Solar and HVAC Services in Del Mar, CA

Reliable Heating, Cooling, and Comfort Solutions From a Team You Can Count On

Need a quick AC repair? Thinking about upgrading your heating system? Curious if solar power could save you money? At Guthrie & Sons Heating, Air & Solar, we’re your all-in-one team for home comfort in Del Mar.

With transparent pricing, skilled service, and no pushy sales, we’ll make sure your home or business stays comfortable — today, tomorrow, and for years to come. Contact us for an estimate!

Del Mar’s Choice for Cooling, Heating, Indoor Air Quality, and Solar Services

Most days, Del Mar's sunshine brings comfort. But when summer heats up or the evenings turn chilly, Guthrie & Sons is here to keep your indoor environment just right with top-tier residential and commercial HVAC services in Del Mar, California.

From homes near Seagrove Park to businesses along Camino Del Mar, we install AC units, maintain heating systems, and provide reliable repair, maintenance, and replacements. Looking to breathe cleaner air or tap into solar energy? We’ve got that covered too — all in one place!

At Guthrie & Sons, we’re more than a business — we’re a family legacy. Passed down through generations, our company is built on trust, care, and a commitment to doing things the right way. That means when you call us, you get the family treatment — genuine care, honest solutions, and no pushy sales.

And with NATE-certified technicians who are truly the best in the business, you can expect five-star service every time. Contact us today — we’re ready to help!

The Guthrie Way

Service Backed by Integrity, Experience, and Family Values

As a family-owned company with our name on the line, we take great pride in our work. That means we do things the Guthrie Way. Here’s what you can expect when you call us for service:

5-Star Service

We take pride in setting the gold standard for HVAC service in the local area. Our dedicated team of experts is committed to delivering nothing less than 5-star service in every aspect of our work. Your comfort is our commitment.

Honest Pricing

When we say no hidden fees, we mean it. Our pricing is upfront and transparent, with no fine print or gimmicks. Before we get to work, we’ll walk you through your options and give you a clear breakdown of the costs.

Expert Technicians

Not all technicians are created equal. Ours are NATE-certified — the highest standard in the industry. Whether it’s a simple repair or a complex installation, we bring experience and expertise to every home we enter.

Family Values

We’ve been family-owned and operated for generations, and we treat every customer like one of our own. We’re proud to bring personal care and dedication to every job. When you call us, you’re not just getting a service — you’re becoming part of the Guthrie family.

No Upsells

We’re not here to sell you what you don’t need. Our job is to find the best solution for you, not our bottom line. You can always count on our team for honest recommendations that prioritize your needs and your budget.

Protect Your Home and Wallet With Our USA Membership Plan

Your comfort, health, and safety are our priorities, and we know that a reliable heating and cooling system is key to all three. While plenty of Del Mar HVAC companies offer maintenance plans, our USA Membership Plan goes further to better meet your needs and save you money.

Regular maintenance is the best way to avoid costly repairs and keep your system running longer. We’ll reach out when it’s time for service in Del Mar, so you never miss a tune-up, even with your busy schedule. As a member, you’ll enjoy repair discounts, lower service call fees, and priority scheduling. Talk to your technician about signing up, or give our office a call to learn more!

Maintenance Plans

Budget Concerns? We Offer Flexible Financing for Your Comfort Needs

Nobody plans for a heating or cooling system to fail, but when it happens, Guthrie & Sons has options to help make investing in new equipment more affordable. Our flexible financing options help you get the heating and cooling system you need now while paying over time. Ready to explore your options? Call us at (619) 269-3013 — we’ll walk you through everything.

Learn More About Financing

Air Conditioning Installation

We specialize in air conditioning installation for both new construction and older homes without AC. Our custom systems are designed for maximum comfort and efficiency. We handle everything from ductwork to unit selection.

Air Conditioning Maintenance

Protect your system from breakdowns with our detailed air conditioning maintenance in Del Mar. Our thorough tune-ups boost efficiency and help extend your AC’s life.

Air Conditioning Repair

Is your AC underperforming, making odd noises, or not turning on at all? Our experienced technicians deliver fast, accurate air conditioning repair in Del Mar to get you back to comfort quickly.

Air Conditioning Replacement

If your AC is over 10 years old, needs constant repairs, or isn’t cooling efficiently, it may be time for an air conditioning replacement. We'll help you choose a new energy-saving system tailored to your home.

Mini Split Installation

Ideal for sunrooms, guest suites, or additions, our mini split installations provide comfort without major renovations. We’ll customize and install a system that meets your space’s unique requirements.

Mini Split Maintenance

Salt air and daily use can wear down your system. Our maintenance service includes cleaning filters, checking refrigerant levels, and inspecting electronics to keep your mini split running strong.

Mini Split Repair

If your mini split is acting up — cycling unevenly or displaying errors — we’ll find the problem fast. From refrigerant issues to sensor failures, we deliver reliable ductless mini split repair in Del Mar.

Mini Split Replacement

Struggling with an old or inefficient mini split? We’ll inspect your current unit and recommend a high-efficiency replacement that’s ideal for Del Mar’s climate.

Heat Pump Installation

A heat pump is a smart, efficient choice for Del Mar homes. We evaluate your home’s layout and energy usage to recommend the right system for consistent performance.

Heat Pump Maintenance

Even in our mild climate, heat pumps work hard year-round. Our routine maintenance keeps your system clean, efficient, and reliable.

Heat Pump Repair

From strange noises to uneven temperatures, we troubleshoot heat pump problems fast. Count on us to fix leaks, wiring issues, or malfunctioning components.

Heat Pump Replacement

Frequent breakdowns or high bills may mean it’s time for a new system. We’ll install a modern, energy-efficient heat pump that saves you money while keeping your home comfortable.

HVAC Installation

We don’t just install systems — we design HVAC solutions based on your home’s unique needs. Let us help you choose a system that delivers long-term comfort and efficiency.

HVAC Maintenance

Like oil changes for your car, HVAC maintenance is essential. We follow detailed checklists to catch problems early and ensure your system performs at its best.

HVAC Repair

Strange sounds, inconsistent airflow, or temperature issues? Our expert HVAC repair services resolve problems fast so you can get back to comfort.

HVAC Replacement

If your system is old and inefficient, our HVAC replacement service offers a hassle-free upgrade. We’ll handle everything and ensure you know how to use and care for your new unit.

Heating Installation

Need a new heating solution? From selection to installation, we’ll help you choose the best system — and make sure it runs efficiently from day one.

Heating Maintenance

Our thorough heating maintenance includes cleaning and inspecting every component, helping prevent breakdowns and lower energy costs.

Heating Repair

If your heater is noisy or blowing cold air, we’re ready to help. Our team provides clear explanations and fast heating repair — no gimmicks, just honest solutions.

Heating Replacement

Ready for an upgrade? We’ll walk you through heating replacement options and install a system that fits your home’s needs and energy goals.

Furnace Installation

A properly sized furnace matters. We measure and install units tailored to your home’s specific heating needs for consistent comfort.

Furnace Maintenance

Annual service keeps your furnace running safely and efficiently. We clean burners, check for leaks, and test safety controls before colder months hit.

Furnace Repair

Weak airflow? No heat? Odd noises? We provide responsive furnace repair in Del Mar to quickly restore warmth to your home.

Furnace Replacement

If your furnace is inefficient or constantly breaking down, we offer expert furnace replacement with energy-saving models and professional installation.

Air Purifier Installation

Improve your indoor air with a whole-home purifier that removes dust, pollen, and airborne particles for a healthier environment.

Air Purifier Repair

A malfunctioning purifier can’t do its job. We quickly identify and fix filter or electrical issues to get clean air flowing again.

Dehumidifier Installation

If your home feels muggy or musty, a dehumidifier can help. We install systems that reduce moisture and enhance comfort.

Dehumidifier Repair

Leaks, faulty sensors, or poor drainage? Our dehumidifier repair team handles it all to keep your system running right.

Duct Sealing

Leaky ducts waste energy and hurt air quality. Our duct sealing service finds and fixes leaks to restore clean, efficient airflow.

Media Air Cleaner Installation

Capture more allergens with a media air cleaner. We install systems designed to trap even the smallest particles for better indoor health.

UV Air Cleaner Installation

Target bacteria, viruses, and allergens with a UV air cleaner. We install these systems inside your ducts for powerful protection.

UV Light Installation

Combat mold and bacteria buildup in your HVAC system with UV lights installed near your coils. This keeps air clean and your system healthier.

Home Safety & Comfort Controls

Del Mar homes need comfort systems that do more than adjust the thermostat — they should protect your space and simplify your day. When important devices go unchecked, safety and efficiency can take a hit. We offer safety and control services in Del Mar to help your home function better behind the scenes — for comfort you can count on.

CO Detector Installation

Protect your household with CO detectors installed in key locations. We use reliable models for round-the-clock carbon monoxide monitoring.

Thermostat Installation

Take control of your comfort with a smart or programmable thermostat. We install easy-to-use models that help lower energy bills.

Thermostat Repair

Temperature issues? We troubleshoot and repair faulty thermostats to restore comfort and control.

Thermostat Replacement

Upgrade outdated thermostats for better efficiency. We’ll recommend the right model and handle the replacement seamlessly.

Frequently Asked Questions

Yes! We provide free estimates on replacements for heating, air conditioning, and solar systems. Our team will assess your needs, explain your options, and offer clear pricing — no pressure, no gimmicks. You’ll know exactly what to expect before making a decision.

Absolutely. Our technicians are background-checked and committed to your safety and satisfaction. We only hire qualified, experienced professionals who meet our high standards. With Guthrie & Sons, you’re in trusted hands.

We understand that comfort can’t wait. In most cases, we offer same-day or next-day service, depending on availability. Just give us a call, and we’ll find a time that works for you.

Yes, we handle all necessary permits for your HVAC or solar installation. From navigating local regulations to submitting paperwork, we make sure everything is done by the book. You won’t have to worry about a thing.

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.

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.

Patrice Makovic

17:45 09 Jul 25

Last summer, I used Guthrie and Sons to replace my heating system with a new one and added an air conditioning unit. We also added two different zones in the house to be able to turn the system on independently from one zone to another. From the first contact to the six month maintenance visits, everything has gone smoothly. There were a couple of hiccups, but the company is very responsive and I have never had an issue with them not promptly responding and taking action to figure out and solve any problem. I highly recommend this company.

Carrie Reese

17:06 08 Jul 25

Guthrie & Son's did an amazing job on our new AC units. From sales through install they were all knowledgeable and helpful. They were very quick to get us all setup and when our home posed some unexpected issues they were able to pivot quickly and resolve them. I'd highly recommend them!

Kenneth Adelson

16:04 07 Jul 25

Had use Guthrie in the past for HVAC service, this time had them install a solar attic fan and additional vent. The service, as it had been the first time, was professional, polite, and on schedule. Pricing was fair (and consider that they offered a repeat customer discount without having to be asked). Would be happy to use them again when the need arises.
I offer 4 stars because I'm not a grade inflation sort. Three is sufficient, four is better than average. Five is reserved for knock my socks off amazing in ways I didn't expect - doesn't happen very often.

Patrick Smith

21:42 27 Jun 25

We had central heat and air put in two a year and a half ago. We've need to make a few adjustments to airflow to rooms since then. Each time, they are onsite withing 1-2 days and have resolved the issue each time. Their team is professional and incredibly friendly and knowledgeable. Very happy we went to Guthrie & Sons.

Bennie Beans

15:41 12 Jun 25

Mario was knowledgeable and courteous. He made sure our system would be sized right and that our existing ductwork was able to support the new system. The install team were prompt and efficient. They installed drop cloths and cleaned up inside and out after the job. So far I’ve been very happy with the work Guthrie and Sons have done for us.

Chris Toogood

21:52 06 Jun 25

Great local family business. And you actually get a live person when you call... And the technician was great and they come out quickly. No up selling too. He gave me two different price options on fixing my problem... band aid cheaper way or replacement. Great service.

Nick Schoch

17:58 27 May 25

Jonathan recently inspected the HVAC systems at both my front and guest houses, and I couldn’t be more impressed with his service. He was thorough in his assessment, clearly identifying areas of concern and explaining the recommended repairs in a way that was easy to understand. What stood out most was his honesty and patience—he took the time to answer all my questions without rushing, and I genuinely felt he had my best interest in mind. If you're looking for someone who is knowledgeable, professional, and respectful of your time and property, I highly recommend asking for Jonathan.

Neil Domingo

17:24 15 May 25

If you’re dealing with an AC issue, Mario is definitely one of the best! He quickly diagnosed the problem, worked efficiently, and provided a thorough solution. His expertise and professionalism were clear throughout the entire process. Highly recommend Mario for anyone looking to resolve their AC issues with a reliable and skilled technician.

Phil Lane

17:18 10 May 25

Guthrie and Sons has provided great service. There are many HVAC companies in San Diego to choose from. They provided a very reasonable estimate for replacing our two AC systems. Once we said yes installation happened within days. It was a quality install. They answer the phone quickly when I've had questions. Happy to refer them to others.

Dianne Haase

20:57 02 May 25

Great customer service, technicians always on time and friendly. I’ve had my new hybrid heat pump for a few years and Guthrie & Sons are very proactive making sure everything is running smoothly. Very happy in my decision to use them!

Andrea Kossoudji

01:11 30 Apr 25

Great service!! Jonathan was patient, kind, knowledgeable and extremely professional! I love Guthrie & Sons’ reminder system, notification of the technician enroute, the easy invoice system and immediate emailing of the findings, including detailed photographs of the work completed!! Highly recommend!

james beedon

20:47 23 Apr 25

Last summer my air conditioner couldn't cool the house in the hottest period of summer. The HVAC team I was working with came in and said the coils were leaking, the unit was 20 years old. I requested quotes from 5 different companies, and the variation of prices was huge. I went with Guthrie and Sons for these reasons:
1. Local Company
2. Family Owned
3. Great presentation, no pressure
4. Good products
5. Competitive pricing
Just installed yesterday, so jury is still out on the system, but installation was thorough and great communication so far!

Darius Degher

21:45 22 Apr 25

Carson and Michael were brilliant. The heat pump installation went smoothly, and they are really pleasant and trustworthy fellows. The day after it was installed, I had a plumber at my house. He looked at their work and was impressed. He said it was much cleaner than the way HVAC people usually do it.

Lito Ricasata

19:03 08 Apr 25

First time prospective client of Guthrie and Sons. Very responsive staff in providing updates on my calls. Mario F. came over to check out my existing cooling and heating system and is very thorough and professional in providing necessary information related to repair/upgrades. Pending his quote, my experience with Guthrie and Sons is top notch and most highly recommended.

Updated review: Kareen, Daniel and Michael worked on the AC replacement, relocation of furnace to the attic and replacement of ductwork. Very professional and knowledgeable team in my opinion. Completed the work in a timely and very satisfactory manner.

Schedule Service With Guthrie & Sons Today

At Guthrie & Sons Heating, Air & Solar, we don’t just show up — we show that we care. Whether your home needs a cooling upgrade, a reliable heater, or energy-saving solar solutions, we’re dedicated to providing service that puts you first.

With free estimates, upfront pricing, and flexible financing, we make repairs and upgrades more affordable. And when we’re done, we’ll leave your space just as we found it — only now it’s more comfortable and energy efficient, which means it feels great and is saving you more money. Now that’s a win-win!

Use our website or call (619) 269-3013 to schedule heating, air conditioning, or solar services in San Diego, California, with Guthrie & Sons Heating, Air & Solar.

8248 Ronson Road
San Diego, CA 92111

(619) 269-3013