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! 

Wifi Thermostats & Home Automation

WiFi Thermostats & Home Automation in Orange County

Offering Cutting Edge Industry Equipment & Installation

Heating and cooling account for approximately 50% of your energy costs. A smart thermostat is a convenient means of trimming the budget and enjoying greater control over the home’s temperature and climate. When you call on the professionals from John Stevenson Plumbing, Heating & Air Conditioning, Inc., we make sure you take advantage of industry-leading innovations and features for maximum savings and satisfaction.

Contact us at (949) 426-7377 for recommendations tailored to your specific expectations, seamless installation, and prompt service throughout the Orange County area.

Professional WiFi Thermostat Installations

Some of the many perks of upgrading to a WiFi Thermostat include:

  • No Human Error – The thermostat learns your schedule and preferences, and keeps track of occupancy, for automatic adjustment.
  • Access – Check the companion app at any time to confirm the proper operation of the heating/cooling system.
  • Easy Adjustment – Stuck at work? Arriving home early? Tucked in bed for the night? Raise or lower temperature through your smartphone from wherever you happen to be.
  • Helpful Alerts – Get notifications in the event of air filter requirements, maintenance needs, power outages, or sudden fluctuations of indoor temperature.
  • Energy Savings – Along with superior management of the HVAC system, utilize energy tracking and conservation tips.
  • Easy Operation – Modern screen designs and companion apps ensure user-friendly programming and operation.
  • Vacation Mode – Avoid energy waste while you’re away without impacting your existing settings.

Smart Home 

As more appliances and technologies allow WiFi connectivity, home automation puts complete control at your fingertips. Whether from your smartphone or a centralized unit inside the home, it’s now possible to manage:

  • Temperatures
  • Lighting
  • Sound systems
  • Door locks
  • Security cameras
  • And much more

John Stevenson Plumbing, Heating & Air Conditioning, Inc. customizes our recommendations to suit your lifestyle and deliver maximum convenience and rewards. Handling design, installation, and setup, we familiarize you with the operation and simplify your everyday life.

Contact us today at (949) 426-7377 for service in Lake Forest, Mission Viejo, or anywhere in Orange County.

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.