Solar and HVAC Services in Coronado, CA

Power a More Comfortable, Energy-Efficient Home With Trusted Local Experts

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 Coronado.

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!

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

Coronado’s sunshine keeps things pleasant most days, but when temperatures spike or the marine layer rolls in, your home needs dependable systems. At Guthrie & Sons, we deliver HVAC, indoor air quality, and solar solutions tailored to how Coronado residents live. Whether you’re near the Hotel del Coronado or tucked away in a quiet spot near Tidelands Park, we’re here to help.

From upgrading older AC units to installing new heat pumps and maintaining mini splits, we do it all — installs, repairs, and replacements. Ready to breathe cleaner air or tap into solar savings? Our in-house team handles everything under one roof.

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 Coronado 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 Coronado, 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 Services in Coronado

Summers in Coronado call for serious cooling — and Guthrie & Sons delivers. Whether you need a quick AC fix or want to upgrade to a high-efficiency system, we’ll make the process easy. We’ve worked in homes from Orange Avenue to Spreckels Park and know what works best in the coastal climate.

Air Conditioning Installation

Guthrie & Sons is an expert in air conditioning installation, specializing in new builds and homes without AC. We design custom, energy-efficient systems for your space, ensuring a cool home. We handle everything, from ductwork to system selection, providing a seamless installation.

Air Conditioning Maintenance

Safeguard your air conditioning system from expensive malfunctions with our top-notch maintenance services in Coronado. Our skilled technicians conduct AC tune-ups, enhancing efficiency and prolonging your unit's lifespan.

Air Conditioning Repair

If your AC is underperforming, making strange sounds, or refusing to switch on, it's time to seek professional air conditioning repair in Coronado. At Guthrie & Sons, we leverage advanced tools and extensive experience to diagnose and resolve issues swiftly.

Air Conditioning Replacement

Considering an air conditioning replacement in Coronado? If your unit is more than a decade old, constantly needs repairs, or lacks efficiency, it might be time for an upgrade. Our team can guide you to the perfect energy-efficient system, promising improved cooling and reduced energy costs.

Mini Split Services in Coronado

Mini splits are a great solution for Coronado homes that need zoned comfort and energy efficiency. Whether you’re adding one to a guest suite or replacing an aging system, we’ll tailor your mini split setup to your space. We’ve installed systems throughout Coronado, including homes near the Ferry Landing and Centennial Park.

Mini Split Installation

Ductless mini splits are ideal for managing the temperature in spaces such as revamped garages, sunny rooms, or visitor suites, without the hefty task of setting up ductwork. We tailor and set up ductless mini split systems that cater to your specific needs.

Mini Split Maintenance

In a coastal climate like Coronado, salty air, dust, and daily use can wear down your system faster than you think. Our ductless mini split maintenance includes thorough filter cleaning, refrigerant level checks, and electrical component inspections.

Mini Split Repair

If your mini split isn't warming or cooling as it should, shows error messages, or operates inconsistently, a ductless mini split repair can solve the problem. We'll promptly spot problems such as leaks in the refrigerant, electrical glitches, or malfunctioning sensors and get your comfort back on track swiftly.

Mini Split Replacement

If your mini split is struggling, needs regular repairs, or increases your energy bills, a ductless mini split replacement could be ideal. We assess your current unit and suggest a new, energy-efficient model suitable for Coronado’s climate.

Heat Pump Services in Coronado

Looking to heat and cool your Coronado home with one smart solution? Heat pumps are ideal for our coastal climate — efficient, quiet, and reliable year-round. Guthrie & Sons offers everything from expert installation and biannual maintenance to fast repairs and full system upgrades. We’ve helped homeowners across Coronado improve comfort and cut energy bills with modern heat pump systems.

Heat Pump Installation

Installing a heat pump is a smart decision for Coronado homeowners seeking an efficient, hassle-free heating and cooling solution. We'll evaluate your home's design, insulation, and energy needs to recommend the best unit.

Heat Pump Maintenance

Despite the climate, heat pumps work hard, making regular maintenance crucial. We recommend biannual heat pump tune-ups to monitor refrigerant levels, clean coils, and ensure all parts are functioning correctly.

Heat Pump Repair

Over time, heat pumps may show signs of wear, especially with frequent use. You may observe weak airflow, uneven cooling, or odd sounds. We diagnose these problems quickly, identifying causes like refrigerant leaks, electrical issues, or sensor malfunctions.

Heat Pump Replacement

If your system frequently needs repairs or has stopped working, replacing it with a new heat pump can save time, money, and stress. Older units lose efficiency, leading to increased energy bills. We'll install a new, high-efficiency system that ensures comfort and reduces costs.

HVAC Installation

Installing a new HVAC system involves more than just selecting a model - it's about identifying the best fit for your home. We thoroughly assess your space, considering the size and ventilation needs, to recommend the perfect heating and cooling solution for lasting comfort.

HVAC Maintenance

Ignoring HVAC maintenance is akin to neglecting car oil changes — it's only time before trouble arises. We follow both manufacturer's guidelines and our comprehensive checklist to identify minor issues early, ensuring your system operates efficiently.

HVAC Repair

Unusual sounds, poor airflow, or spots in your home not heating or cooling correctly? These are indications your HVAC system requires help. Ignoring these for too long could escalate a small repair into a big issue. We react swiftly, diagnose the problem, and offer proficient HVAC repairs.

HVAC Replacement

Are you exhausted from constant repairs and increasing energy bills? It's probably time to think about an HVAC replacement. We promise a quick and seamless installation process that won't interrupt your day-to-day activities. Once it's fully operational, we'll instruct you on how to properly use it and also share useful maintenance advice to keep it running efficiently.

Heating Installation

Looking to heat up your space? Our team is ready to assist you in selecting the ideal heating solution for your home. Be it a furnace, heat pump, or a mini split, we'll guide you through the choices and set up a system designed for longevity.

Heating Maintenance

Heating systems need more than a filter change — regular professional upkeep ensures lasting performance and safety. When you reach out to us for heating upkeep, we'll thoroughly clean, examine, and adjust every component. This translates to less frequent malfunctions, reduced power bills, and significantly increased comfort.

Heating Repair

When your heating system starts puffing out chilly air or producing sounds straight from a scary film, it's a signal to reach out to us. We'll identify the problem, clarify the solution, and restore warmth to your house. No detours, no aggressive sales tactics — simply straightforward heater repairs that accomplish the task.

Heating Replacement

If your heater is nearing its end, replacing it doesn't need to be daunting. We'll guide you through the process, helping you choose a system that's efficient, dependable, and suited to your home. After installation, we'll test it, make adjustments, and teach you how to maintain it for optimal performance.

Furnace Installation

A too-large furnace can short cycle, wasting energy and wearing out quicker, while a too-small one may not adequately heat your home. We precisely size and install your furnace to fit your home’s specs.

Furnace Maintenance

Getting your furnace checked annually, preferably before the cold weather sets in, is the most effective method to ensure it operates safely and at peak performance. Our furnace upkeep services encompass cleaning the burners, scrutinizing the heat exchanger, looking for potential gas leaks, and verifying all safety mechanisms are functioning correctly.

Furnace Repair

Odd sounds, poor ventilation, and chilly rooms that just won't heat up could all indicate that your furnace requires fixing. If your system is pumping out cold air or simply refuses to start, our HVAC experts are always ready to respond promptly to restore your heating.

Furnace Replacement

When your heating system is beyond repair or too costly to operate, furnace replacement is often the best option. We manage everything — from safely removing the old furnace and disposing of it, to expertly installing your new, energy-efficient system.

Indoor Air Quality Services in Coronado

Clean coastal air doesn’t always make it indoors. Dust, allergens, and humidity can impact your comfort and health. Our air quality solutions — from purifiers to dehumidifiers — help you breathe easier in every room. We serve all of Coronado, including homes near Centennial Park and Coronado High School.

Air Purifier Installation

Want fresher, healthier air in your home? Installing an air purifier is an excellent choice. We install whole-house air purifiers that trap dust, allergens, and airborne pollutants.

Air Purifier Repair

When your air purifier isn't working as it should, it might be time to consider air purifier repair. Whether it's a blocked filter or an electrical glitch, we diagnose and resolve issues quickly to bring back fresh air flow.

Dehumidifier Installation

If your house feels damp and musty due to high humidity, installing a dehumidifier can restore balance. We'll select and install the perfect system for your space.

Dehumidifier Repair

When your system isn't managing humidity effectively, it's time for a dehumidifier fix. We tackle problems such as leaks in the refrigerant, malfunctioning sensors, and issues with the drainage.

Duct Sealing

Ducts with leaks lead to bad air quality, unnecessary energy use, and increased costs. Our duct sealing solution identifies and repairs these leaks, ensuring fresh, temperature-controlled air circulates as it should.

Media Air Cleaner Installation

For homes with allergy worries, installing a media air cleaner can be beneficial. These devices, which we install, are excellent at trapping even the smallest particles.

UV Air Cleaner Installation

Installing a UV air cleaner provides a robust shield against airborne germs and allergens. We place these UV air cleaners inside your ducts, neutralizing bacteria, viruses, and mold, ensuring cleaner, safer air.

UV Light Installation

Prevent mold and bacteria in your HVAC system with a UV light installation. We install UV lights near your coils to sterilize the air as it passes, ensuring your system remains clean.

Home Safety & Comfort Controls in Coronado

Comfort goes beyond temperature — we help integrate smart safety and monitoring features into your home. We also install CO detectors, smart thermostats, and home monitoring solutions to enhance safety and convenience. Whether you're in the Cays or steps from the Ferry Landing, we make your home smarter and more secure.

CO Detector Installation

Setting up a CO detector keeps your home safe from the harmful effects of carbon monoxide. We put dependable detectors in crucial spots for round-the-clock monitoring.

Thermostat Installation

Proper thermostat installation can boost comfort and decrease energy use. We install smart or programmable thermostats to help you save money.

Thermostat Repair

If your house feels overly hot or extremely cold, a malfunctioning thermostat might be the issue. To address temperature and connectivity problems, consider calling for a thermostat repair.

Thermostat Replacement

Old or untrustworthy thermostats can lead to discomfort and high energy bills. We'll suggest and install a model for superior control and efficiency.

Solar Services in Coronado

Coronado’s sun is an opportunity — and Guthrie & Sons helps you make the most of it. We install solar panels, battery backups, and EV charging stations with precision and care. Solar helps cut your energy bills and reduce dependence on the grid — all while supporting long-term sustainability. Let’s make it easy.

Heat Pump Water Heater Services in Coronado

Our heat pump water heaters use ambient air to efficiently heat your water — cutting energy costs and reducing emissions. These systems are a perfect fit for Coronado homes looking to go green without sacrificing performance. Whether you live near the Yacht Club or inland, we’ll find the right fit.

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.

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.

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!

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