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.

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