Tierrasanta, San Diego Air Conditioning Services

Same-Day Air Conditioning Services in Tierrasanta

Tierrasanta has plenty of sunny days to enjoy, but no one wants that heat following them inside. Guthrie & Sons is a family-owned company right here in San Diego, offering fast air conditioning services in Tierrasanta for central AC, ductless mini splits, and heat pumps. From repairs to new installs, we’ll make sure your home stays comfortable. Contact us for an appointment!

Trusted Tierrasanta Air Conditioning Services from the Guthrie & Sons Team

Inland neighborhoods like Tierrasanta feel every bit of San Diego’s heat, with summer temps spiking into the 90s and Santa Ana winds that make it even tougher to cool down. That’s why it helps to have a local air conditioning company you can call the moment things heat up. At Guthrie & Sons Heating, Air & Solar, we provide fast, same-day air conditioning services in Tierrasanta, San Diego, California, so you don’t have to wait to get the AC service that you need.

From quick repairs to brand-new installations and full system replacements, we handle it all. As a family-owned air conditioning company in San Diego, we serve both homes and smaller commercial spaces in Tierrasanta. Because we live and work here too, we understand the houses, the businesses, and the local weather. Call today or schedule your AC service in Tierrasanta, CA, online—and we’ll make sure your place feels comfortable again in no time.

Expect Honest Pricing and Helpful Ways to Save Money

Expect Honest Pricing and Helpful Ways to Save Money

No one likes hidden costs or surprise bills when it comes to fixing or replacing an air conditioner. You don’t deserve that, and we don’t do it. With us, you’ll always get a clear estimate, straightforward explanations, and guidance on how to save money wherever you can. From rebates and promotions to financing options, we keep your air conditioning services as affordable as possible. Here’s how we can help:

  • Free in-home estimates
  • Online quoting tool available anytime for installs and replacements
  • Help navigating rebates and tax credits to lower your cost
  • Seasonal promotions that add extra savings
  • Convenient financing plans to better fit your budget


At Guthrie & Sons, you’ll know what you’re paying for—and you’ll feel confident about the team working in your home. Schedule your Tierrasanta air conditioner service today!

Maintenance Plans

Make Managing Your Air Conditioner Easier with the Guthrie & Sons USA Membership

Imagine not having to worry about your AC giving out during the first big heat wave. No scrambling for emergency service, no sweating it out while waiting for a part. With our Guthrie & Sons USA Membership, we make sure your system gets the attention it needs before trouble starts.

You’ll get scheduled tune-ups, reminders so you don’t have to keep track, priority service when demand spikes, and discounted rates if a repair ever comes up. It’s simple, it’s affordable, and it keeps your home comfortable all season long.

Central AC, ductless mini split, or heat pump—whatever cools your house, regular care keeps it running stronger for longer. A new system can cost you thousands. A yearly membership? Not even close, and it’ll pay you back in fewer repairs, lower bills, and peace of mind. Talk to our team today about getting started.

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How Can We Help You Today? Learn More About Our Air Conditioning Services in Tierrasanta

How Can We Help You Today? Learn More About Our Air Conditioning Services in Tierrasanta

At Guthrie & Sons, we’re family-owned, local, and proud to serve every part of Tierrasanta—from Tierrasanta Norte and the Bluffs to the many different townhome communities.

Our NATE-certified technicians (that’s North American Technician Excellence, the top standard in HVAC training) are ready to help with both residential and light commercial air conditioning services. Need your AC repaired over by the Rec Center? Have a heat pump that’s giving you trouble near Mission Trails? No problem—wherever you are in Tierrasanta, we’ll be there to get your system running again.

Air Conditioning Services

Air Conditioning Services

Central air conditioners are the most common way Tierrasanta homes stay cool, and when they’re sized and maintained properly, they can keep every room comfortable through long inland heat waves. Our air conditioning services in Tierrasanta cover everything these systems need—first-time installations in homes that never had AC, seasonal tune-ups to keep efficiency up, fast repairs when parts wear out, and full replacements once a unit reaches the end of its life. No matter the age or brand of your central AC, we have the experience to keep it running strong.

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Many Tierrasanta homes were never set up with central AC. That means a first-time install isn’t just dropping in a unit; it’s building the system from the ground up. With our air conditioning installation in Tierrasanta, we design and install new ductwork where needed, size the system correctly for your home, and place the equipment so air flows evenly from room to room.

Changing filters regularly is something homeowners can handle, but the deeper work should be left to a pro. Our air conditioning maintenance in Tierrasanta includes coil cleaning, drain line flushing, refrigerant checks, and electrical inspections—things that make a major difference in how your AC system performs, how long it lasts, and what you’ll be paying for it.

When your AC stops cooling, it’s rarely a total system failure—it’s usually one or two parts giving out under stress. Our air conditioning repair in Tierrasanta covers everything from refrigerant leaks and capacitor replacements to blower motor failures and thermostat issues. We stock common parts on our trucks so we can fix most problems in a single visit and get your home cooling again without long delays.

Most systems last 10–15 years before efficiency drops off and repairs start stacking up. Our air conditioning replacement in Tierrasanta focuses on making the upgrade as easy as possible: we remove the old unit, check that your ductwork can handle the new system, and install a high-efficiency model that’s right-sized for your home. The result is lower utility bills, fewer service calls, and reliable cooling that stands up to Tierrasanta’s heat.

Ductless Mini Split Services

Ductless Mini Split Services

Ductless mini splits are a flexible option for cooling in Tierrasanta, whether you use them as the main system or to supplement central AC. They don’t rely on ductwork—instead, each indoor unit pulls in warm air, cools it with refrigerant from the outdoor condenser, and pushes cooled air directly into the room. That means less energy loss, quiet operation, and targeted comfort. Our ductless mini split services in Tierrasanta include installation, maintenance, and replacement, so you get the full range of support no matter how you’re using your system.

Our ductless mini split installation in Tierrasanta gives you flexibility that central systems can’t. Indoor units can be mounted on walls, recessed into ceilings, or set as floor consoles—ideal for spaces like upstairs bedrooms, converted garages, townhomes with limited space, or backyard ADUs. Each unit creates its own “zone,” so you can cool only the rooms you’re using instead of the whole house. We’ll help design a setup with one unit or multiple zones connected to a single outdoor condenser, giving you cooling where you need it most without overloading the system.

Because mini splits run a lot of hours and rely on small filters, regular maintenance is key. Our ductless mini split maintenance in Tierrasanta includes deep cleaning the filters and coils, flushing drain lines, and checking refrigerant pressure so each zone delivers steady cooling. Routine service also prevents issues like water leaks, blocked airflow, or reduced efficiency, keeping your unit working like new for longer.

After about 10–15 years, most ductless systems lose efficiency and can’t keep up with Tierrasanta’s summer heat. Our ductless mini split replacement in Tierrasanta upgrades you to a new, high-efficiency model with better controls, quieter operation, and improved zoning options. We’ll remove the old equipment, install the new system, and make sure each zone is balanced so every space stays comfortable.

Heat Pump Services

Heat Pump Services

In Tierrasanta, many homeowners are looking for smarter ways to stay cool without the high bills that come with older central AC systems. That’s why heat pumps are gaining ground. An air-source heat pump runs like a central air conditioner in summer—using an outdoor condenser and indoor air handler to move heat out of your home—but it’s built to be more efficient and use less energy. Our heat pump services in Tierrasanta include installation, maintenance, repair, and replacement, giving you everything you need to make the switch or keep your current system running strong.

With our heat pump installation in Tierrasanta, the process looks a lot like setting up a central AC system. We place an outdoor condenser, connect it to an indoor air handler, and tie everything into your ductwork so cool air moves evenly throughout the house. The big difference? A heat pump uses advanced refrigerant technology to transfer heat more efficiently than traditional central AC. That means lower utility bills, quieter operation, and steady cooling even during the hottest weeks.

Heat pumps see heavy use in Tierrasanta’s inland climate, so maintenance is critical. Our heat pump maintenance in Tierrasanta includes coil and filter cleaning, refrigerant checks, and electrical inspections to keep efficiency high and prevent costly breakdowns. Regular upkeep also helps your system last years longer, sparing you from premature replacement.

If your heat pump starts short cycling, blowing warm air, or leaving some rooms hot while others cool, it’s time to call for service. Our heat pump repair in Tierrasanta addresses the common problems—low refrigerant, worn fan motors, electrical issues—that keep systems from performing. Most repairs can be handled the same day, so your home cools off quickly.

After 12–15 years, most heat pumps begin losing efficiency and may run nonstop without delivering the cooling power they once did. Our heat pump replacement in Tierrasanta upgrades your system to a modern, high-efficiency model designed to handle San Diego’s inland heat while lowering your monthly bills. We remove the old unit, set up the new one, and ensure it’s tuned for your home’s ductwork and layout.

HVAC System Services

HVAC System Services

Tierrasanta homes range from older properties built before central AC was standard to newer houses and townhomes that need more efficient systems. Some families here run a traditional central AC with a furnace, while others are switching to all-electric heat pumps to stay ahead of California’s energy changes. Our HVAC system services in Tierrasanta cover installation, maintenance, repair, and replacement—so whatever setup you have, we’ll keep it running strong.

For first-time installs or system upgrades, our HVAC installation in Tierrasanta starts with an in-home consultation. We look at the layout, size, and cooling needs of your home, then recommend the right type of system and provide a clear quote. Once you’re ready, we install the equipment, add ductwork if your home doesn’t have it, and test everything to make sure airflow is balanced and working properly before we leave.

There are small steps homeowners can take—like changing filters, keeping vents clear, and trimming back plants near the outdoor unit. But full HVAC maintenance in Tierrasanta requires a professional. Our technicians clean coils, check refrigerant, tighten electrical connections, and catch small issues before they become breakdowns. With our maintenance plan, you’ll get scheduled tune-ups and reminders so you never have to think twice about it.

Signs of a problem show up fast in Tierrasanta’s heat—weak airflow, hot rooms, or a system that runs all day without cooling. Our HVAC repair in Tierrasanta fixes issues like refrigerant leaks, thermostat failures, and worn-out motors. With stocked trucks and experienced techs, most problems can be solved the same day so your home gets comfortable again quickly.

After 12–20 years, most systems lose efficiency, and repairs start to add up. Our HVAC replacement in Tierrasanta takes out the old equipment and installs a modern, high-efficiency system that’s matched to your home. Whether that means a new central AC, a furnace, or a heat pump, you’ll notice more consistent cooling and lower bills.

As a Daikin Pro Elite Contractor, we offer HVAC system monitoring in Tierrasanta for Daikin equipment. Remote monitoring lets us track performance, identify small problems early, and come prepared with the right information and parts if a repair is needed. That means fewer surprises and quicker fixes when something’s not right.

The Air Conditioning Company Locals Have Loved Since 2005

The Air Conditioning Company Locals Have Loved Since 2005

Guthrie & Sons has been serving Tierrasanta families since 2005 with the same guiding principle Wes Guthrie started the company on: treat people right and do the job properly. Today, his sons carry that forward, making sure every interaction feels respectful and never rushed. We want you to have a long-term relationship with a trusted HVAC contractor—so whether it’s air conditioning services in Tierrasanta, a new heating system, indoor air quality upgrades, or even a heat pump water heater or solar install, you know who to call.

When you schedule an air conditioner service with us, you can expect clear answers, fair pricing, and workmanship that holds up. Here’s what makes Guthrie & Sons different:

  • 100% Customer Satisfaction Guarantee: If something’s not right, we’ll fix it.
  • Upfront, Honest Pricing: What we quote is what you pay—no gimmicks, no games.
  • Expert Technicians: Our team services and installs all makes and models.
  • Family-Owned: We’re one of the last family-run HVAC companies in the area.
  • Lifetime Workmanship Guarantee: When we install something, we make sure it lasts.
  • 2-Year Labor Warranty: Every new installation comes with a 2-year labor warranty.
  • Free Quotes on New Systems: Get a clear installation estimate before buying.
  • Convenient Financing Options: We offer payment plans to fit your budget.
  • Property Protection Guarantee: From drop cloths to clean-up, we protect your space.

Frequently Asked Questions

A window AC can be fine for cooling a single bedroom or small apartment in Tierrasanta, and it costs less up front. But if you’re trying to cool an entire house, central air usually ends up cheaper and more efficient. Running two or three window units often costs more than one well-sized central AC system.

On hot Tierrasanta days, it’s normal for an AC to run 12–16 hours to keep the house cool. If it’s running all the time but not cooling well—or barely runs at all—something’s likely wrong, like a clogged filter, low refrigerant, or a system that’s too small for your home.

With SDG&E’s time-of-use billing, power is most expensive from 4 to 9 p.m. That’s also when homes in Tierrasanta hold onto the day’s heat. Pre-cooling your home earlier or raising the thermostat a few degrees during those hours can help you save.

If your AC blows warm air, takes forever to cool, or has ice forming on the outside lines, it may be low on refrigerant (often called Freon). Refrigerant doesn’t run out on its own, so this usually means there’s a leak. A licensed technician can find the leak, repair it, and refill the system.

Most AC systems can cool your home to about 20°F lower than the temperature outside. So if it’s 95°F in Tierrasanta, your AC can usually keep the house around 75°F. Trying to push it lower puts extra strain on the system and drives up your electric bill.

Real Reviews From Real Customers

We do things differently, and our customers appreciate it. See what some of our thousands of satisfied customers have to say about working with us.

Tania Reyes profile pictureTania Reyes
23:47 05 Dec 25
I’ve been using Guthrie & Sons for over 15 years. They installed my whole AC system and maintained it all those years and never had an issue. Well it was time for an upgrade and they’ve recently installed my second system. The team 15 years ago and the team this time around were both amazing, professional and clean. I can’t recommend them enough Matt, Ben, Christian and Bryan get 10 stars. They are a bit pricier but worth the investment when you have peace of mind and almost two decades of great service and no issues.
Trejos Marcela profile pictureTrejos Marcela
17:27 04 Dec 25
I had an excellent experience with Guthrie & Son AC & Heater Company. Their customer service was outstanding, and they took the time to answer all my questions thoroughly. Every technician who has worked on my AC/heater installation and now the ongoing service has been knowledgeable, respectful, and always on time. I highly recommend them to anyone in need of HVAC services!
I only wish the annual service was cheaper 🙂
Paula Remmel profile picturePaula Remmel
06:34 02 Dec 25
I have a maintenance plan for my heat pump and air conditioner which Guthrie & Sons installed two years ago. I am very happy with my system as well as the maintenance plan. Wayne, one of their excellent technicians, just completed the Fall service and now the system is ready for winter use. He is knowledgeable and has been able to answer any questions I have about my system. In addition, the office at Guthrie & Sons is very responsive and follows through on any questions and concerns within 24 hours if not immediately. Great service from a great company.
Bill Cogan profile pictureBill Cogan
22:04 24 Nov 25
Guthrie & Sons responded immediately to my online request, and was able to send someone out immediately. Zack, our technic-ian was very friendly, professional, knowledgeable and gladly answered all of our questions. He found the problem immediately, and left the work area clean and in good order. We would highly recommend Guthrie & Zack! They are real assets to our community.
Dani P profile pictureDani P
03:27 16 Nov 25
I've been using Guthrie & Sons for over 10 years and two homes. I really like that they are a family-owned and an established business. Always professional, on time, and always quality work. I've used their services from simple routine maintenance to having a new AC installed.I've never had a bad or even mediocre experience; I'm just always overall pleased with their work.
David Downhour profile pictureDavid Downhour
02:47 10 Nov 25
We needed a new A/C and furnace system. Vlad came by to listen and assess our needs, recommend our new Daikin, and put forth our best estimate.

Carson C. and Michael J. came by to install our unit. They were on time, extremely professional and worked diligently to complete everything. They listened to our needs throughout and made adjustments to our specifications. Carson did not leave until we were totally happy with our unit.

This was a great experience all around and I gladly recommend Guthrie and Son's for all your HVAC needs.
Rachel Phillips profile pictureRachel Phillips
22:24 02 Oct 25
We recently had our A/C replaced by Guthrie & Sons, and I cannot recommend them highly enough. After getting five different bids, Guthrie & Sons stood out immediately—not just on price, but on expertise and professionalism. They even brought their engineers out to ensure the work could be done the right way, which gave us tremendous peace of mind.

From start to finish, their team was outstanding. They worked incredibly hard, treated our home with respect, and left everything spotless—truly the cleanest job site I’ve ever seen after a major project. The installation itself was seamless, and the quality of their work shows in every detail.

If you’re looking for a company that combines deep knowledge, excellent craftsmanship, and genuine care for their customers, Guthrie & Sons is it. Absolutely five stars across the board!
Liz Staff profile pictureLiz Staff
17:27 02 Oct 25
We had a wonderful experience with Guthrie and Sons. Anthony was our estimator and he did a very thorough job of explaining all of our options! Matthew, Bryan, and Isaiah were our installers and they were very efficient, capable, and personable. Our home did not have an existing HVAC system so they had to build the whole thing in an older house that had undergone several additions. We were up and running in just three days. They left the worksite clean at the end of each day. We highly recommend Guthrie and Sons!
Neil Domingo profile pictureNeil Domingo
18:09 27 Sep 25
Kareen did an outstanding job with our HVAC system. From start to finish, he demonstrated professionalism, patience, and a strong commitment to getting the job done right. Even when faced with several unexpected challenges, he handled each one with skill and determination, never compromising on the quality of his work.

What really stood out was his problem-solving ability and willingness to go the extra mile to ensure everything was operating as it should. He communicated clearly throughout the process, kept us updated, and made sure we felt confident in the work being done.

It’s not often you come across someone who combines technical expertise with such a strong work ethic and positive attitude. We’re very grateful for his efforts and would highly recommend Kareen to anyone needing reliable HVAC service.
Trae Washburn profile pictureTrae Washburn
02:56 16 Sep 25
Professional from beginning to end

Vlad came out to provide an estimate and was able to size an HVAC system that worked well for my house.

They installed it quickly, without issue and helped me set up an app on my phone to control.

The system is working great to heat and cool my house and is whisper quiet.

Highly recommend going with Guthrie and Sons if you want a high quality experience for large and important purchases.
David Maycock profile pictureDavid Maycock
01:10 08 Sep 25
Our two old furnaces needed replacing and so we contacted Guthrie & Sons because of their good reputation. They sent Zach the next morning. He quickly verified that our two furnaces were beyond repair and Guthrie could supply and install suitable replacement funaces. He also suggested and explained alternative solutions, but we eventually decided to go ahead with furnace replacement. As soon as we notified Guthrie & Sons of our decision they arranged for Cristian and Pablo to come to our house the next day. They did a good job, explained clearly how to operate the new furnaces and thermostats, and were respectful of our house.
Erin Guthrie profile pictureErin Guthrie
19:21 03 Sep 25
Daniel was quick and professional. Fixed our AC problem in an hour and the price was very transparent and beyond fair. Didn’t push the subscription maintenance service, simply said it would be a good idea due to the age of our unit. Highly recommend!
Tomankhamen profile pictureTomankhamen
18:03 28 Aug 25
We had to replace a thermostat that had gone bad. In the old days, I could do it myself. Now, though, the programming of the thing requires technical knowledge that I don’t have. The Guthrie guy that did the job was courteous, professional, and as fast as anyone could be. This has been our experience with Guthrie & Sons for every repair, retrofitting, and equipment replacement that they’ve done for us over quite a number of years now.
Gabrielle Benjamin profile pictureGabrielle Benjamin
18:15 25 Aug 25
Carson Snyder and co-worker (Pablo?) did a great job on the installation of the mini-split cassette. They're hard working, they clearly knew what they were doing, polite, cleaned up afterwards, true professionals. I'd gladly recommend these two gentlemen. However, the Company was not good at keeping me informed although I mentioned to the salesman up front that I was information driven. They were short on details and communicated seldom. Anthony did tell me about the government program available that reduced my cost. I wouldn't have known about it if he didn't mention it. The City did approve their work and signed off on the permit which is an indication of the job done right. I think the Company can improve their customer service
robert johnson profile picturerobert johnson
00:53 11 Aug 25
Very pleased with the service we received from Guthrie & Sons! Our AC system needed to be replaced after a huge leak. The tech that came out for diagnosis, Mario, took the time to explain the issue to us, as well as our options for repair. They came out on a Saturday to diagnose and it was fixed the following Tuesday. Matthew was the worker that completed the repair and he did an excellent job. Pricing was reasonable. Much more reasonable than the first company we had come out to take a look. We upgraded our system and our SDG&E bill has already gone down. Highly recommend!
K N profile pictureK N
15:52 01 Aug 25
Very knowledgeable and professional. Quoted product was high quality and fair pricing. I highly recommend We ended up not going with them only due to the fact we were also getting Solar and ended up going with one company for our project but I would definitely do business with this company in the future if we need it!
LeRoy Lafferty profile pictureLeRoy Lafferty
17:25 31 Jul 25
We had Guthrie and Sons replace our 50 year old house heater with a heat pump. We are very satisfied with the installation performed by Matthew and Andriy. We were impressed with the detail of their work. They paid particular attention to the required sealing and insulating of the system. Even the HERS testing inspector was impressed with their work. We were also impressed by their professionalism and honesty. They gave us an unexpected partial refund off our signed contract.
Nannette Moyer profile pictureNannette Moyer
17:41 29 Jul 25
We have been using Guthrie & Sons for 3 years and I really can’t say enough good things about them. Our technician Mario was incredibly helpful with our most recent AC issue. He spotted the problem quickly and was very knowledgeable when explaining what was happening. I appreciate their honest and fair pricing and would recommend to family and friends. Glad to have an honest company especially with all the price gauging company’s out these days.
Meghan Venanzi profile pictureMeghan Venanzi
23:31 22 Jul 25
We were incredibly impressed with the prompt and professional service! We called on a Saturday morning, and within just a few hours, a technician was at our home. With the recent heat, getting our AC back up and running was a top priority—and they delivered! Mario clearly explained our options and provided a hassle-free solution that was both quick and effective. The repair was completed shortly after we gave the go-ahead. We’ll absolutely be using them again for any future HVAC needs. Highly recommend this company for their affordability, efficiency, and friendly service—we’re already telling our family and friends! Thanks again Guthrie & Sons!
Laurie Edwards profile pictureLaurie Edwards
22:10 16 Jul 25
We were very happy from start to finish. Vlad did a great job in helping us decide what would be best for our house and our needs and the installation crew were the very best. Thank you Guthrie and Sons for a job well done.

Schedule Your AC Service in Tierrasanta Today

We love the Island in the Hills, and we know you do, too. You want to take care of your home or business here, which is why you need trusted air conditioning installers and repair contractors who are the best at what they do. Were you just out at Kumeyaay Lake, the Mission Trails Golf Course, or the community pool, and came home to a hot house? Or, are you interested in installing central AC or a mini split? Talk to us about what we can do for you.

Schedule your air conditioning service in Tierrasanta, San Diego, today and let Guthrie & Sons Heating, Air & Solar keep you cool and comfortable.

8248 Ronson Road
San Diego, CA 92111
(619) 269-3013
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