Solar and HVAC Services in El Cajon, 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 El Cajon.

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!

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

In El Cajon, the plentiful sunshine often brings comfort. But when summer highs hit or chilly evenings roll in, Guthrie & Sons is here to keep your space just right. We offer complete residential and commercial HVAC services in El Cajon, California.

From installing AC in new builds or historic homes near Main Street to fine-tuning your heating system, we're your trusted partner for installation, repair, maintenance, and replacements. Considering cleaner air or going solar? We provide indoor air quality and solar services, 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 El Cajon 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 El Cajon, 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

Guthrie & Sons specializes in air conditioning installation for new homes and properties without existing systems. We design custom solutions that ensure efficient, powerful cooling. From choosing your unit to installing ductwork, we handle it all.

Air Conditioning Maintenance

Avoid costly breakdowns with regular air conditioning maintenance in El Cajon. Our expert tune-ups help your system run efficiently and extend its lifespan.

Air Conditioning Repair

If your AC is blowing warm air, making noises, or not turning on, it's time for professional air conditioning repair in El Cajon. We use advanced tools and experience to diagnose and fix the problem fast.

Air Conditioning Replacement

Is your air conditioner over 10 years old or breaking down frequently? Consider air conditioning replacement in El Cajon. We’ll help you choose a high-efficiency unit that keeps you cooler while saving on energy bills.

Mini Split Services in El Cajon

Get zoned comfort and energy efficiency with a ductless mini split in your El Cajon home. Ideal for spaces like garage conversions or guest rooms, mini splits offer flexible climate control. Guthrie & Sons provides expert mini split services in El Cajon, including installation, maintenance, repair, and replacement.

Mini Split Installation

Perfect for sunrooms, additions, or spaces without ducts, ductless mini splits are a smart solution. We install systems designed to meet your specific needs.

Mini Split Maintenance

With El Cajon’s dry heat and everyday use, your system needs attention. Our maintenance includes filter cleaning, refrigerant checks, and electrical inspections.

Mini Split Repair

If your mini split isn’t cooling or heating properly, shows error codes, or runs irregularly, we’ll pinpoint the issue and restore function fast.

Mini Split Replacement

When your system can't keep up or drives up power bills, it might be time for a ductless mini split replacement. We’ll assess your current unit and recommend an efficient new model.

Heat Pump Installation

Heat pumps are ideal for El Cajon's mild climate. We assess your home’s layout and energy needs to recommend the best system.

Heat Pump Maintenance

Your heat pump runs all year, so regular maintenance is essential. Our tune-ups include coil cleaning, refrigerant checks, and performance testing.

Heat Pump Repair

Low airflow, temperature issues, or strange noises? We’ll quickly diagnose and fix heat pump problems like leaks or electrical faults.

Heat Pump Replacement

When repairs aren’t enough, a heat pump replacement can lower your bills and improve comfort. We install efficient systems with long-term savings in mind.

HVAC Installation

Choosing a new HVAC system means more than picking a model. We evaluate your home’s size, layout, and ventilation needs to recommend the right fit.

HVAC Maintenance

Skipping HVAC maintenance can lead to major issues. We follow strict guidelines to catch problems early and keep your system efficient.

HVAC Repair

Hot spots, cold rooms, or odd noises? Your system might need attention. We respond quickly to identify and fix HVAC issues.

HVAC Replacement

If your system is unreliable or driving up costs, it might be time for a replacement. We install new systems efficiently and show you how to get the most from them.

Heating Installation

Need a new heating system? We help you choose and install the right furnace, heat pump, or mini split for long-term performance.

Heating Maintenance

Your heating system needs more than filter changes. We clean, inspect, and adjust every part to prevent breakdowns and improve efficiency.

Heating Repair

If your heater blows cold air or makes strange noises, we’ll find the problem and fix it fast. No pressure—just reliable repairs.

Heating Replacement

Is your old heater beyond repair? We help you choose a new, efficient model and handle installation, testing, and setup.

Furnace Installation

An oversized furnace wastes energy. A small one struggles to heat your home. We size and install your furnace precisely for your needs.

Furnace Maintenance

Schedule yearly furnace maintenance before winter hits. We clean burners, inspect for gas leaks, and test all safety systems.

Furnace Repair

If your furnace is noisy, not heating well, or pushing cold air, our repair team will fix it quickly so you can stay warm.

Furnace Replacement

When your furnace is outdated or costly to run, replacing it with a new unit saves money and improves comfort. We remove the old unit and install your new one correctly.

Air Purifier Installation

Improve your indoor air with a whole-home air purifier. These systems trap dust, allergens, and harmful particles.

Air Purifier Repair

If your purifier isn’t working well, it could need maintenance. We fix blocked filters, electrical issues, and more.

Dehumidifier Installation

Is your home too humid? We install dehumidifiers that restore balance and prevent moisture issues.

Dehumidifier Repair

If your system isn’t reducing humidity, we troubleshoot and fix problems like refrigerant leaks or drainage failures.

Duct Sealing

Leaky ducts waste energy and reduce air quality. Our duct sealing service finds and fixes leaks to deliver clean, conditioned air.

Media Air Cleaner Installation

For allergy concerns, media air cleaners are highly effective. We install units that trap even microscopic particles.

UV Air Cleaner Installation

Install a UV air cleaner to fight airborne bacteria, mold, and viruses. We mount them inside your ductwork for clean, healthy air.

UV Light Installation

Prevent mold and bacteria growth in your HVAC coils with UV lights. We place them near coils to keep your air system clean.

Home Safety & Comfort Controls in El Cajon

In El Cajon, keeping your home running right means more than staying warm or cool — it means dependable control and built-in protection. When those systems fail or go outdated, it can create frustration fast.

Our safety and control services in El Cajon help your home stay efficient, comfortable, and ready for anything.

CO Detector Installation

Keep your home safe with a carbon monoxide detector. We install dependable units in key locations.

Thermostat Installation

A properly installed thermostat improves comfort and energy savings. We set up smart or programmable models tailored to your needs.

Thermostat Repair

Is your home too hot or cold? A faulty thermostat may be to blame. We fix connection and temperature issues quickly.

Thermostat Replacement

Outdated thermostats cause discomfort and high bills. We’ll recommend and install a more efficient model.

Solar Services in El Cajon

Tap into El Cajon's abundant sunshine with Guthrie & Sons' expert solar services. Our solar panel systems, battery backups, and EV chargers reduce energy bills and reliance on the grid. Choose clean energy and shield yourself from rising utility rates. We’ll support you through every step of your solar journey in El Cajon.

Heat Pump Water Heater Services in El Cajon

Guthrie & Sons installs energy-efficient heat pump water heaters in El Cajon. These systems use ambient air to heat water, cutting your energy use and carbon footprint. Enjoy reliable hot water, lower bills, and a greener home, backed by our expert installation and support.

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.

Jim Hainline

3 weeks ago

We had Rob from Guthrie & Sons come out to repair one of our A/C units. Rob was very friendly and professional. Rob resolved the problem quickly.
As far as price goes, I paid a higher flat fee 12 years ago from one of the larger local companies. I'm very impressed with pricing and quality of work.

I highly recommend Guthrie & Sons and Rob.

Amy Graeber

3 weeks ago

Great experience! The company confirmed my appointment and let me know who my technician was via text. They also updated me when he was on his way. The technician was friendly and knowledgeable. I’d recommend Guthrie & Sons to friends and family.

Bobby Orozco

3 months ago

Great experience working with Guthrie & Sons from start to finish. Vlad was awesome. He was incredibly knowledgeable and explained everything in detail. Stark contrast from other companies we received bids for.

Christian and his crew did a great job on the install everything was smooth from start to finish.

I would definitely recommend this company here in Murrieta.

Sharon Troeger

3 months ago

Guthrie & Sons has always been super professional and knowledgeable about our system. They did the install a few years ago and have continued to maintain it for us. This year we noticed that our system wasn't performing as well, so when Wayne came out, he noticed a likely leak and was back 2 days later to find and fix it. He was quick, professional, and just extremely nice! 100% recommend.

Jeff Haight

4 months ago

Called one of the "big guys" in town and the estimate to do what needed to be done to diagnose my problem was nearly 1/2 the cost of the system when I purchased it and had it installed 5.5 years ago, I found Guthrie & Sons and they came out the same day and did the same work for 1/4 the price I was quoted for the same exact work! Daniel was friendly, honest and quickly got my system working as expected. I even purchased the service plan so I don't have future problems. I highly recommend these guys, they were awesome, don't get ripped off call Guthrie & Sons!!!

Rocky

4 months ago

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

5 months ago

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

5 months ago

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

5 months ago

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

5 months ago

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

6 months ago

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

6 months ago

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

6 months ago

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

6 months ago

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

7 months ago

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

7 months ago

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

7 months ago

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

8 months ago

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

8 months ago

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

8 months ago

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.

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

Solar and HVAC Services in El Cajon, CA

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

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

The Guthrie Way

Service Backed by Integrity, Experience, and Family Values

5-Star Service

Honest Pricing

Expert Technicians

Family Values

No Upsells

Protect Your Home and Wallet With Our USA Membership Plan

Budget Concerns? We Offer Flexible Financing for Your Comfort Needs

Heating and Cooling Services in El Cajon, CA

Air Conditioning Services in El Cajon

Air Conditioning Installation

Air Conditioning Maintenance

Air Conditioning Repair

Air Conditioning Replacement

Mini Split Services in El Cajon

Mini Split Installation

Mini Split Maintenance

Mini Split Repair

Mini Split Replacement

Heat Pump Services in El Cajon

Heat Pump Installation

Heat Pump Maintenance

Heat Pump Repair

Heat Pump Replacement

HVAC Services in El Cajon

HVAC Installation

HVAC Maintenance

HVAC Repair

HVAC Replacement

Heating Services

Heating Installation

Heating Maintenance

Heating Repair

Heating Replacement

Furnace Services in El Cajon

Furnace Installation

Furnace Maintenance

Furnace Repair

Furnace Replacement

Indoor Air Quality Services in El Cajon

Air Purifier Installation

Air Purifier Repair

Dehumidifier Installation

Dehumidifier Repair

Duct Sealing

Media Air Cleaner Installation

UV Air Cleaner Installation

UV Light Installation

Home Safety & Comfort Controls in El Cajon

CO Detector Installation

Thermostat Installation

Thermostat Repair

Thermostat Replacement

Solar Services in El Cajon

Heat Pump Water Heater Services in El Cajon

Frequently Asked Questions

Do you offer free estimates on your services?

Are your technicians background-checked?

How soon can I schedule service?

Do you take care of permits for new installations?

Real Reviews From Real Customers

Schedule Service With Guthrie & Sons Today