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Heating & Air Conditioning Lake Forest CA

Heater, Furnace & AC Services in Lake Forest, CA

Same-Day Home & Commercial HVAC Company in Orange County

At John Stevenson Plumbing, Heating & Air Conditioning, Inc., we are proud providers of first-rate HVAC services in Lake Forest and surrounding areas. Our team has been in the HVAC and plumbing industries for many years, and we know how to take care of our customers - just read our reviews to see what they have to say! We take pride in our professionalism and excellent customer service – plus, we offer the residential and commercial furnace and AC repair services our customers are searching for when they need help. From repairs to installation, maintenance and more, we can handle it all!


Lake Forest Heating & Air Conditioning Services We Offer:

When you choose John Stevenson Plumbing, Heating & Air Conditioning, Inc., you can rest assured that you will receive respect and honesty from our heating and air conditioning service team because how we treat people is important to us. Not only are our HVAC services reliable, but they are also affordable.


When you are ready to give our NATE certified technicians a chance to prove we deserve your business, you can find us in your local area.

Make your first call to John Stevenson Plumbing, Heating & Air Conditioning, Inc. You Reach us at (949) 426-7377 or send us a message online to schedule heating or AC repair in Lake Forest.

Why Choose John Stevenson for Your Lake Forest AC Services?

When your air conditioning system isn’t performing as expected, we understand it can be frustrating. That's why our Lake Forest air conditioning technicians work around the clock to ensure your AC system is repaired and maintained, so it’s always ready to serve you. Regardless of the issue you are facing with your air conditioner, whether it be temperature inconsistencies or noisy operation, John Stevenson Plumbing, Heating & Air Conditioning, Inc. can help. We are equipped to handle a host of AC problems, providing the necessary repairs to restore comfort to your home and functionality to your air conditioner.


  • Low refrigerant
  • Clogged air filters
  • Damaged motors
  • Air leaks from damaged ductwork
  • Frozen evaporator coils
  • Refrigerant leaks
  • Faulty compressors
  • Neglected maintenance
  • Misaligned AC belts or worn bearings
  • Failed capacitors
  • Dirty condenser coils

If your AC ever requires a replacement, our team will be here to handle the installation process with the reliability and attention to detail you expect from true HVAC experts. With so many options available, it can be difficult to know what you want in a new air conditioner. That’s why our AC installation pros in Lake Forest like to keep up to date on changes in the industry and new products that come to the market. We like to offer our customers a wide selection of innovative choices for your system upgrades, just in case you are looking for a specific type of system.

Is your air conditioner malfunctioning? Give our HVAC company a call at (949) 426-7377 or contact us online today!

Why Won’t My Air Conditioner Turn On?

When your air conditioner refuses to turn on, the comfort of your home or business can be significantly impacted. The cause of this problem can range from simple to complex and may include issues with your thermostat, the shutoff switch, a clogged condensate drain, a tripped circuit breaker or blown fuse, amongst a host of other possibles reasons. In order to determine the specific cause behind this issue, it’s best to contact a trained air conditioning repair professional who can inspect the unit, handling whatever repair is needed safely and efficiently.

An AC unit refusing to turn on is a major indicator that service is required, however, there are other potential signs that you should watch for that could also point to repair being needed.


  • Your air conditioner starts blowing out warm air instead of cool air
  • Your property feels more humid than normal 
  • Your system is leaking water
  • Your air conditioner is making unusual screeching, whistling, or banging noises
  • Your system is no longer producing the same level of airflow
  • Your thermostat isn’t communicating with your air conditioning unit
  • Your energy bills have increased more than usual
  • Your air conditioner smells musty or like it’s burning when running
  • Your indoor air quality has decreased

If you have noticed any of the above signs, don’t hesitate to contact the Lake Forest AC repair pros at John Stevenson Plumbing, Heating & Air Conditioning, Inc.. Delaying a necessary repair can cause additional damage to accrue, leading to costlier problems and potentially even early system breakdowns.

Heater Repair & Replacement Experts in Lake Forest

If your heater is broken, you can count on the Lake Forest heating repair team at John Stevenson Plumbing, Heating & Air Conditioning, Inc. We have many years of experience providing quality heating repair services at an affordable price. Each of our HVAC technicians is outfitted with a fully stocked can that contains all they would need to get your system up and running again for you in no time. We offer emergency services, and we respect your time, so you can always expect our technicians to arrive on time and ready to work.

Our furnace repair team is committed to delivering exceptional service to each of our customers. We understand that a malfunctioning heater can be a major inconvenience, especially during the colder months. That's why we make it our priority to get your system back up and running as quickly as possible. Our HVAC technicians are highly skilled and trained to work on all types of heating systems, including furnaces, boilers, heat pumps, and more. They use the latest diagnostic tools and techniques to accurately identify the root cause of the issue and provide effective solutions.

In addition to our repair services, we also offer heater maintenance plans to help keep your heating system running smoothly and prevent future breakdowns. Our furnace repair team will work with you to create a customized plan that meets your specific needs and budget.

At John Stevenson Plumbing, Heating & Air Conditioning, Inc., we believe that quality furnace repairs should never come at a premium. That's why we offer affordable pricing and financing options to make our services accessible to all. We also stand behind our work with a satisfaction guarantee, so you can have peace of mind knowing that your heating system is in good hands.

Local Indoor Air Quality Solutions

At John Stevenson Plumbing, Heating & Air Conditioning, Inc., we provide indoor air quality services throughout Lake Forest to keep your indoor air free of airborne pollutants, including dust, pollen, mold, and even bacteria and viruses. We also provide duct cleaning, sheet metal fabrication services, and preventative maintenance plans to keep your HVAC system clean and problem-free.

Financing & Convenient Service Plans Available—Call Now! 

The team at John Stevenson Plumbing, Heating & Air Conditioning, Inc. understands what it’s like to hear your heating or cooling systems need to be replaced and not knowing where the money will come from; that’s why we offer flexible payment options through GoGreen Financing. Our Lake Forest HVAC team has you covered – from honest and fair pricing to innovative products, we ensure you have everything you need to keep your home comfortable.

Call (949) 426-7377 or contact us online today to schedule an appointment for HVAC services in the Lake Forest, CA area.

What Makes Us a Community Name?

Benefits of Working with Our Expert Team
  • Drug Tested & Background Checked Technicians
  • Upfront Pricing — You’ll Never Pay More Than You’re Quoted
  • Expert Advice From Professional, Licensed and Certified Technicians
  • We Stock Enough Parts in Our Trucks to Do 93% Of Repairs on the Spot
  • Flexible Scheduling - Ask About Same-Day or Emergency Service
  • 5 Star Service Guarantee Includes Service Tailored to Your Needs & Budget

Ready to Get Started?

Call (760) 276-6690 Now!
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Always Close By Providing Service 6 Days a Week. Monday - Sunday, 8:00 AM - 7:00 PM

You can rely on us for fast, effective services. As part of our 5 Star Service Guarantee, we promise to value your time, provide knowledgeable technicians, and dedicate ourselves to your full happiness with all of our services.

  • Encinitas
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Hear From Our Customers

Expertise isn't the only thing we have gained over the past three decades - check out our loyal customer base!
    “Such a great experience!”
    “I can't say enough great things about Patrick and the whole John Stevenson company.”
    - Holly G.
    “Great Experience!”
    “Great job, the technicians explained everything so that I could make the best decision for my home.”
    - Victoria J.
    “Highly Recommend!”
    “I have been using John Stevenson’s services for about 7 years now and am really happy with all the services provided so far: new heater installation and yearly checkup/tune-up; new tankless water heater installation and yearly flush.”
    - Flavia P.
    “Very Knowledgeable!”
    “The thing about John Stevenson Plumbing is that it is simply the best company of its type in the region. The technicians are smart, personable, always courteous and helpful, knowledgeable and fun to get to know. They do their jobs on time and on budget and”
    - John H.
    “Definitely Recommend!”
    “Luis was great! Fixed a leak in a gas line to our Guest House. Work was done quickly and professionally with excellent communication to me about the process.”
    - Pam L.
    “Excellent Work!”
    “I have used John Stevenson numerous times over the past few years for both plumbing and heating issues.”
    - Phyllis S.
    “Very Pleased!”
    “Scheduling was easy. Received a call 30 minutes before technicians arrived. John, the lead man explained the work to be done. He and his apprentice Gilbert were courteous and friendly.”
    - Phil H.
    “Extremely Professional!”
    “We really enjoyed the experience and the professionalism from John Stevenson Plumbing. Thomas came out and did the initial inspection and troubleshooting of our furnace.”
    - Nancy C.