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 Repair

Mission Viejo AC Repair

Same-Day Appointments & 24-Hour Emergency Service Available!

A broken air conditioner is a big problem on a hot day. When you need fast, efficient repairs for your air conditioner, you need a reliable local company on call that you can trust. Here in Mission Viejo, that company is John Stevenson Plumbing, Heating & Air Conditioning, Inc.. Since 1999, we've proudly provided top-tier AC repair services to customers throughout Orange County. During that time, we've earned a great reputation for friendly service, knowledgeable technicians, and high-quality repairs.

With Complete Comfort, You Can Expect:

  • On time arrival
  • Honest recommendations
  • Competitive pricing
  • Personalized solutions

Signs Your AC Needs Repairs

Recognizing the signs of a malfunctioning air conditioner is crucial to ensure timely repairs and prevent further damage. Here are some common indicators that your air conditioner may be experiencing issues:

  • Insufficient Cooling: If your air conditioner is struggling to cool your space or if there are noticeable temperature variations throughout your home, it could indicate a malfunction. This could be due to a faulty compressor, refrigerant leaks, or blocked air vents.
  • Strange Noises: Unusual sounds coming from your air conditioner, such as grinding, squealing, or banging noises, are signs of potential problems. These noises may indicate loose or worn-out components, a malfunctioning fan, or a damaged motor.
  • Frequent Cycling: If your air conditioner frequently turns on and off without reaching the desired temperature, it could be a sign of an underlying issue. This could be caused by a malfunctioning thermostat, a refrigerant leak, or an improperly sized unit.
  • Weak Airflow: Reduced or weak airflow from your air conditioner's vents may suggest a problem with the fan motor, clogged air filters, or blocked ductwork. Poor airflow can lead to inadequate cooling and inefficient operation.
  • Unpleasant Odors: Foul or musty smells emanating from the air conditioner can indicate mold or mildew growth in the unit or ductwork. It is essential to address this issue promptly to prevent the circulation of contaminated air.
  • Increased Energy Bills: A sudden spike in energy bills without any significant changes in usage patterns could indicate an inefficient or malfunctioning air conditioner. Aging components, faulty AC capacitors, refrigerant leaks, or poor insulation can contribute to increased energy consumption.

For the best AC repair in Mission Viejo, make your first call to John Stevenson Plumbing, Heating & Air Conditioning, Inc.. Dial (949) 426-7377 now!

Why Isn't My AC Cooling My House?

If your AC runs all the time but does not seem to be cooling your home, you may have any of the following issues:

  • Incorrect Thermostat Settings: Ensure that your thermostat is set to the desired temperature and is in the cooling mode. Sometimes, the thermostat may be set incorrectly, causing the air conditioner not to kick in. On the other hand, a thermostat that is set too low in relation to how hot it is outside can cause it to constantly run without actually being able to reach your desired temperature.
  • Dirty Air Filters: Dirty or clogged air filters restrict airflow, reducing the cooling efficiency of your air conditioner. Check and clean or replace the air filters regularly to ensure proper airflow.
  • Refrigerant Issues: Low refrigerant levels or refrigerant leaks can lead to insufficient cooling. If you suspect a refrigerant issue, it is best to contact our Mission Viejo AC repair technicians to diagnose and repair the problem.
  • Blocked Condenser Unit: The outdoor condenser unit should have adequate space around it to allow proper airflow. Ensure that there are no obstructions such as plants, debris, or other objects blocking the unit.
  • Faulty Compressor or Fan: A malfunctioning compressor or fan can prevent the air conditioner from cooling effectively. If you hear unusual noises coming from the outdoor unit or notice that the fan is not running, it may indicate a problem with these components.
  • Ductwork Issues: Leaky or poorly insulated ductwork can lead to cooled air escaping before it reaches the desired areas, resulting in inadequate cooling. Inspect your ductwork for leaks or damage and seal or repair as necessary.
  • Aging Equipment: If your air conditioner is old and worn out, it may struggle to cool your house efficiently. Over time, the performance of the unit can deteriorate, and it may be necessary to replace it with a more energy-efficient model.

NATE Certified AC Repair Technicians

At Complete Comfort, our technicians are factory trained and certified by NATE (North American Technician Excellence®) for your peace of mind. What does this mean for you? It means that our technicians are true air conditioning experts who are experienced in all aspects of AC service and repair. 

Each technician participates in ongoing training to keep abreast of the latest methods and techniques. So no matter what brand, make, or model of cooling equipment you have, you can trust that our team has the right expertise to solve your problem. This commitment to excellence is essential to our mission to be the best AC repair company in Mission Viejo. 

Call Today to Schedule Your AC Repair Appointment!

When you need air conditioning repair in Mission Viejo, you need Complete Comfort. As a second-generation family owned company, we're committed to carrying on a legacy of unmatched service that prioritizes value for our customers.

We look forward to serving you and exceeding your expectations. 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.