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

Award-Winning Furnace Repair Company Serving Orange County Since 1996

Locally Owned HVAC Company Since 1996

Locally and Family Owned HVAC Company

Carrier President’s Award

11-Time Winner of the Carrier President's Award

We Employee NATE Certified Technicians

Highly Trained NATE-Certified Technicians

Air Conditioning Preventative Maintenance Experts

Comprehensive Inspections & Safety Checks

Service All HVAC Makes & Models

We Service All HVAC Makes & Models

Dedicated to Complete Customer Satisfaction

Thousands of Satisfied Clients

Orange County's Heating & Furnace Repair Experts

Since 1996, McMaster Heating & Air Conditioning has provided reliable, cost-effective heating system repair services to Orange County homeowners. Over the years, we've earned the trust of thousands of clients throughout Irvine, Newport Beach, Mission Viejo, Rancho Margarita, and surrounding areas, who attest to our expert workmanship, superior customer service, and honest advice in numerous online reviews. We will never try to sell you a product you don't need and always go out of our way to find the best heating system repair services for your indoor comfort and budget. Whether that means replacing a condenser, repairing your thermostat, or upgrading to a more energy-efficient furnace, we will deliver a dependable, high-quality solution at a great price.

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Customer Reviews


Extremely professional organization. From the first service call to verify that my existing system was not worth the sales manager (Christian) who walked me through the options and answered my late night email questions...all the way thru the crew who meticulously removed my old equipment and had the new system up and running in less than 2 days (complete new A/C, furnace and ducts), everyone . . .

Steven Scapellati 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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There when I need them, works to accomodate my needs, my way. Reasonably priced and fair charges. I would recommend this company to anyone that is tired of being taken advantage of.

Donald T., Irvine, CA Via McMaster Heating & Air Conditioning Customer Lobby Reviews

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Comprehensive Heating System Repairs for
All Major HVAC Makes and Models

When you call McMaster Heating & Air Conditioning, you'll receive access to a dedicated team of HVAC professionals with extensive industry knowledge and decades of experience in all major makes and models of heating systems, Carrier, Bryant, Rheem, York, American Standard, Fujitsu, Trane, Mitsubishi Electric, Daikin, Goodman, Lennox, and more. As a Carrier Factory Authorized Dealer, we also offer factory-direct pricing on their full product lines of energy-efficient replacement furnaces, heat pumps, ductless mini-split systems, thermostats, and indoor air quality products.

Highly Trained & Reliable HVAC Repair Technicians

Our team of highly experienced service technicians are specialists in the latest heating and cooling technology and are certified by NATE (North American Technician Excellence.) Experts in correctly identifying and diagnosing the source of any heating system malfunction, they use the industry's best practices and advanced diagnostic tools on every heater or furnace repair. With decades of hands-on expertise, they can be trusted to provide reliable advice on choosing the best repair solution to get your system working quickly, safely, and efficiently. Whatever your service repair needs, you can rest assured that your service technician will arrive at your scheduled service appointment promptly, in uniform, driving a fully stocked service vehicle with all the necessary equipment to get the job done.

Call to Schedule An Appointment Today. We Offer Fast Response Times On Heater Repair Services for Irvine, Newport Beach, Mission Viejo & Nearby Areas

Contact us today to schedule a convenient heater repair service appointment. Our phones are answered Monday through Friday, from 8:00 am to 5:00 pm, and Saturday 9:00 am to 2:00 pm. We do our best to accommodate after-hours emergency heater/furnace repair requests throughout 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
After-Hours Emergency Heater/Furnace Repair Irvine, OC

Recent Projects

Our heating system repair services include a thorough inspection of all components and ductwork to accurately diagnose the source of the problem. We also offer after-hours emergency heater/furnace repair requests throughout Orange County.

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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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