CA C-20 License #1094200 · Serving LA & Orange County Since 2001
Serious HVAC for Los Angeles & Orange County
AC repair, installation, heating, and 24/7 emergency service from a licensed C-20 contractor with 25 years in the field. When comfort fails, we answer — day or night.
Our team, our trucks — serving LA & OC since 2001
- 25 Years in Business
- 24/7 Emergency Service
- CA C-20 License #1094200
- Parts & Labor Guarantee
- Lifetime Guarantee
- Discounts Available
What we do
Complete heating & cooling services
One licensed contractor for everything your system needs — from tonight’s emergency repair to a full system replacement designed around your home.
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) 817-6005Why United
Built like the HVAC company you wish you’d called first
After 25 years across Los Angeles and Orange County, we’ve earned our reputation one repair at a time: honest diagnosis, guaranteed work, and a phone that gets answered at 2 AM. No pressure tactics, no mystery pricing conversations — just professional HVAC done right.
25 years in business
A quarter century of LA & OC homes kept comfortable — experience that shows in every diagnosis.
True 24/7 emergency service
Nights, weekends, holidays. When you call, our team answers — not a morning callback queue.
Guaranteed work
Parts & labor guarantee on repairs. Lifetime guarantee backing our installations.
Licensed C-20 contractor
CA State Warm-Air HVAC License C-20 #1094200 — the state's specialty HVAC classification.
Cooling and heating, one accountable team.
- Parts & labor guarantee
- Lifetime install guarantee
- Discounts available
- All of LA & OC
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.
Where we work
Serving Los Angeles County & Orange County
From our Hollywood headquarters, our technicians cover both counties — the Valley, the Westside, the South Bay, Long Beach, and all of Orange County down to San Clemente.
Los Angeles CountyCounty hub
Don’t see your city? View all service areas — or call us at (818) 817-6005. If you’re in LA or OC, we cover you.
Parts & Labor Guarantee
Every repair we perform is covered. If something we fixed fails, we come back and make it right — that's the standard we've kept for 25 years.
Lifetime Guarantee
Our installations are backed by a lifetime guarantee on workmanship. We build systems to outlast the paperwork.
Discounts Available
Ask about current discounts when you call — we'll tell you exactly what applies to your repair, tune-up, or new system.
Trusted across two counties
25 years in business, a verified Google Business Profile, and an active Local Services presence. We’d rather show you real customer feedback than print quotes on a website — read our reviews directly on Google.
Read our Google reviewsFrequently Asked Questions
Which areas does United Heating & Air Conditioning serve?
We serve all of Los Angeles County and Orange County — from the San Fernando Valley and the Westside to Long Beach, and from Anaheim and Irvine to South County beach cities. Our office is in Hollywood, Los Angeles.
Are you available for emergencies at night and on weekends?
Yes — we run true 24/7 emergency HVAC service, 365 days a year. Call (818) 817-6005 at any hour and you reach our team.
Are you licensed and insured?
We hold CA State Warm-Air HVAC License C-20 #1094200 — California's specialty license for heating, ventilation, and air conditioning — and have been in business for 25 years.
Do you guarantee your work?
Yes. Repairs are covered by our parts & labor guarantee, and our installations are backed by a lifetime guarantee on workmanship.
What services do you provide?
AC repair, AC installation and replacement, heating repair, furnace repair, HVAC maintenance and tune-ups, indoor air quality solutions, and 24/7 emergency HVAC service — for homes and light commercial buildings.
Ready when your comfort isn't
Call (818) 817-6005 — 24/7, including emergencies — or send the form and we'll get back to you fast. Serving every city in LA County and Orange County.
Call (818) 817-6005CA C-20 License #1094200 · 25years in business · Parts & labor guarantee
Request service online
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