Orange County coverage
HVAC Services Across Orange County
AC repair, installation, heating, and 24/7 emergency HVAC for every Orange County community — coastal corrosion expertise, inland-heat sizing, and 25 years of licensed C-20 work.
- 25 Years in Business
- 24/7 Emergency Service
- CA C-20 License #1094200
- Parts & Labor Guarantee
- Lifetime Guarantee
- Discounts Available
HVAC service built for Orange County
Orange County's comfort challenges come in distinct flavors, and United Heating & Air Conditioning has spent 25 years learning every one of them. The coastal cities — Huntington Beach, Newport Beach, Laguna, Dana Point — fight salt-air corrosion that quietly shortens equipment life. The inland corridor — Anaheim Hills, Yorba Linda, Tustin — runs hot enough that undersized or aging systems simply can't keep up.
OC's master-planned history also means housing built in waves: Mission Viejo's 1970s villages, Irvine's decade-by-decade communities, Aliso Viejo's 1990s build-out. Entire neighborhoods reach equipment replacement age together, and we've become the contractor families call when the original builder-grade system finally gives out — because we know these floor plans and their systems before we even arrive.
Across all of it: licensed C-20 work, HOA requirements handled routinely, honest repair-or-replace guidance, and 24/7 emergency response from the county line to San Clemente.
Orange County service pages
AC Repair in Orange County
24/7 AC repair across all of OC — coastal corrosion expertise, builder-grade system know-how, parts & labor guarantee.
View pageAC Installation in Orange County
Right-sized replacements for OC's microclimates — coastal-rated equipment, HOA handled, lifetime guarantee.
View pageOrange County cities we serve
Every city below links to its own local service page. Don’t see yours? If it’s in Orange County, we cover it — call (818) 817-6005.
HVAC Emergency?
No heat. No cooling. No waiting until morning.
We answer 24 hours a day, 7 days a week — nights, weekends, and holidays — across all of Los Angeles County and Orange County.
Our services across Orange County
AC Repair
Fast, guaranteed AC repair for every major brand — backed by 25 years of experience and a parts & labor guarantee.
Learn moreAC Installation
Right-sized system selection, licensed installation, and a lifetime guarantee on our workmanship.
Learn moreEmergency HVAC
True 24/7 response across LA & OC. A live answer at (818) 817-6005 — nights, weekends, and holidays.
Learn moreHeating Repair
Furnaces, heat pumps, and wall heaters — diagnosed and repaired with safety-first gas work, 24/7.
Learn moreFurnace Repair
Ignition, blower, and heat-exchanger repairs with combustion safety checked on every visit.
Learn moreHVAC Maintenance
Real multi-point tune-ups that prevent summer breakdowns, cut energy bills, and protect your warranty.
Learn moreIndoor Air Quality
Filtration, purification, and duct sealing that protect your home's air — especially during smoke season.
Learn moreCommercial HVAC
Rooftop units, restaurants, retail & offices — commercial service scheduled around your business hours.
Learn moreHeat Pumps
One efficient electric system for heating and cooling — ideal for SoCal homes, with honest rebate guidance.
Learn moreDuctwork & Duct Replacement
Testing, sealing, repair & full replacement — because leaky ducts waste the comfort you're paying for.
Learn moreNot sure what you need?
Describe what’s happening and we’ll tell you straight — 24/7, no obligation.
(818) 817-6005Licensed & Accountable
A state-licensed contractor that stands behind the work
United Heating & Air Conditioning holds the CA State Warm-Air HVAC License C-20 #1094200 — the California license classification specifically for warm-air heating, ventilation, and air conditioning. 25 years in business, every job covered by our parts & labor guarantee, and our installations backed by a lifetime guarantee.
- 25 years serving LA & Orange County
- 24/7 emergency availability
- Parts & labor guarantee
- Lifetime guarantee on our installations
Orange County — common questions
Which Orange County cities do you serve?
All of them — Anaheim, Santa Ana, Irvine, Huntington Beach, Newport Beach, and every South County community down to San Clemente and Dana Point. The city pages below cover our most-served areas, but the whole county is our territory.
Can you work within Orange County HOA rules?
Yes — HOA requirements for equipment placement, screening, and noise are a daily part of OC work. We handle the documentation and install within the rules so approvals go smoothly.
Do coastal OC homes need special equipment?
Near the water, yes — salt air corrodes standard condensers years early. For beach-adjacent replacements we recommend coastal-rated equipment with protective coil coatings, and our maintenance visits specifically target corrosion-prone components.
Do you offer 24/7 emergency service throughout Orange County?
Yes — our emergency line (818) 817-6005 answers around the clock for all of Orange County, including weekends and holidays.
Need HVAC help in Orange County?
Call (818) 817-6005 for service anywhere in Orange County — 24/7 for emergencies — or send the form and we'll call you back fast.
Call (818) 817-6005CA C-20 License #1094200 · 25years in business · Parts & labor guarantee
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