Solar and HVAC Services in Tierrasanta, San Diego

The Tierrasanta HVAC Contractor You Can Call for It All

Tierrasanta may be the Island in the Hills, but without the right heating and cooling equipment, your home won’t feel like the paradise it should be. Summers here get hot and dry, winters bring chilly nights, and both put your system to the test. At Guthrie & Sons, we handle it all—HVAC services to keep you comfortable and solar solutions to put all that sunshine to work. As your Tierrasanta HVAC contractor, we’re here for every installation, repair, and upgrade.

Same-Day Heating, Cooling, Indoor Air Quality, and Solar Services in Tierrasanta, CA

Most people in Tierrasanta have a story about being burned by an HVAC company—waiting around for someone who never shows, dealing with a rushed job that breaks again a month later, or getting stuck with a bill that doesn’t match the quote. It leaves you wondering who you can actually trust.

We’ve heard the stories, and we’ve been in your shoes before. But that’s also the type of service that our founder set out to change. At Guthrie & Sons Heating, Air, & Solar, we’re a local HVAC contractor in Tierrasanta, San Diego, California, that’s continued to earn the community’s trust since 2005. We provide residential and light commercial HVAC services and also install solar products that continue to save you money.

With Guthrie & Sons as your HVAC contractor in Tierrasanta, you don’t have to wonder what kind of service you’ll get—you’ll know. Call today or book online, and let’s make your home more comfortable and cost less to manage.

The Guthrie Way

The HVAC Contractor Tierrasanta Families Have Trusted for Years

At Guthrie & Sons, being your HVAC contractor in Tierrasanta isn’t just about keeping your system running—it’s about making sure you feel taken care of every step of the way. We’re a second-generation, family-owned company, and since 2005, we’ve built our reputation on honesty, respect, and work that lasts. Whether it’s a quick repair, a brand-new install, or just answering your questions, here’s what you can always expect from us:

5-Star Service

We show up when we say we will, do expert work, and leave your home as clean as we found it. Every visit matters, and we treat you like a neighbor, not just another call on the schedule.

Clear Pricing

No surprises and no padded bills here. We give you clear, straightforward pricing before the work starts so you know exactly what to expect.

Skilled Technicians

Our techs are NATE-certified (North American Technician Excellence), the top certification in the HVAC industry. That means your home and HVAC equipment are truly in the best hands.

Family-Owned

Since 2005, we’ve been serving Tierrasanta and the surrounding neighborhoods as a proud, second-generation family business. This is more than our job—it’s our home too.

No Pushy Sales

We don’t believe in upselling or pressure tactics. If a repair will solve the problem, that’s the solution we’ll recommend. Our job is to keep you comfortable, not sell you something.

Did You Know That You Can Stop Many Breakdowns Before They Happen? Here’s How

Most HVAC breakdowns we get called out for could have been prevented with simple maintenance. The problem is, life gets busy—and scheduling tune-ups is easy to forget. That’s why we created the Guthrie & Sons USA Membership Plan: to keep your system protected without you having to think about it.

When service gets skipped, energy bills creep up, airflow weakens, and equipment gives out right when you need it most. With our plan, we stay on top of everything—sending reminders, booking your visits, and going through a full checklist to keep your system running at its best. Membership benefits include:

Priority Scheduling: Get help fast when your system goes down.
Automatic Reminders: We track it for you so maintenance never slips.
Repair Discounts: Pay less when parts or labor are needed.
Preventive Checkups: Catch small issues before they turn into costly repairs.
And More!

You can learn more online, or give us a call with any questions. We can tell you why so many Tierrasanta homeowners say the USA Membership more than pays for itself.

Maintenance Plans

Worried About Your Budget? Let’s Talk Financing and Smart Ways to Save

When your air conditioner quits or you’re suddenly faced with a big furnace repair, the thought of covering the cost all at once can feel overwhelming, and it may not be possible. But waiting months to fix it usually isn’t an option either.

That’s why we offer financing with approved credit, so you can get the work done now and pay it off over time. As your Tierrasanta HVAC contractor, we’ll walk you through the options, answer your questions, and get everything set up so your project can move forward without delay.

If you’d like to explore your options first, our website has everything in one place: pricing details, seasonal promotions, financing information, and even information on tax credit opportunities. You can also use our free online quoting tool to see some numbers before you decide.

Learn More About Financing

Heating and Cooling Services in Tierrasanta, San Diego, CA

Life in Tierrasanta stretches from Tierrasanta Norte to the Bluffs, the townhome communities near the Rec Center, and the homes tucked close to Mission Trails Regional Park. Whether it’s hiking around Kumeyaay Lake, swimming at the community pool, or playing a round at Mission Trails Golf Course, this neighborhood keeps you active. But when summer heat pushes into the 90s or winter nights get chilly, your home should always feel comfortable.

At Guthrie & Sons, we’re proud to be the HVAC contractor in Tierrasanta that people trust for fast service at fair prices. Isn’t that what we all want? Explore our heating and air conditioning services in Tierrasanta below and let us know how we can help you.

Air Conditioning Services

Tierrasanta gets hot fast in the summer, and when the Santa Ana winds blow through, the heat can stick around well into the evening. If your AC isn’t up to the job, your home turns uncomfortable in a hurry. Our air conditioning services in Tierrasanta cover everything—new installs, regular tune-ups, quick repairs, and full replacements—so your system is ready when you need it most.

Air Conditioning Installation

A lot of homes in Tierrasanta were built before central AC became standard. Adding one now is a major upgrade. With our air conditioning installation in Tierrasanta, we look at your home’s layout, size the system correctly, and add all the ductwork. We’ll give you a great air conditioner that you can rely on for years.

Air Conditioning Maintenance

Most breakdowns we see could’ve been avoided with a little upkeep. Our air conditioning maintenance in Tierrasanta includes cleaning filters and coils, checking refrigerant, and making sure all parts are working the way they should. It’s a short visit that saves you money on repairs and helps your system last longer.

Air Conditioning Repair

When your AC starts blowing warm air, struggling to cool upstairs bedrooms, or making strange noises, it’s time for air conditioning repair in Tierrasanta. We fix the common problems—bad motors, refrigerant leaks, clogged drains—so your home cools down again.

Air Conditioning Replacement

Once an AC is 10–15 years old, it often costs more to keep fixing it than to replace it. Our air conditioning replacement in Tierrasanta gives you a new, high-efficiency system that lowers your energy bills and cools your home more reliably—no more sweating it out when the heat kicks in.

Mini Split Services

Homes in Tierrasanta range from older builds with no ductwork to newer houses that still struggle with hot spots upstairs or in other areas. That’s why our mini split services in Tierrasanta are such a good fit. These ductless systems give you direct heating and cooling in the rooms that need it most. We handle everything so your home stays comfortable.

Mini Split Installation

When you schedule a mini split installation in Tierrasanta, we help you choose the right system size and number of indoor units for your space. A single-zone setup may be perfect for a home office, while multi-zone systems can serve several bedrooms or an ADU.

Mini Split Maintenance

Even though ductless systems don’t rely on bulky ductwork, they still collect dust and need servicing. Our mini split maintenance in Tierrasanta includes deep filter cleaning, drain line flushing to prevent water leaks, and refrigerant inspections to protect efficiency. Keeping up with service not only avoids costly repairs but also ensures your system runs smoothly.

Mini Split Replacement

If your mini split is more than 10–15 years old, struggles to keep up with demand, or leaves you with rising electric bills, let us replace it. During your mini split replacement in Tierrasanta, we’ll quickly remove the old unit and install a modern system that better meets your needs.

Heat Pump Services

A heat pump does the job of both an air conditioner and a heater. In the summer, it pulls heat out of your home to keep things cool, and in the cooler months, it reverses to bring warmth inside. Our heat pump services in Tierrasanta include installation, maintenance, repair, and replacement—so no matter the season, your home stays comfortable with one efficient system.

Heat Pump Installation

With our heat pump installation in Tierrasanta, you get a system that replaces the need for a separate furnace and AC. The outdoor unit pairs with an indoor air handler to provide even, all-electric heating and cooling. Many newer models feature variable-speed technology, which means they automatically adjust their output to match your needs.

Heat Pump Maintenance

Because heat pumps run year-round, they need more frequent service than a furnace or AC alone. Our heat pump maintenance in Tierrasanta covers coil cleaning, refrigerant checks, electrical testing, and mode-change inspections. Regular maintenance not only prevents breakdowns but also keeps efficiency high.

Heat Pump Repair

When something goes wrong with your heat pump, it often shows up as uneven temperatures, a system that won’t switch modes, or energy bills that climb faster than usual. Our heat pump repair in Tierrasanta handles problems like refrigerant leaks, sensor failures, blower motor issues, and more.

Heat Pump Replacement

Most heat pumps last about 10–15 years before efficiency drops and repair costs add up. When it’s time for a new one, our heat pump replacement in Tierrasanta gives you access to the latest models that are quieter, more efficient, and better at handling both summer heat and cool winter mornings. Upgrading means fewer repair calls, lower monthly costs, and reliable comfort for years ahead.

HVAC Services

From the AC that cools your living room to the thermostat that runs it all, every piece of your system matters. Our HVAC services in Tierrasanta keep everything working together the way it should. Whether you’re starting fresh with a new install, staying on top of maintenance, scheduling a repair, or planning a full system replacement, we’ve got you covered.

HVAC Installation

The right system starts with the right design. With our HVAC installation in Tierrasanta, we look at your home’s layout, insulation, and comfort needs before recommending a setup. That might mean a traditional AC paired with a furnace, a high-efficiency heat pump, or ductless mini splits for hard-to-cool spaces. Once the plan is set, we handle the full install so your system is reliable from day one.

HVAC Maintenance

Regular service keeps small issues from becoming big problems. Our HVAC maintenance in Tierrasanta includes filter checks, coil cleaning, refrigerant inspections, and full system testing. A couple of tune-ups a year helps lower your energy bills, improve indoor air quality, and keep your system running strong through hot summers and cool evenings.

HVAC Repair

When your system quits, waiting days for a fix isn’t an option. Our HVAC repair in Tierrasanta covers everything from thermostat failures and noisy motors to refrigerant leaks and weak airflow. We show up quickly, troubleshoot thoroughly, and explain the solution in plain terms so you know exactly what’s happening before we get to work.

HVAC Replacement

Every system eventually reaches the point where repair costs outweigh the benefits. Our HVAC replacement in Tierrasanta helps you choose a modern, efficient unit that fits your home and budget. Whether you’re looking to stick with a furnace-and-AC combo or switch to all-electric, we’ll walk you through your options and handle the upgrade smoothly.

HVAC System Monitoring

As a Daikin Pro Elite Contractor, we offer advanced HVAC system monitoring in Tierrasanta that tracks your system’s performance around the clock. We can catch small issues before they become major breakdowns, make remote adjustments when possible, and arrive prepared if an on-site visit is needed. It’s one more way to keep your home running comfortably without surprises.

Heating Services

Nights in Tierrasanta can cool down quickly, especially during the fall and winter months. Having a reliable heating system makes all the difference in staying comfortable. Our heating services in Tierrasanta cover everything—new installations, routine tune-ups, same-day repairs, and full replacements. With California shifting toward electric heating, we can also help you explore energy-efficient heat pumps and ductless systems that keep you warm now and meet future standards.

Heating Installation

Every home in Tierrasanta is different, which means no one system fits all. Our heating installation in Tierrasanta starts with assessing your space, insulation, and energy use. While many homes still run on natural gas or propane furnaces, more homeowners are switching to all-electric heat pumps that handle both heating and cooling. We’ll walk you through each option, explain costs and efficiency, and install the system that fits your home best.

Heating Maintenance

Skipping annual service often leads to breakdowns right when you need heat most. Our heating maintenance in Tierrasanta includes cleaning burners, tightening electrical connections, checking safety controls, and testing airflow. In about an hour, we can extend the life of your system, boost efficiency, and cut down on unexpected repair bills.

Heating Repair

From faulty thermostats to worn-out motors, heating problems show up in different ways. With our heating repair in Tierrasanta, we troubleshoot quickly, explain what went wrong, and give you clear repair options before we start. We keep common parts on hand, which means many repairs can be done the same day.

Heating Replacement

After 10–15 years, most heating systems become less efficient and more expensive to maintain. Our heating replacement in Tierrasanta gives you the chance to upgrade—whether that means a new high-efficiency furnace, an electric heat pump, or a ductless mini split. We’ll compare your choices, handle removal and installation, and make sure your new system is set up to run smoothly from the start.

Furnace Services

Even though San Diego is known for sunshine, Tierrasanta nights can dip low enough that a working furnace is very much needed. Our furnace services in Tierrasanta cover everything—installation, repair, maintenance, and replacement—so your home stays comfortable when the temperature drops. Whether you’re holding onto an older gas furnace or considering switching to an efficient electric system, we’ll keep your furnace safe, reliable, and ready whenever you need heat.

Furnace Installation

If you’re building a new home, finishing an addition, or converting a space that’s never had heat, our furnace installation in Tierrasanta gives you a system built from the ground up. We start by calculating the right size for your square footage so it won’t run too hard or too weak. Then we design the airflow setup, making sure ductwork is sealed and balanced for even heating.

Furnace Maintenance

Dust buildup and worn parts are common issues in older furnaces. Our furnace maintenance in Tierrasanta includes a full inspection—cleaning burners, checking filters, testing safety controls, and tightening components. A once-a-year tune-up helps prevent surprise breakdowns and extends the lifespan of your furnace.

Furnace Repair

Typical calls for furnace repair in Tierrasanta involve failed ignitors, noisy blower motors, or systems that cycle on and off too often. Our team arrives prepared with the parts most likely to fail so we can fix many problems on the spot. We’ll explain the issue and cost clearly before starting work.

Furnace Replacement

If your furnace is struggling with uneven heating, frequent repairs, or high utility bills, it may be time to upgrade. Our furnace replacement in Tierrasanta provides modern, high-efficiency models that heat more evenly, run quieter, and save energy. We handle removal, installation, and testing so your home is ready for the next cold night.

Indoor Air Quality Services

In Tierrasanta, it’s not just outdoor smog or canyon winds that affect your air—everyday life inside your home adds to the mix. Cooking, cleaning, pets, and older ductwork can spread dust, dander, and odors from room to room. Add in pollen and traffic pollution, and the air indoors can feel far from fresh. Our indoor air quality services in Tierrasanta help clear contaminants, balance humidity, and make every breath at home healthier.

Air Purifier Installation and Repair

With our air purifier installation in Tierrasanta, we set up whole-home systems that connect to your HVAC and filter dust, allergens, and odors. Instead of using small plug-in units in each room, you get clean, fresh air across your entire home from one powerful system.

If your purifier isn’t catching dust or odors the way it used to, we can help. Our air purifier repair in Tierrasanta restores your system so it effectively removes fine particles and allergens again, giving you fresher, cleaner air.

CO Detector Installation

Carbon monoxide is invisible and odorless but dangerous. That’s why we offer carbon monoxide detector installation in Tierrasanta homes. These monitors provide constant protection and peace of mind that your family is safe.

Dehumidifier Installation and Repair

High humidity can make your home feel muggy and may even cause musty smells or mold. Our dehumidifier installation in Tierrasanta ties into your HVAC system to keep indoor moisture at the right level, protecting your home while making it feel more comfortable.

When your dehumidifier runs nonstop, makes noise, or isn’t lowering humidity, it’s time for a repair. We provide dehumidifier repair in Tierrasanta to get your system working properly again, so your home feels dry and fresh instead of sticky.

Duct Sealing

Leaky ductwork is common in Tierrasanta’s older homes and leads to uneven temperatures and wasted energy. Our duct sealing service closes those leaks, improves efficiency, and reduces dust blowing through your vents for cleaner, more consistent airflow.

Media Air Cleaner Installation

Standard filters don’t catch everything. That’s why we install media air cleaners in Tierrasanta homes—thicker filters that trap smoke, pet dander, and fine dust particles. They last longer than standard filters and help your HVAC system deliver noticeably cleaner air.

Thermostat Installation, Repair, and Replacement

Our thermostat installation and replacement services in Tierrasanta give you better control of your comfort. From simple programmable models to smart thermostats you can adjust from your phone, we’ll set up the right option for the way you move through life and help lower your bills.

A broken thermostat can cause your system to run too often—or not enough. Our thermostat repair in Tierrasanta gets it working correctly again.

UV Air Cleaner Installation

Our UV air cleaner installation in Tierrasanta adds a layer of protection inside your HVAC system. These lamps neutralize bacteria, mold, and viruses before they circulate through your home, making the air healthier for your family to breathe.

UV Light Installation

Moisture near your AC coil creates a perfect environment for mold and mildew. With our UV light installation in Tierrasanta, we place lights by the coil to keep it clean, prevent odors, and improve your system’s efficiency.

Solar Services

Tierrasanta’s sunny days make it the perfect place to go solar. We install rooftop panels, battery systems, and EV chargers so you can cut utility bills and rely less on the grid. With energy rates in San Diego climbing, solar isn’t just about going green—it’s about keeping your home powered affordably and efficiently year after year.

Heat Pump Water Heater Services

Tight on space but need steady hot water? A heat pump water heater is a smart fit for Tierrasanta homes. It uses heat from the air to warm your water, which means lower bills and no oversized tank hogging your garage or utility area. We install and service heat pump water heaters so you can free up space and enjoy dependable hot water every day.

Fun Facts About Tierrasanta

Look for a contractor who checks all the right boxes: licensed in California, fully insured to protect your home, and transparent about pricing and the work being done. Don’t just glance at star ratings—take time to read reviews to see how they communicate, too. And if you’re still unsure, ask for references—you should always feel comfortable and confident about who’s coming into your home.

Yes—people love living in Tierrasanta! It’s a quiet, suburban part of San Diego with a strong community feel, good schools, and quick access to freeways without the heavy traffic of busier neighborhoods. With parks, canyons, and trails nearby, it’s popular for families and anyone who enjoys a balance of city access and outdoor space.

He sure did. Professional skateboarder Tony Hawk grew up in Tierrasanta, and many locals still remember seeing him skate around the neighborhood as a teenager. His connection to the area is a point of pride for longtime residents.

Tierrasanta, which means “holy land” in Spanish, was once part of the Mission San Diego de Alcalá’s ranch lands. In the 20th century, it was used by the military before being developed into a residential community in the 1970s. Today, it’s a well-established neighborhood known for its family-friendly atmosphere and canyon landscapes.

Like much of inland San Diego, Tierrasanta enjoys mild, sunny weather most of the year. Average highs run in the 70s for much of spring and fall, climbing into the 80s during summer. Winters are cooler, with highs in the 60s and nighttime lows that can dip into the 40s.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.

Make an Appointment with Guthrie & Sons, a Top HVAC Contractor in Tierrasanta, San Diego

At Guthrie & Sons Heating, Air & Solar, we know calling an HVAC contractor in Tierrasanta isn’t something you look forward to. That’s why we make it simple: we answer the phone, show up when we say we will, and respect your home while we work. Our crew focuses on real solutions that last, not quick fixes that leave you calling again in a month.

Whether it’s keeping your AC running through a heatwave, setting up solar panels to cut your bills, or installing a new water heater, we’re here to help. When you’re ready for service you can trust, give us a call and we’ll be there!

8248 Ronson Road
San Diego, CA 92111

(619) 269-3013