Solar and HVAC Services in San Carlos, San Diego

Guthrie & Sons Is Your Local San Carlos HVAC Contractor

San Carlos sits right up against the hills, and that means warm, sunny days and cool evenings. At Guthrie & Sons Heating, Air & Solar, we make sure your home stays comfortable through all of it. From dependable heating and cooling services to solar solutions that help you make the most of San Diego sunshine, we’ve got it covered. As your trusted San Carlos HVAC contractor, we’re here for system installations, repairs, replacements, and energy upgrades that fit the way you live.

Contact Us for Heating, Cooling, Indoor Air Quality, and Solar Services in San Carlos

Contact Us for Heating, Cooling, Indoor Air Quality, and Solar Services in San Carlos

San Diego’s weather is pretty wonderful, but when your AC quits in August or your heater won’t start on a cold January night, it matters who you call. You want an HVAC contractor who shows up, knows what they’re doing, and treats your home with respect. In San Carlos, San Diego, California, that’s Guthrie & Sons Heating, Air & Solar.

Since 2005, we’ve been providing heating, cooling, indoor air quality, and solar services across all of our wonderful San Diego communities. Our expert technicians handle residential and light commercial HVAC services in San Carlos. We also install solar solutions that help you make the most of the sunshine we get year-round. You shouldn’t have to second-guess who to call when something isn’t working or you need something new installed. Just reach out to Guthrie & Sons and we’ll get it done!

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The HVAC Contractor San Carlos Families Continue to Count On

The HVAC Contractor San Carlos Families Continue to Count On

At Guthrie & Sons, we know there are plenty of HVAC contractors in San Carlos to choose from. We take real pride in being one of the few family-owned companies still doing this work the way it should be done. 

Since 2005, we’ve built our reputation on honest service, skilled workmanship, and treating people with respect. Whether you need a repair, a full system install, or just straight answers, here’s what you can expect from us.

Our technicians arrive in uniform and in clearly marked vehicles. We show up when we say we will, explain what we’re doing from start to finish, and make sure your HVAC or solar system is running the way it should. We respect your space and your time.

You’ll always know the cost upfront. There are no hidden fees, and we even have a free online quoting tool for you to explore. Our team will share complete details on what’s needed and why, so you can make a confident decision about your home.

Our NATE-certified technicians (North American Technician Excellence) install, maintain, and service all makes and models of heating and cooling systems. We truly do have some of the best HVAC technicians in the industry.

We’re not a franchise or a call center—we’re a local, family-run company that’s been servicing San Diego County since 2005. The people answering the phones and doing the work care about the outcome. We put people first, not profits.

If a repair will safely fix the issue, that’s what we’ll suggest. If replacement makes more sense, we’ll discuss why and show you the numbers. We don’t push upgrades you don’t need. You’ll get expert advice based on what’s best for your home and your budget.

Fewer Heating and Cooling Repairs Start With One Simple Plan—Ours

Most heating and cooling systems don’t fail without warning. They lose efficiency, run longer, and wear down slowly over time. The issue is that it’s easy to miss those signs until the system finally stops working. Regular maintenance keeps small problems from turning into big ones—and that’s exactly why we created the Guthrie & Sons USA Membership Plan. 

When tune-ups are skipped, systems work harder, energy bills climb, and parts wear out faster. With our plan, we handle the timing and the details. We send reminders, schedule your visits, and run through a full maintenance checklist to keep everything operating the way it should. Membership benefits include:

  • Priority Scheduling: When something goes wrong, you move to the front of the line.
  • Automatic Reminders: We track your service dates so you don’t have to.
  • Repair Discounts: Save on parts and labor if a repair is needed.
  • Preventive Checkups: Catch small issues early before they turn into bigger ones.
  • Additional Member Perks: Extra value is built in throughout the year.

You can read more about the plan online or call us to talk it through. We’ll show you how the USA Membership helps protect your comfort and your budget year after year.

Need Some Flexibility? Let’s Look at Financing and Ways to Save

A new HVAC system or major repair is an investment, and it’s okay to want options. We offer financing with approved credit so you don’t have to postpone needed work. As your local San Carlos HVAC contractor, we’ll explain costs clearly, review any rebates or special offers, and provide information on our financing plans so you can spread payments out. Talk to our team and we’ll find a way forward. 

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Heating and Cooling Services in San Carlos, San Diego

Heating and Cooling Services in San Carlos, San Diego

From Cowles Mountain to Lake Murray, Mission Trails, and the San Carlos Recreation Center, this is a neighborhood that keeps you moving. But life at home should be comfortable, and that starts with your heating and cooling system.

At Guthrie & Sons, we’re proud to be the San Carlos HVAC contractors people call for fast service and fair pricing. Whether you need a quick repair, routine maintenance, or a full system upgrade, we’re ready to help. Take a look at our heating and air conditioning services in San Carlos below and let us know what you need.

Air Conditioning Services

Air Conditioning Services

San Carlos is the hottest neighborhood in the City of San Diego—literally! It gets much hotter here than it does along the coast. Our cooling services in San Carlos keep your air conditioner running strong so your home stays cool, comfortable, and ready for whatever the forecast brings.

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Many San Carlos homes were built in the late 1960s and 1970s, and not all of them were designed with modern central air in mind. With our air conditioning installation in San Carlos, we handle everything from equipment selection to final testing so your home is ready for summer.

A lot of AC problems start with dirt buildup or small parts wearing down over time. Our air conditioning maintenance in San Carlos includes cleaning coils, replacing filters, checking refrigerant levels, testing electrical components, and making sure airflow is where it should be.

When your AC blows warm air, cycles on and off constantly, or won’t turn on at all, you need a quick air conditioning repair in San Carlos. We diagnose issues like failed capacitors, worn motors, refrigerant leaks, frozen coils, and clogged drain lines. Your AC will be fixed, fast.

If your system is older or needs frequent repairs, it may be time for air conditioning replacement in San Carlos. We remove the old unit, install the new equipment to code, and make sure everything is dialed in so you feel the difference right away.

Mini Split Services

Mini Split Services

If you have an older home in San Carlos that doesn’t have central HVAC or you need extra heating and cooling for a certain space, ductless mini splits are your answer. We install them throughout entire homes or in places like converted garages, bonus rooms, back bedrooms, enclosed patios, and more. Our ductless mini split services in San Carlos keep them running strong for years.

A single indoor unit might be perfect for a home office or sunroom, while a multi-zone system can handle several rooms or an ADU. During your mini split installation in San Carlos, we size the equipment correctly and mount the indoor units cleanly so they look neat and work perfectly.

Our mini split maintenance in San Carlos includes cleaning filters and coils, flushing condensate lines, checking electrical connections, and testing system performance. Routine service is recommended yearly so we can prevent leaks and lessen the chances of sudden breakdowns.

Over time, mini splits lose efficiency and parts start wearing out. Our mini split replacement in San Carlos includes safely removing the old system and setting up a newer model that uses less energy and responds better to temperature changes.

Heat Pump Services

Heat Pump Services

Heat pumps are a great fit for San Carlos because they handle both cooling and heating in one system. In the summer, they move heat out of your home to keep it cool. When winter nights dip into the 40s, they reverse and bring warmth back inside. Our heat pump services in San Carlos include installation, maintenance, repair, and replacement, so your home stays comfortable year-round with one energy-efficient setup.

If you’re interested in a heat pump installation in San Carlos, we can talk to you about the best systems to buy and expertly install yours. We’ll talk about things like SEER ratings, variable-speed technology, and smart controls that improve your comfort and lower energy use.

Since a heat pump runs most of the year, skipping service catches up with you. Our heat pump maintenance in San Carlos includes cleaning and testing all of the indoor and outdoor equipment so it can continue to cool your home properly.

When people call for a heat pump repair in San Carlos, it’s often because the air isn’t cold, the system has frozen over, or the unit is cycling on and off. Our team can address issues like low refrigerant, worn motors, faulty sensors, and control board problems very quickly.

Most heat pumps give you about 10 to 15 years, sometimes longer with good maintenance. When yours starts struggling to keep up or needs bigger repairs, a heat pump replacement in San Carlos will return things to normal. We’ll make the entire process feel smooth and easy.

HVAC Services

HVAC Services

Guthrie & Sons’ HVAC services in San Carlos are focused on keeping heating and cooling working together the way they should. Whether you’re installing something new, maintaining what you have, fixing a problem, or replacing an older setup, we handle the whole system.

For your HVAC installation in San Carlos, we look at square footage, insulation, ductwork, and how you use the space. Some homes do well with a furnace and AC, others are better suited for a heat pump, and some benefit from adding a ductless unit to certain rooms.

Most manufacturers require routine maintenance to keep the warranty valid, and skipping it can leave you paying out of pocket for parts that might have been covered. Our HVAC maintenance in San Carlos keeps you on track, especially when you enroll in our maintenance program.

When the system stops cooling, makes unusual noises, or struggles to keep temperatures even, it needs attention. Our HVAC repair in San Carlos covers failed capacitors, worn motors, thermostat problems, airflow restrictions, and refrigerant issues.

Older systems eventually cost more to keep running than they’re worth. With a new HVAC replacement in San Carlos, we help you decide whether to stick with your current setup or upgrade to something more efficient. Everything will be done efficiently and to code.

As a Daikin Pro Elite Contractor, we offer HVAC system monitoring in San Carlos that keeps an eye on performance behind the scenes. The system tracks operation and alerts us if something isn’t right. That means small issues can be fixed faster because we have the info we need.

Heating Services

Heating Services

San Carlos gets plenty of sunshine, but once the sun goes down, it can cool off quickly. When that chill settles in, you can count on Guthrie & Sons for reliable heating services in San Carlos. We service and install gas and electric furnaces, heat pumps, and ductless mini splits to keep your San Diego home warm and cozy.

Homes in San Carlos range from older ranch-style houses to condos and two-story properties, and each one heats differently. Each heating installation in San Carlos starts with a consultation before we move into pricing and system selection. You’ll get a great system at a great price.

Our heating maintenance in San Carlos includes inspecting burners, checking heat exchangers, tightening electrical components, testing safety controls, and more. When we do that each season, your heating system can last years longer and save you more money.

If your heater is blowing cool air, making odd noises, or constantly turning on and off, it’s time to have it checked. Contact us for a same-day heating repair in San Carlos so we can find the issue quickly, whether it’s a failing igniter, worn motor, faulty thermostat, or a clogged filter.

When repairs start adding up or your system is over 12–15 years old, it may make more sense to upgrade. Our heating replacement in San Carlos gives you several smart options, from high-efficiency furnaces to modern heat pumps that both heat and cool your home.

Furnace Services

Furnace Services

California is steadily moving toward electric systems, but the reality is that many homes in San Carlos still rely on gas furnaces. At Guthrie & Sons, we service both gas and electric systems. Our furnace services in San Carlos can keep your current furnace in great shape or help you plan for the future with a new unit. We can also help you explore a heat pump!

If you’re adding central heat, our furnace installation in San Carlos focuses on proper sizing and airflow from the start. We calculate heating load based on square footage, insulation, and layout so your system doesn’t short cycle or struggle to keep up.

When a cold front rolls through San Carlos, your furnace needs to be able to kick right on. Our furnace maintenance in San Carlos is about getting ahead of problems before they turn into no-heat calls. We inspect the entire system and make adjustments and repairs on the spot.

Furnace won’t turn on? Blowing cold air instead of warm? Making loud noises or turning on and off? Call us for a quick furnace repair in San Carlos. We’ll track down the root cause and either clean, repair, or replace parts so your home returns to a warm, comfortable temperature.

Many furnace issues can be fixed, but sometimes, a new system is either required or will be recommended. With our furnace replacement in San Carlos, we evaluate your home, talk about your budget (financing is available!), and discuss the furnace options that may be right for you.

Indoor Air Quality Services in San Carlos

Indoor Air Quality Services in San Carlos

San Carlos homes deal with more than just warm days and cool nights. Between nearby traffic, seasonal winds, canyon dust, and everyday indoor living, air quality can take a hit. Cooking fumes, pet dander, older ductwork, and tightly sealed windows all trap particles inside. Our indoor air quality services in San Carlos focus on cleaning the air you breathe, managing humidity, and improving airflow so your home feels fresher and healthier year-round.

If you’re constantly dusting, dealing with allergies, or noticing lingering odors, a whole-home solution may help. During your air purifier installation in San Carlos, we connect the system directly to your HVAC so every room benefits, not just one corner with a portable unit. We size and install it properly for your airflow so it filters effectively without restricting performance. If yours isn’t working well, our air purifier repair in San Carlos restores strong filtration so your air feels noticeably fresher.

Carbon monoxide has no smell or warning signs, which makes it dangerous in homes with gas appliances or attached garages. Our carbon monoxide detector installation in San Carlos places reliable monitors in the right locations for accurate detection. Proper placement and setup matter—it’s about early warning and real peace of mind for your family.

If parts of your home feel damp, musty, or sticky—especially bathrooms or lower levels—excess moisture could be the issue. Our dehumidifier installation in San Carlos integrates with your HVAC system to balance indoor humidity without over-drying the air. We size the system to your home’s needs and ensure proper drainage and airflow. When performance drops, our dehumidifier repair in San Carlos gets humidity levels back under control.

Uneven temperatures, excess dust, or weak airflow often trace back to leaking ducts. Our duct sealing in San Carlos closes gaps that pull in attic dust and push conditioned air into unused spaces. Sealing improves comfort room to room and helps your HVAC system run more efficiently.

If standard filters aren’t keeping up with fine dust or pet dander, a stronger solution may be needed. With a media air cleaner installation in San Carlos, we install high-capacity filtration that captures smaller particles without choking airflow. The right system lasts longer and delivers cleaner air throughout the home.

If your home never quite feels comfortable or your system cycles too often, the thermostat may be the problem. Our thermostat installation and replacement in San Carlos ensures you have accurate control, whether you prefer programmable or smart options. When readings are off or your system won’t respond, our thermostat repair in San Carlos restores reliable communication and balanced comfort.

If you’re concerned about bacteria or mold circulating through your HVAC system, added protection may help. Our UV air cleaner installation in San Carlos places lights inside the system where air passes through, helping neutralize biological growth before it spreads. Proper placement and a professional installation make the system safe and effective.

Musty odors or recurring coil buildup can signal moisture-related growth inside your system. With UV light installation in San Carlos, we position lights near the indoor coil to reduce mold and mildew at the source. A cleaner coil improves airflow, supports efficiency, and helps your air smell fresher.

Solar Services in San Carlos

Solar Services in San Carlos

San Carlos sees a lot of sun throughout the year, and that sunlight can do more than just brighten your day. With rising utility rates in San Diego County, installing solar is one way to take more control over your monthly energy costs. Our solar services in San Carlos include rooftop panel installation, battery backup systems, and EV charger setup so your home can generate, store, and use power more efficiently. Talk to our team about what we can do for you.

Heat Pump Water Heater Services in San Carlos

Heat Pump Water Heater Services in San Carlos

As more San Carlos homes move toward electric appliances, heat pump water heaters are becoming a popular upgrade. Our heat pump water heater services in San Carlos include professional installation, maintenance, and repairs for these high-efficiency systems. They use ambient air to heat water, helping cut energy bills while keeping hot water consistent for daily use. Get your quote today!

Fun Facts About San Carlos, San Diego

Look for licensed, insured HVAC contractors with strong local reviews and years of experience. A good San Carlos contractor should be transparent about pricing, clear about your options, and make you feel comfortable. You can always ask for references, too!

San Carlos is highly regarded as one of San Diego's safest and most family-oriented neighborhoods. Residents enjoy access to top-tier public schools and an abundance of outdoor activities right in their backyard. Its central location provides easy 20-minute commutes to downtown, the beaches, and major employment hubs.

Originally part of the ranch lands of the old Mission San Diego, the area was transformed into a master-planned suburb starting in the late 1960s. It was officially founded in 1970 and developed by Carlos Tavares, who named the community after himself. The neighborhood’s development was largely shaped around its natural landmarks.

San Carlos has a warm Mediterranean climate with hot, dry summers and mild winters. Summer temperatures often climb into the 80s and 90s, while winter evenings can dip into the 40s. The dry air and seasonal Santa Ana winds are common features of the area’s climate.

The neighborhood is most famous for being the home of Cowles Mountain, the highest point in the City of San Diego at 1,593 feet, which offers breathtaking panoramic views. It is also celebrated for Lake Murray, a popular man-made reservoir that serves as a hub for fishing, jogging, and the annual Fourth of July Fireworks and Music Fest.

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.

Rocky profile picture
Rocky
23:03 09 Mar 26
I highly recommend Guthrie & Sons; from setting the appointment to the actual service!! Daniel was prompt, able to take care of our issue at a very reasonable price. I will be using them for all our needs in the future!!!! Thanks Daniel and Mackenzie.....you were great!!
Troy Nabatilan profile picture
Troy Nabatilan
00:21 15 Feb 26
Matt and Bryan are truly the A-Team! Their teamwork was outstanding and the workmanship was meticulous. The air handler was carefully installed, wiring neatly secured, plenum perfectly fitted, and the condenser precisely positioned and leveled for proper clearance and vibration control. The line set was pressure-tested and vacuumed as well. They also left the work area clean and neat.

Please congratulate them for a job well done!
Johnathan Yang profile picture
Johnathan Yang
18:56 07 Feb 26
Guthrie and Sons was very professional and communicative. Matthew and Bryan did incredible work, and followed up with a lot of testing to make sure my new unit was functioning well. They went above and beyond to ensure that things were done correctly. I could tell their standards were extremely high, and I felt relieved seeing how much care they took in their installation. I’m very pleased with the result!
Sunyim Kim profile picture
Sunyim Kim
18:45 06 Feb 26
I called to estimate to install central air conditioner on our second floor condo. Manager came the next day very punctual and knowledgeable about the process. He listened carefully our concerns and let us to make a decision. We truly appreciate his professionalism. Thank you for your service and I would recommend anyone who needs heating and air conditioning services in San Diego.
saul profile picture
saul
18:45 06 Feb 26
Guithre and Sons distinguish themselves not only through their high level of professionalism but also by their unwavering commitment to the quality and durability of every product they sell and the meticulous craftsmanship involved in each project. The company operates with a strong dedication to integrity and respect, fostering long-term relationships with clients and suppliers alike. They prioritize transparency and ethical standards in all business dealings, ensuring customer satisfaction and trust at every interaction. Their customer service team is exceptionally responsive and knowledgeable, consistently exceeding expectations to resolve issues swiftly and effectively.
Ariana Lujan profile picture
Ariana Lujan
17:43 20 Jan 26
Very helpful, quick and easy to schedule! We had an unexpected (but necessary) repair when doing maintenance and both the office and tech Carson were thorough and transparent in their support. Great service!
Graham Davis profile picture
Graham Davis
15:37 18 Jan 26
After dealing with several HVAC companies, Guthrie & Sons clearly stood out as the most ethical, honest, and reliable. From the very beginning, their approach felt transparent and genuinely focused on what was best for us—not on upselling or unnecessary replacements.

We worked with Vlad T., who had previously been out to our home and saved us tens of thousands of dollars by getting our existing AC unit up and running when other companies were pushing for a full replacement. That experience alone earned our trust.

Now that we’re finally ready to purchase new units, there was no question that Guthrie & Sons was the only company we would consider, and Vlad was the obvious choice. He was extremely professional, punctual, and exceptionally knowledgeable, taking the time to explain options clearly and thoroughly. His expertise and honesty made the entire process straightforward and stress-free.

If you’re looking for an HVAC company you can truly trust—one that values integrity, quality workmanship, and customer service—I cannot recommend Guthrie & Sons and Vlad T. highly enough. This is how service should be done.
Blas Falconer profile picture
Blas Falconer
19:35 17 Jan 26
The layout of my condo made installing splits challenging, and before I met with Guthrie and Sons, three companies either told me that it couldn't be done. Vlad studied my apartment until he found a way to install with minimal openings in the walls and without a second condenser. Mallory, who works in the office, always followed through and advised me when I ran into a hiccup and needed detailed plans for the city. My HOA appreciated Guthrie and Sons' thoroughness and was so impressed with the design, that another resident who had been wanting splits for years, decided to install splits at the same time. The team that came in was knowledgeable, professional, and hard working. They finished a day ahead of time. I'm thrilled with the way everything looks and works.
Rob profile picture
Rob
18:12 12 Jan 26
This is by far the best company for your HVAC needs. They are honest very caring. Good fair pricing and got the job done efficiently and on time. I also signed up for their bi-yearly service which they performed the winter one and went very well. Thanks
Tania Reyes profile picture
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 profile picture
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 profile picture
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 profile picture
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 profile picture
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 profile picture
David Downhour
02:47 10 Nov 25
We bought our HVAC system from Guthrie & Sons. They have been monitoring our system online and later noticed a heat sensor issue.

Zach M. came by and installed on new one. He was extremely professional and completed the installation promptly.

This was another great experience all around and I gladly recommend Guthrie and Son's for all your HVAC needs.
Rachel Phillips profile picture
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 profile picture
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 profile picture
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 profile picture
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 profile picture
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.

Make an Appointment with Guthrie & Sons, Your San Carlos HVAC Contractor

If you’re searching for HVAC contractors near me in San Carlos, you can feel confident calling Guthrie & Sons Heating, Air & Solar. We answer the phone, communicate clearly, and show up prepared to do the job right. Our technicians are respectful, straightforward, and focused on improving your comfort—not rushing through the visit to get to another call. 

Let us show you why we’re the HVAC contractors San Carlos, San Diego, relies on and recommends. Call or schedule online today!

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