Mon-Fri: 8 AM - 5 PM | Sat: 9 AM - 2 PM Tech On-Call 24/7 for Emergencies

Award-Winning AC Repair Company Serving Orange County Since 1996

Carrier President’s Award

Award-Winning AC Repair Company

Over Four Decades of HVAC Experience

Over Four Decades of Experience

Service All HVAC Makes & Models

We Service All HVAC Makes & Models

We Employee NATE Certified Technicians

Highly Trained NATE-Certified Technicians

Air Conditioning Preventative Maintenance Experts

Expert Troubleshooting & Honest Advice

Dedicated to Complete Customer Satisfaction

1,000s of Satisfied Clients

Irvine's Trusted Air Conditioning Repair Company

At McMaster Heating & Air Conditioning, we are dedicated to providing reliable, cost-effective air conditioning repair services in Irvine, Newport Beach, Mission Viejo, Laguna Niguel, and throughout Orange County, CA. Since 1996, we have earned an excellent reputation for our exceptional workmanship, attention to detail, personalized customer service, and very affordable prices. Our clients have honored us with numerous positive online reviews and frequently recommend us to their friends and family because they know that we can be relied upon to get the job done right, on time, and within budget.

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Customer Reviews


Justin was the service person on our six month service program. During his review of our A/C he found several deficiencies that could lead to a serious and costly equipment breakdown. He was able to explain the relationship of the defective parts (capacitors ) to the wellbeing of the system and the cost of repair vs breakdown. He had an unusual ability for communication and very clearly explained the complex circumstances to a novice to electrical matters I was impressed. . .

Jim Martin Via Google Review

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I had an excellent experience to rebuild a new heating and airconditioning system in my house. Contract, installation, repair service and management of McMaster had been done in professional way without any trouble. I really appreciate their job!

Tae Won Oh Via Google Review

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Honest and Reliable Air Conditioner Repairs and Replacements for All Major HVAC Makes and Models

With over 40 years of experience in HVAC system services, we are supremely qualified to provide expert troubleshooting and repairs for all major makes and models of heating and air conditioning equipment, including the following:

  • Carrier
  • Bryant
  • Rheem
  • York
  • American Standard
  • Fujitsu
  • Trane
  • Mitsubishi Electric
  • Daikin
  • Goodman
  • Lennox
  • And More

Unlike other heating and air conditioning companies, we will never try to sell you a product you don't need. Our team of highly trained HVAC technicians always goes the extra mile to find the ideal cooling solution for your indoor comfort needs and budget, whether that means replacing a blown fuse, reprogramming your thermostat, or replacing your AC unit with a more energy-efficient model.

Experienced, NATE-Certified Service Technicians

Our service technicians received specialized, ongoing training that keeps them updated in the latest heating and cooling technology and equipment, including A/C units, heat pumps, ductless mini-split systems, rooftop units, thermostats, ventilation systems, air purification systems, and ductwork. Most of our team members have between 10 and 40 years of experience and are certified by North American Technician Excellence (NATE). By using advanced diagnostic tools and equipment, they can accurately determine the source of your system's malfunction, then provide reliable repair services to get your equipment back on line and working in top condition as quickly and efficiently as possible.

If you decide to upgrade to a new, more energy-efficient cooling system, you can trust that as an award-winning Carrier Factory Authorized Dealer, we can assist you in purchasing and installing a new high-performance A/C unit that best suits your needs.

Book A/C Repair Services in Irvine, Newport Beach, Mission Viejo, Laguna Hills & Surrounding Cities

Call today to schedule a convenient repair appointment or AC tune-up service. Our phones are answered Monday through Friday, 8:00 am to 5:00 pm, and Saturday 9:00 am to 2 pm. We do our best to accommodate after-hours emergency A/C repair requests within Orange County, including Irvine, Newport Beach, Laguna Hills, Mission Viejo, Rancho Santa Margarita, and surrounding areas.

Factory Authorized Carrier Dealer - McMaster Heating and Air Conditioning Carrier Certified Health Air Expert NATE Certified HVAC Technicians NCI National Comfort Institute, Inc. Ozone-Friendly Puron Refrigerant TECH Clean California Energy Solutions
Home Air Conditioning System Repair Services Irvine, CA

Recent Projects

We completed expert troubleshooting and repair services for a home air conditioning system in Orange County. Our NATE-certified technicians are fully qualified to service and repair all major makes and models of air conditioners, heat pumps, and mini-split systems.

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Proudly Serving All of Orange County

  • Aliso Viejo
  • Anaheim
  • Brea
  • Buena Park
  • Costa Mesa
  • Coto De Caza
  • Cypress
  • Dana Point
  • Dove Canyon
  • Foothill Ranch
  • Fountain Valley
  • San Juan Capistrano
  • Santa Ana
  • Seal Beach
  • Southern California
  • South Orange County
  • Stanton
  • Tustin
  • Villa Park
  • Westminster
  • Yorba Linda
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