- Services
- AC Installation & Replacement
- AC Repair & Maintenance
- Air Conditioner (AC) Tune Up
- Air Filter Maintenance
- Whole-Home Air Purification & Indoor Air Quality
- Furnace Installation & Replacement
- Furnace Repair
- HVAC Cleaning & Inspection
- HVAC Installation
- HVAC Repair & Maintenance
- HVAC Replacement
- Thermostat Repair
- Service Areas
- Maintenance Program
- Contact Us
- Book Now
Mission Viejo Service Area
Mission Viejo's Local HVAC Experts
AC & furnace repair, service, and installation, same-day service in every Mission Viejo neighborhood. Licensed CSLB #1038022, a 10-year install warranty, and a 24/7 emergency line answered by real people.
Book a Free Estimate Call (949) 590-3296Local & Reliable
Your Neighbors’ HVAC Company. Not a Call Center
One Season Heating & Air Conditioning has serviced thousands of Mission Viejo homes. Our techs live and work in South Orange County, no subcontractors, no call centers, and a real person answering the phone 24/7.
5,500+
HVAC Jobs Completed in South OC
5 Stars
From 300+ Verified Google & Yelp Reviews
15 Min
Avg. Response to Mission Viejo Homes
Local Knowledge Matters
What We See in Mission Viejo Homes
Mission Viejo was built as one of the largest master-planned communities in the country, which means whole neighborhoods share the same builder equipment, and the same failure patterns. County assessor records list more than 12,600 Mission Viejo homes from the 1970s buildout alone.
1960s Tracts
Oso Creek Corridor
Original 50+ year ductwork, undersized returns, and aging R-22 systems overdue for replacement.
Master-Planned
The Big Buildout
Identical builder equipment across 24,000+ homes means R-22 condenser failures hit whole streets in waves.
Lake Communities
Lake Mission Viejo
Builder-grade 13-SEER systems now 20+ years old, oversized, inefficient, and expensive to run.
Modern Heat Pumps
Rancho Mission Viejo
PEX-era homes with heat-pump-ready wiring and builder-warranty work we handle correctly.
Preventing Unexpected Breakdowns
Knowing when your block was built tells us what’s coming, so we fix it before you’re without AC in a 95° week.
What We Do
HVAC Services in Mission Viejo
From emergency repairs to high-efficiency system replacements, we deliver real solutions backed by real warranties.
AC Repair
Fast diagnosis and same-day fixes when your system stops cooling. We carry parts for all major brands.
SCHEDULE REPAIR
AC Installation
Right-sized, high-efficiency replacements backed by a 10-year warranty. We optimize air flow, not just equipment.
GET A FREE QUOTE
Furnace & Heating
Repairs and installs that keep up with cold nights. Ensure your heating is safe and efficient.
SCHEDULE HEATING SERVICE
Maintenance Plans
Twice-yearly tune-ups that head off mid-summer breakdowns. Season Pass Membership includes repair discounts.
VIEW MEMBERSHIP DETAILS
24/7 Emergency Service
A real technician dispatched any hour, any day of the year. When the heat hits, we answer.
CALL EMERGENCY LINENeed Quick HVAC Help?
Book your appointment online instantly or call us directly to get an expert scheduled.
Call (949) 590-3296Every Mission Viejo Neighborhood
From 92691 to 92694, and every 55+ community in between, most Mission Viejo homes see a technician the same day they call.
Oso Creek
Lake Mission Viejo
Casta del Sol
Palmia
Deane Homes
Rancho Mission Viejo
Aegean Hills
Madrid del Lago
What We Stand For
Our Core Values
Honest Communication
No jargon, no hidden agenda, clear explanations and straight answers.
Zero Upselling
Our technicians are never paid to upsell. You get what your home needs.
Punctuality & Respect
On-time arrival, shoe covers on, and your property treated with care.
Upfront Pricing
You approve a clear, flat-rate cost before any work begins.
Guaranteed Workmanship
10-year parts, 2-year labor, and a 6-month follow-up on installs.
Community First
A local Orange County business, invested in the neighborhoods we serve.
Proven Results
Recent Jobs Around Mission Viejo
Oso Creek • AC Replacement
From an R-22 relic to 28% lower bills, right-sized high-efficiency system, new returns, 10-year warranty.
Casta del Sol • Heat Pump
All-electric heat pump with a $2,000 rebate captured, quieter, safer, and cheaper to run.
Deane Homes • Air Flow Fix
Fixed the upstairs that never cooled, duct balancing and a properly sized return, no new equipment needed.
Serving Every Mission Viejo ZIP Code
From 92691 to 92694, and every 55+ community in between, most Mission Viejo homes see a technician the same day they call.
926919269292694
Call (949) 590-3296
Quick Dispatch Guarantee
- GPS-tracked technicians routed across South OC
- Fully stocked vehicles, most repairs done first visit
- No dispatch fees with completed repairs
Our technicians are strategically routed across South Orange County, meaning we usually have someone minutes from your door.
Customer Reviews
Hundreds of homeowners across Mission Viejo and Orange County trust One Season for honest, reliable HVAC service.
Our shop is at 7700 Irvine Center Dr in Irvine, only about a 15-minute drive to the heart of Mission Viejo. We can usually get out same-day, next-day at the latest. Summertime we can get booked out quick, so call (949) 590-3296 and get our live schedule availability.
-
⭐️⭐️⭐️⭐️⭐️ Update: We completed a regular maintenance service and a couple of weeks later our thermostat disconnected from our WiFi. When I attempted to reconnect, I selected an incorrect setting. OneSeason came out a day earlier then I scheduled to fix this new problem and they got it fixed and let me know my mistake. Once again, great service from an exceptional company! Top-Notch HVAC Installation – Professional, Efficient, and Honest! I couldn’t be happier with my experience working with One Season HVAC for a full system installation. From the initial consultation to the final walkthrough, every step was handled with professionalism and care. The team arrived on time, walked me through all of my options, and helped me choose the best system for my home without any pressure or upselling. Their knowledge and honesty were refreshing. The installation itself was seamless—clean, efficient, and completed ahead of schedule. What impressed me most was the attention to detail. They treated my home with respect, ensured everything was working perfectly, and even followed up afterward to make sure I was satisfied. The new system is running flawlessly, and I’ve already noticed a big difference in comfort and efficiency. If you’re looking for reliable experts who take pride in their work, I highly recommend One Season HVAC. They’ve earned my trust and future business!
K&V California
March 31, 2026Thank you to One Season Heating & Air — I had no idea how thorough a furnace tune-up could be until now! The technician took the time to show me the blower motor and explained how dirty it had gotten. It was eye-opening and really showed the value of proper maintenance. I’ll be signing up for their yearly maintenance plan to make sure our system is serviced twice a year and that my family is breathing clean air year-round. This team has been truly amazing to work with — highly recommend One Season!
Steve Wissman
December 22, 2025These guys are the real deal. Honest. Reliable. We had a big HVAC issue that they solved timely. We felt fully taken care of and would absolute recommend this company.
Dan D.
February 19, 2026 -
The company I give five stars. Excellent response and follow through with great communication from their office. The technician I give six stars. Very knowledgeable, fast, friendly and a great communicator advising me on the condition of my equipment and what I might expect going forward.
Dennis Toussieng
March 20, 2026I have used many AC companies over my years but none have been as complete in their Preventative Maintance as One Season Heating and Air. They are the only company that I will use Thank You
l g
January 9, 2026Great company that was referred to me in 2024 by a good friend. Used them to install new ductwork, routine system inspection and may continue to use them in the future as needed!
Koley Anthony
January 13, 2026 -
The One Season Heating and Air Conditioning is truly amazing! My wife and I had originally set an appointment to conduct a tune up on our system for the season. To our surprise the system which was originally installed a year prior wasn’t installed properly. Aubrey educated us on the things that were done wrong and how the system should’ve properly been installed. My wife and I decided to have the entire system in the house done properly. The crew came the next day and pulled the job in a few hours time! Now our system works the way it should, and our electric bill has gone down as well. One Season Heating and Air Conditioning will be the only HVAC company we ever call for what we need.
Alan Cerna
December 15, 2025I was able to get an appointment even with very hot weather quickly and we got a new customer introductory price . Technician Daniel told me in advance what he was going to do and he cleaned our outdoor enclosed condensor unit. Our prior HVAC company had gone out of business so a couple of theur good employees in the service field noe work at One Season. They appear to be a good company to service a person's unit.
Terry Potucek
December 20, 2025I had a replacement A/C installed today. I would give One Season 6 stars, if I could. They were the best of 6 bidders I had. Aubrey had worked with me tirelessly to find a solution for my very difficult space constrains. He and Mike were also super patient while working out the "legalize" of the contract, which I was insisting on. And finally, they both as well as Josh and Ben have done a superb job replacing a condenser and a coil today. Everything was done meticulously, all my questions answered, every step of the process explained. All 4 were were nice and extremely professional. The work areas and the house front were left clean. I highly recommend this company for anyone's heating or A/C work.
Walter Patton
February 4, 2026
CA License #1038022
5 Stars · 300+ Google & Yelp Reviews
10-Year Parts Warranty
100% Satisfaction Guarantee
Good Questions, Straight Answers
Do you service 55+ communities like Casta del Sol and Palmia?
Yes. We work in every Mission Viejo 55+ community and know their common builder systems well.
How fast can you get to my Mission Viejo home?
We are 15 minutes up the 5, most Mission Viejo calls are handled same-day, and 24/7 emergency calls are dispatched immediately.
My home still has an R-22 system, can you help?
Absolutely. R-22 is phased out, so we will get you running today and walk you through replacement options with no pressure.
Are you licensed to do HVAC work in Mission Viejo?
Yes, California CSLB license #1038022, fully insured, with a 10-year parts and 2-year labor warranty on installs. We pull permits per City of Mission Viejo requirements.
Do you offer maintenance plans for Mission Viejo homes?
Our Season Pass covers twice-yearly tune-ups plus repair discounts. A fall furnace check and spring AC check catches most failures before they happen.
What ZIP codes do you cover in Mission Viejo?
We cover 92691, 92692, and 92694, all of Mission Viejo.
Get in Touch
Get Same-Day HVAC Service in Mission Viejo
Call now and talk to a real person, or book online and we’ll confirm your arrival window within minutes.
(949) 590-3296 · 24/7 Emergency Line
7700 Irvine Center Dr #800, Irvine, CA 92618
Book Your Free Estimate
No obligation, flat-rate pricing. We’ll contact you within 15 minutes.
What to Expect from Us
Clear Communication & Honest Advice
Straight answers about what your system needs, and what it doesn't.
Punctual, Respectful Technicians
We show up on time and treat your home like our own.
Upfront Pricing, No Surprises
Flat-rate quotes approved by you before work begins.
Guaranteed Workmanship & Satisfaction
Backed by a 10-year parts and 2-year labor warranty.
