We are thrilled to announce a significant milestone in our journey. Complete Comfort Plumbing, Heating & Air Evolves into John Stevenson Plumbing, Heating & Air Conditioning, Inc. We are excited about the future as we continue to strive for excellence in all our endeavors. Thank you for your trust and continued support! 

AC Installation

Mission Viejo AC Installation

Top-Rated Air Conditioner Installers Near You

Unfortunately, air conditioners don't last forever, and not every AC issue can be cost-effectively repaired. If your air conditioner is showing signs that it's nearing the end of its lifespan, it may be time to consider replacing it. 

Offering services for both residential and commercial customers, our Mission Viejo AC installation experts can help you select the right new system based on the size you need to efficiently cool your space, whether that's a average single-family home or a huge warehouse. With convenient financing options and valuable online specials, we make installing a new air conditioner simple and affordable.

Air Conditioner Energy Efficiency

In the market for a new AC? Air conditioner energy efficiency is a crucial consideration when it comes to both environmental sustainability and cost savings. Energy-efficient air conditioners are designed to use less electricity while maintaining optimal cooling performance. They achieve this through various technological advancements, such as improved insulation, variable speed compressors, and advanced airflow systems, which help ensure the cooling process is more efficient and less energy is wasted.

What Is SEER Rating?

One of the key metrics used to measure air conditioner energy efficiency is the Seasonal Energy Efficiency Ratio (SEER). A higher SEER rating indicates a more energy-efficient unit. This advancement translates into reduced electricity consumption and lower utility bills for consumers. In recent years, there has been a significant improvement in SEER ratings, with many models now exceeding 20 SEER or higher.

If you have questions about AC energy efficiency, John Stevenson Plumbing, Heating & Air Conditioning, Inc. can help. Our Mission Viejo AC installation experts can help you select the right cooling system to meet your energy efficiency goals and your budget.

To get a FREE quote for air conditioning installation or AC system replacement in Mission Viejo, call John Stevenson Plumbing, Heating & Air Conditioning, Inc. now at (949) 426-7377.

Signs It's Time to Replace Your Air Conditioner

There are several signs that indicate it may be time to replace your air conditioner.

  • First, if your AC unit is more than 10-15 years old, it is likely becoming less efficient and may require frequent repairs. 
  • Second, if you notice a significant increase in your energy bills despite regular maintenance, it could be a sign of decreased efficiency. 
  • Third, if your AC struggles to cool your home or if there are inconsistent temperature variations, it may be a sign of a failing unit. 
  • Finally, if your air conditioner is emitting strange noises or producing unusual odors, it could indicate mechanical issues that warrant a replacement. 

When in doubt, consulting our Mission Viejo air conditioning replacement technicians can help you determine if it's time for a new air conditioner.

Financing Available for New Air Conditioner Purchases!

Replacing an air conditioner is a big investment, which is why John Stevenson Plumbing, Heating & Air Conditioning, Inc. is happy to provide our customers with financing options to make these types of large purchases more affordable. Through our partnership with GreenSky, you can choose the option that works for you, whether that's no interest and no payments for 6 months, no interest if paid in full in 12 months, or another option. Our goal is to help you get the new air conditioner you need without breaking the bank.

To schedule a quote for air conditioning replacement or first-time installation in Mission Viejo, contact us today!

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
Frequently Asked Questions
  • Should I replace or repair my AC unit?

    Many customers ask if they should repair a broken air conditioning unit versus a full replacement. Often, a well-maintained and newer AC unit will be able to be repaired depending on the issue. If it is a part under warranty, replacement of the part is a simple fix. However, if the AC is more than 10 years old, has not been regularly serviced, or is in need of a major repair, replacement is the best option. Our team will provide all available options for homeowners to consider.

  • What's a Pre-Installation Evaluation? Does My New A/C Need One?

    In short, yes. A first step is conducting an energy audit to determine the energy load for your home. Calculating the load tells the experts at John Stevenson Plumbing, Heating & Air how much heat your house gains throughout the day & what size air conditioner will work best to keep it cool. This is critical as most A/C installation issues stem from an improperly-sized air conditioning unit.

  • Is Your Home's Ductwork & Design Able to Handle a New A/C System?

    Often your old, existing ducts can’t handle the airflow of a newly installed air conditioner. Any upgrades to accommodate a new system will likely increase the cost to install an A/C unit, but will ultimately help you avoid costly, high energy bills & hot rooms in the future.

  • What Type of Central A/C Unit Should I Install?

    Here’s where the load calculation comes into play, as you want to pick the right size A/C unit to install – either too big or too small of an A/C unit can lead to costly repair or replacement down the road. Call the HVAC professionals at John Stevenson Plumbing, Heating & Air, they’ll know which A/C unit is perfect to install in your home at the lowest price.

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  • Based In Carlsbad, Serving a Wide Area
    2748 Loker Avenue West Carlsbad, CA 92010
    [Map & Directions]
  • Providing Service 6 Days a Week
    • Monday - Saturday

      8:00 AM- 7:00 PM

    • Sundays


  • Call Us 24/7 To Request Your Service

A Homeowner’s Best Friend

Expertise isn’t the only thing we have gained over the past three decades - check our our loyal customer base!
  • “I can't say enough great things about Patrick and the whole John Stevenson company.”

    - Holly G.
  • “Great job, the technicians explained everything so that I could make the best decision for my home.”

    - Victoria J.
  • “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.
  • “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.
  • “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.
  • “I have used John Stevenson numerous times over the past few years for both plumbing and heating issues.”

    - Phyllis S.