service & 24/7 emergency response
  • Upfront, flat-rate pricing — no surprises
  • Background-checked, factory-trained technicians
  • Licensed & insured (CA License #1062690)
  • 5-star rated on Google & Yelp

Tustin HVAC FAQ

Do you offer same-day HVAC service in Tustin?
Yes: we offer same-day appointments and 24/7 emergency AC and heating service throughout Tustin and the surrounding South Orange County area. Call (949) 933-3130.
How much does a new AC or HVAC system cost?
A typical change-out runs about $5,000 to $12,500 installed; full systems with new ductwork can run higher. We size it right for your Tustin home, offer financing, and give a free in-home estimate.
How long does a new system installation take?
Most standard AC or furnace replacements in Tustin are done in a single day. Jobs with new ductwork can take a few days; we give a clear timeline upfront.

Need AC or heating help in Tustin?

Same-day & 24/7 service across South Orange County.

📞 Call (949) 933-3130

Nearby areas we serve: Irvine · Costa Mesa · Lake Forest

Helpful HVAC Terms

Quick definitions for the parts and terms behind your comfort system.

RefrigerantThe fluid that absorbs and releases heat as it cools or heats your home.R-454B (Puron Advance)The new low-GWP refrigerant in Bryant and Carrier 2025+ systems, replacing R-410A.SEER2An AC cooling-efficiency rating; higher means lower energy bills.AFUEFurnace efficiency rating – the percentage of fuel turned into usable heat.BTUBritish Thermal Unit – a measure of heating or cooling energy.TonA measure of cooling capacity; one ton equals 12,000 BTU per hour.
See the full HVAC Glossary →
Limited-time savings

Current specials & offers

Real savings on the services your home needs — just mention these when you call.

FREE

In-Home Estimate

Upfront, no-pressure pricing on a new HVAC system replacement (not repairs) — free, with no obligation.
No obligation. Cannot be combined with any other offer.

$1,000 OFF

A New Full System

Save $1,000 on a brand-new high-efficiency full HVAC system installation.
On qualifying high-efficiency systems. Cannot be combined with any other offer.

$50 OFF

Any Repair

Save on any HVAC repair — plus a free second opinion on a quoted replacement.
Cannot be combined with any other offer. Mention when you call.
5-star rated

What your neighbors say

Real reviews from real Orange County homeowners.
★★★★★

I cannot thank South County Air Services enough for impeccable customer service. Behshad came out on a Saturday to check my heating unit (failing motor). He was professional, knowledgeable, courteous and thorough – extremely fair pricing, with open and honest communication. Highly recommend. Five star plus!

KM

Kelly M.
Verified Yelp review
★★★★★

Super impressed with our experience. We needed to replace our 40+ year old furnace, and from the first call everything was easy and clearly explained. Responsive, great follow-up, great pricing, timely booking, installers on time and prepared, clean install, no mess left.

DM

D. M.
Verified Yelp review
★★★★★

I am grateful to the technician who inspected my HVAC system today. I feel he did a thorough inspection and told me the truth about my unit. I had two other companies beforehand – the first gave me a report that would call for major expenditure.

EM

Elena M.
Verified Yelp review
★★★★★

You will not find a more honest and knowledgeable HVAC tech. They show up on time and are very professional, but most of all will not try to upcharge you. He could have charged me significantly more but cares about diagnosing the actual problem. I found my HVAC tech – 10 star review if I could!

PV

Pat V.
Verified Yelp review
★★★★★

It’s not often you find an honest business willing to give suggestions over the phone to troubleshoot why my HVAC wasn’t working – without charging me. After a couple minutes we determined my breaker popped and all I needed was to reset it. I appreciate Behshad and will definitely use him in the future.

HJ

Heng J.
Verified Yelp review
★★★★★

I spoke with the owner on a Saturday morning and he was at my house within 45 minutes. Another company wanted $3,000 in repairs; Behshad recommended a simple $250 repair that fixed the issue. Very honest, thorough, and reliable!

AS

Alex S.
Verified Google review
★★★★★

I cannot thank South County Air Services enough for impeccable customer service. Behshad came out on a Saturday to check my heating unit (failing motor). He was professional, knowledgeable, courteous and thorough – extremely fair pricing, with open and honest communication. Highly recommend. Five star plus!

KM

Kelly M.
Verified Yelp review
★★★★★

Super impressed with our experience. We needed to replace our 40+ year old furnace, and from the first call everything was easy and clearly explained. Responsive, great follow-up, great pricing, timely booking, installers on time and prepared, clean install, no mess left.

DM

D. M.
Verified Yelp review
★★★★★

I am grateful to the technician who inspected my HVAC system today. I feel he did a thorough inspection and told me the truth about my unit. I had two other companies beforehand – the first gave me a report that would call for major expenditure.

EM

Elena M.
Verified Yelp review
★★★★★

You will not find a more honest and knowledgeable HVAC tech. They show up on time and are very professional, but most of all will not try to upcharge you. He could have charged me significantly more but cares about diagnosing the actual problem. I found my HVAC tech – 10 star review if I could!

PV

Pat V.
Verified Yelp review
★★★★★

It’s not often you find an honest business willing to give suggestions over the phone to troubleshoot why my HVAC wasn’t working – without charging me. After a couple minutes we determined my breaker popped and all I needed was to reset it. I appreciate Behshad and will definitely use him in the future.

HJ

Heng J.
Verified Yelp review
★★★★★

I spoke with the owner on a Saturday morning and he was at my house within 45 minutes. Another company wanted $3,000 in repairs; Behshad recommended a simple $250 repair that fixed the issue. Very honest, thorough, and reliable!

AS

Alex S.
Verified Google review

Comfort now, pay over time.

$0 down and flexible monthly financing available on qualifying systems, with approved credit.

See financing options

Too hot or too cold?

Let’s make your home comfortable again.

Same-day service from certified local pros — available 24/7.

Book online

(949) 933-3130

HVAC in Tustin: what local homeowners should know

Tustin is really two housing stocks. Old Town Tustin’s historic bungalows and mid-century homes often run original or undersized ductwork and older gas furnaces that waste energy, while the newer Tustin Legacy and Columbus Square builds need right-sized, high-efficiency systems. Our shop is right here in Tustin on Walnut Ave, so we know the local permit process and the older-home quirks — tight attic access, dated wiring, and ducts that have not been sealed in decades. We fix what is actually wrong instead of pushing a full replacement you may not need.

South County Air Services is a family-owned, owner-operated HVAC company based in Tustin, CA (CSLB license #1062690), holding a 5.0-star Google rating across 205+ reviews. We serve all of Orange County 24/7 with flat-rate pricing, and as a Bryant dealer we install, repair, and maintain air conditioning, heating, heat pump, and indoor-air-quality systems. Because the licensed owner runs the jobs — not a commissioned salesperson — our customers consistently say we give honest recommendations and do not upsell.

What Tustin-area customers say

★★★★★

“Behshad was very personable and explained all of the options thoroughly and clearly. The system he quoted was better than our other quote and for less cost.”

— Mike Logan, Google review
★★★★★

“We hired them after our AC broke — easy to contact, and their prices were very reasonable and honest. Behshad is knowledgeable and explained everything clearly.”

— Jonathan Domalanta, Google review
★★★★★

“A wonderful experience with Behshad and his team. They came out quickly, arrived on time, and fixed our HVAC issues with ease. They will be our first call in the future.”

— Chris Connell, Google review

Read all 228 five-star Google reviews →

Common questions from Tustin homeowners

How much does AC repair cost in Tustin?

Most AC repairs in Tustin run about $150–$600 depending on the part — a failed capacitor is roughly $150–$300 and a refrigerant recharge $300–$600, plus a diagnostic fee. We quote a flat rate before any work starts, so there are no hourly surprises.

How much does it cost to replace an AC or HVAC system in Tustin?

A like-for-like AC or furnace replacement in Tustin typically runs $8,000–$14,000, and higher-efficiency or full heat-pump systems $14,000–$21,000+, depending on size, SEER2 efficiency, ductwork, and permit or HOA factors. You get a written flat-rate quote, and we never upsell equipment you do not need.

Do I need a permit to replace my AC or furnace in Tustin?

Yes. California requires a permit for any AC or furnace replacement in Tustin — even a like-for-like swap — plus a HERS test (duct-leakage and refrigerant verification). As your licensed contractor (CSLB #1062690) we pull the permit and handle the inspection, so the work is code-compliant and documented for resale.

How long does an AC system last in Tustin?

With regular maintenance, most AC systems in Tustin last about 12–15 years, and up to about 20 with good care. Tustin’s inland summer heat means longer run times, so skipping maintenance shortens that noticeably.

Why is my AC not blowing cold air?

The most common causes are low refrigerant from a slow leak, a failed capacitor, a frozen evaporator coil, or a clogged air filter. It is usually a repair, not a replacement — we diagnose the actual cause and show you the failed part before quoting.

How often should I change my HVAC filter?

Every 60–90 days for a standard 1-inch filter, or monthly during heavy summer use or with pets. It is the cheapest thing you can do to protect the system and keep energy bills down.

Do you offer same-day or emergency HVAC repair in Tustin?

Yes — same-day and 24/7 emergency AC and furnace repair across Tustin and south Orange County. Call (949) 933-3130 and we will get a technician out fast with a flat-rate price before any work begins.

Who is the best HVAC company in Tustin?

We will let the reviews speak — South County Air Services holds a 5.0-star rating across 200+ reviews. Family-owned, owner-operated, licensed (CSLB #1062690), a Bryant dealer, with flat-rate pricing and no upsells.

Serving Irvine: for a local, family-owned pro see our HVAC company in Irvine — flat-rate pricing, 5.0-star rated, same-day help.

Areas We Serve Across Orange County
Family-owned HVAC repair, installation & maintenance near you
TustinIrvineAnaheimSanta AnaOrangeGarden GroveFullertonPlacentiaVilla ParkYorba LindaWestminsterFountain ValleyHuntington BeachCosta MesaNewport BeachNewport CoastLake ForestFoothill RanchPortola HillsMission ViejoRancho Santa MargaritaCoto de CazaTrabuco CanyonLadera RanchLas FloresLaguna HillsLaguna WoodsLaguna NiguelLaguna BeachAliso ViejoDana PointSan Juan CapistranoSan ClementeCapistrano Beach
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