AC Repair in Irvine, CA

• ✅ Insured · EPA 608 Universal Certified Technicians
• ⭐ 200 Yelp Reviews · 5.0★ Google
• 🛡️ 90-Day Parts & Labor Warranty
• 📅 Family-Owned Since 2005
• 📍 Based in Irvine

Irvine summers are mild most days — until a heat wave or a Santa Ana wind pushes inland temperatures up, and a system that has coasted all year suddenly has to run for hours. That is when weak capacitors, clogged drains and dirty coils show up. Alpha & Omega is a family-owned company that has worked in Orange County since 2005 and is based in Irvine, so AC calls from Woodbridge, Northwood, University Park, Turtle Rock, Westpark, Quail Hill, Portola Springs, Orchard Hills and the Great Park neighborhoods are local runs for us. Call (310) 600-8152 or text us what the system is doing, where the indoor unit is (attic, garage, closet) and whether it is a central system, a heat pump or a mini-split.

Where the AC Sits in Irvine Homes — and Why It Matters

The same symptom can have a different cause depending on how the home was built. More about the villages is on our Irvine service area page.

Two-story homes with an attic air handler

In many two-story Irvine homes — especially the newer villages — the furnace or air handler and the indoor cooling coil sit in the attic. That layout has a few consequences:

• Condensate has to drain a long way. The coil pulls water out of the air all day. It runs through a primary drain line, and under the unit there is usually a secondary pan. Algae and dust can clog the primary line; when water backs up into the pan, a float switch shuts the system off to protect the ceiling. The result looks like a dead AC: the thermostat calls for cooling and nothing happens, or the outdoor unit stops while the fan keeps running.
• A drip from a ceiling vent or a stain on the upstairs ceiling means water is getting past that protection. Turn the system off at the thermostat and call — see why an AC leaks water for what is going on.
• The attic is hot. On a summer afternoon the attic can be far hotter than the house, which is hard on the blower motor, its capacitor and the ducts. Early-morning appointments are easier on everyone, including the equipment.
• Upstairs rooms run warm. A crushed or disconnected attic duct, a closed damper or a clogged filter can leave the second floor warm while downstairs is fine. We check airflow before anything else, because it is often the whole story.

Condos, townhomes and apartments — Irvine Spectrum, Park Place and the villages

Irvine has a large share of attached housing: townhome rows in Woodbridge and Northwood, condo buildings around Irvine Spectrum, and high-density apartment communities such as Park Place near the Irvine Business Complex. The equipment there is different from a single-family house:

• Indoor units in closets. Many condos have a vertical air handler or furnace with a coil in a hall or utility closet. A clogged filter or a blocked return grille in a small space quickly leads to a frozen coil — see why an AC freezes up.
• Outdoor units far from the unit they serve. Condensers may sit on a shared pad, a side yard or a roof, lined up next to the neighbors'. Knowing which one is yours saves real time; if the unit is labeled, send us a photo.
• Mini-splits and heat pumps. Ductless wall units are common in additions, converted garages and some newer buildings, and many recently built homes use heat pumps for both heating and cooling.
• HOA rules. Access to roofs and common areas, work hours and parking are often set by the HOA. We plan the visit around those rules and leave an itemized invoice that the owner or HOA can file.

If you rent — including in Irvine Company communities — call the leasing office first. Most leases route AC repairs through property management, and a repair you arrange yourself may not be reimbursed. We work for homeowners, condo and townhome owners, landlords and property managers, and we coordinate access with the tenant when the owner books us.

Older homes in the first villages

In University Park, Turtle Rock, Culverdale and College Park, cooling is often a furnace in a hall closet or the garage with a coil on top and an outdoor unit in the side yard, and most systems have been replaced at least once. Typical calls are dirty coils, worn capacitors and contactors, and condensate lines that back up onto the floor.

AC Symptoms and What They Usually Mean

• Runs but blows warm air — a failed capacitor or contactor that lets the indoor fan run while the outdoor unit sits still, a dirty condenser coil, a frozen indoor coil, or a refrigerant leak. Our guide on an AC blowing warm air goes through them.
• Cools a little, never reaches the setting — airflow first (filter, return grille, ducts), then coil condition and system capacity. See AC not cooling.
• Won't turn on at all — thermostat, breaker, outdoor disconnect, or a float switch tripped by a clogged drain. The AC not turning on guide covers the free checks.
• Outdoor unit hums but the fan doesn't spin — very often a failed run capacitor or a seized condenser fan motor. Turn the system off; leaving it humming can overheat the compressor.
• Ice on the refrigerant lines or indoor coil — restricted airflow or low refrigerant. Switch cooling off and let it thaw with the fan on before anyone looks at it.
• Short cycling — starts and stops every few minutes. Causes range from a badly placed or failing thermostat to an overheating compressor, a dust-packed outdoor coil, or a float switch on a clogged attic drain. Our AC short cycling guide explains how long a normal cycle should be and how to tell the causes apart.
• Water near the indoor unit or on a ceiling — clogged condensate line, cracked or rusted pan, or a disconnected drain fitting.
• New noises — rattling panels, a squealing blower motor, a clicking relay. Caught early, these are usually small repairs.
• Error code on a thermostat, mini-split or heat pump — take a photo. Codes differ by brand and help us bring the right parts.

Not sure whether a symptom is urgent? Our list of HVAC warning signs explains which ones can wait a day and which ones mean "turn it off now."

What You Can Safely Check Before You Call

• Thermostat. Mode set to Cool, setpoint below room temperature, fan on Auto, fresh batteries if it uses them. Smart thermostats can be in an eco, away or schedule mode that overrides what you set.
• Air filter. A clogged filter is the most common cause of weak airflow and frozen coils. Filters are often behind a return grille in a hallway ceiling or wall, or at the air handler itself.
• Breakers. The indoor unit and the outdoor unit usually have separate breakers. If one has tripped, reset it once. If it trips again, leave it off and call.
• Outdoor disconnect. Many condensers have a service switch mounted next to them. Make sure it is on.
• Around the condenser. Clear leaves, stored items and overgrown plants from around the outdoor unit so it can move air.
• Supply and return vents. Open them, and move furniture or rugs that block them.

What Not to Do

• Do not open the outdoor unit or touch a capacitor. Capacitors store a charge even with the power off.
• Do not buy a refrigerant "recharge kit." A system that is low on refrigerant has a leak. Handling refrigerant is EPA-regulated, and adding it without finding the leak is not a repair.
• Do not keep running a system with ice on it — it can send liquid back to the compressor.
• Do not climb into a hot attic to clear a drain line or empty a pan. Attic joists, heat and wiring make it a real injury risk; a technician does it with the power off.
• Do not keep resetting a breaker that trips again. A repeat trip means a fault that needs a diagnosis.

Refrigerant: Leaks Get Found, Not Topped Off

Our technicians are EPA Section 608 Universal certified. An air conditioner is a sealed system — it does not use up refrigerant. If the charge is low, something is leaking, and the honest first step is to find where. Many existing systems in Irvine use R-410A, and newer equipment is moving to lower-GWP refrigerants such as R-454B and R-32, so the technician confirms which one your system uses before any refrigerant work. If the leak turns out to be in a major component and the fix would go beyond minor repair, we say so and explain your options.

What to Expect When You Call

1. Call or text (310) 600-8152. Tell us what the system is doing, where the indoor unit is, and your Irvine neighborhood. A photo of the outdoor unit's label helps.
2. A technician diagnoses on site and quotes the repair before any work starts. Nothing is replaced until you approve it.
3. Common parts are on the truck. Many repairs — capacitors, contactors, drain clearing, float switches — are finished on the first visit. If a part has to be ordered, we tell you when it is expected and schedule the return trip then.
4. Every repair carries a 90-day parts and labor warranty. If the system is near the end of its life, our repair or replace guide shows how we think about it. We do not install or replace systems; for a new system, see our partner for HVAC installation.

Our before the technician arrives checklist makes the visit faster — clear a path to the attic hatch or closet, and to the outdoor unit.

Keep It From Happening Again

Most of the calls above were preventable: a drain line that was never flushed, a filter left for a year, a condenser packed with leaves. An AC maintenance & tune-up — coils, capacitor and electrical checks, condensate drain and float switch, airflow — is best done in spring, before the first heat wave. Change the filter on the schedule the manufacturer recommends, and more often if you have pets or ongoing construction nearby, which is common around the newest Irvine villages.

Frequently Asked Questions

Can you repair my AC in Irvine today?

Often, yes. We work out of Irvine, so Irvine addresses are early stops on our route. On hot days the schedule fills fast, so call (310) 600-8152 as early as you can. Same-day is not guaranteed; if today is full we will tell you and give you the first real slot.

My upstairs AC stopped and the thermostat shows nothing. Is the unit dead?

Not necessarily. In many two-story Irvine homes the air handler is in the attic, with a secondary drain pan and a float switch that cuts power to the system when condensate water backs up. A clogged condensate line that trips that switch can look exactly like a dead system. Check the breaker and the filter, then call — do not try to clear the attic drain from a ladder yourself.

My AC runs but blows warm air. What's wrong?

The usual causes are a failed capacitor or contactor on the outdoor unit, a dirty condenser coil, a frozen indoor coil from poor airflow, or a refrigerant leak. A system that is low on refrigerant has a leak — adding refrigerant without finding the leak is not a repair. Our technicians are EPA Section 608 Universal certified.

I live in an apartment near Irvine Spectrum or Park Place. Can I book you directly?

Call your leasing or property management office first. In most Irvine apartment communities the lease routes AC repairs through management, and a repair you book yourself may not be reimbursed. Condo and townhome owners can book us directly; we follow HOA rules on access and work hours.

Do you install or replace air conditioners in Irvine?

No. Our AC work is limited to minor service and repairs under $1,000. If a system needs replacement, the technician will tell you so plainly, and installation is referred to our partner for HVAC installation.

How is an AC repair in Irvine priced?

The technician diagnoses the system and quotes the repair on site before any work starts. Nothing is replaced without your approval, and every repair carries a 90-day parts and labor warranty.

Beyond Irvine

We also repair air conditioners in Tustin, Lake Forest, Mission Viejo and the rest of South Orange County — see the county-wide AC & air conditioning repair page and HVAC repair & maintenance. In Irvine we also handle refrigerator repair and oven and range repair. Restaurant, office or retail space with a rooftop unit? See commercial HVAC & rooftop AC repair.