Alpha & Omega HVAC Appliance Repair · Orange County, CA

Commercial HVAC & Rooftop AC Repair in Orange County

✅ Licensed & Insured — BHGS #48760
⭐ 197 Yelp Reviews · 5.0★ Google
🛡️ 90-Day Parts & Labor Warranty
📅 Family-Owned Since 2005
💵 $75 Commercial Service Call

When the AC quits in a restaurant, a dental office, or a retail floor, you're not just uncomfortable — you're losing covers, appointments, and staff. Commercial systems also fail differently from home units: most Orange County businesses run rooftop package units (RTUs) that sit in the sun, collect grease from kitchen exhaust, and get almost no attention until they stop. We service commercial HVAC and rooftop AC across Orange County, and we treat these as priority calls.

Commercial Equipment We Service

Rooftop package units (RTUs) — gas/electric and heat pump, single and multi-zone
Split systems serving offices, suites, and back-of-house areas
Ductless mini-splits and VRF indoor units — common in newer Irvine office and retail build-outs
Make-up air units and kitchen ventilation-side cooling
Server room / IT closet cooling — dedicated split systems that can't be allowed to fail
Walk-in cooler and freezer refrigeration — see our commercial refrigeration pages

Common Commercial AC Failures We Fix

RTU not cooling on the hottest afternoon — typically a failed capacitor or contactor, a seized condenser fan motor, or a coil so loaded with grease and dust that the unit can't reject heat.
Grease-fouled condenser coils — the number one preventable failure in restaurants. Kitchen exhaust deposits a film on the rooftop coil, head pressure climbs, and the compressor eventually gives up.
One zone hot, another freezing — failed zone dampers, a stuck economizer, or a control board that lost its programming.
Economizer stuck open — pulls hot outside air in all afternoon and doubles the run time; very common and very often missed.
Compressor short-cycling or tripping on high head pressure — dirty coil, low airflow, or refrigerant charge issues.
Condensate overflow onto the ceiling — a plugged drain pan or trap; catches you as a ceiling-tile stain before you notice the AC problem.
Belt-driven blower failures — worn belts and bearings on older RTUs, usually announced by a squeal you hear from the dining room.

💡 Owner's tip: the cheapest thing you can do for a restaurant rooftop unit is have the condenser coil cleaned before summer and again after. In an Orange County kitchen, a greased-over coil will cost you a compressor — a repair many times the price of the cleaning that would have prevented it.

How We Work With Businesses

Priority scheduling — a business with no cooling and customers in the door goes ahead of routine work.
Before or after hours where the work would disrupt service — tell us your rush and we'll plan around it.
Written diagnosis and price before we start, so you can approve it or take it to the property manager.
Invoices suitable for landlords and property managers — many Orange County leases put rooftop HVAC on the tenant, and you'll need the paperwork.
Repairs carry a 90-day parts & labor warranty, up to 5 years on select parts, confirmed on-site.
Technicians are EPA Section 608 Universal certified for refrigerant work; company is licensed and insured, BHGS #48760.

Businesses We Serve

Restaurants and cafés, bars and breweries, markets and delis, dental and medical offices, salons, gyms, offices and coworking suites, retail floors, churches, and schools — across Irvine, Anaheim, Santa Ana, Costa Mesa, Newport Beach, Huntington Beach, Orange, Tustin, Lake Forest, and Mission Viejo.

Brands We Service

Not factory-authorized on any commercial HVAC brand — we're independent technicians who work on what's actually on your roof: Carrier, Trane, Lennox, York, AAON, Daikin, Rheem, Goodman, Bard, Mitsubishi, and most other commercial brands.

Service Area

Commercial HVAC and rooftop AC repair throughout Orange County. Also see our commercial refrigeration repair, commercial ice machine repair, and residential AC repair pages.

Frequently Asked Questions

How fast can you get to a business with no air conditioning?

Same-day service is usually available, and commercial no-cool calls get priority — a restaurant or medical office losing cooling loses money every hour. Call (310) 600-8152 and say it's a commercial unit so we schedule it accordingly.

Do you service rooftop units (RTUs)?

Yes — rooftop package units are the majority of what we see on Orange County restaurants and retail. We service gas/electric and heat pump RTUs: capacitors, contactors, condenser and blower motors, belts, economizers, control boards, coil cleaning, and refrigerant-side diagnostics.

Can you work after hours so we don't lose business?

In most cases yes. Tell us your service hours when you call and we'll plan the visit around your rush where the repair allows it.

Our lease says rooftop HVAC is the tenant's responsibility — can you invoice for that?

Yes. We provide a written diagnosis and an itemized invoice you can submit to a landlord or property manager, which is usually what they need to release funds or approve the work.

Why does our restaurant rooftop unit keep failing?

Almost always grease. Kitchen exhaust settles on the rooftop condenser coil, the unit can't shed heat, head pressure climbs, and the compressor works itself to death. Cleaning the coil twice a year is the single cheapest way to stop that cycle.