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.

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 Company2. Family Owned3. Great presentation, no pressure4. Good products5. Competitive pricingJust 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.

Michael Myers

00:19 25 Mar 25

My experience with Guthrie & Sons has been excellent, and I am pleased to write a very favorable review about it. They replaced three air conditioners and three propane furnaces with new equipment that utilizes heat pump technology. I had met with other companies and I was close to coming to a conclusion, when a friend recommended Guthrie & Sons. He told me that they are hyper focused on customer service from beginning to end.Their customer service started with the on line completion of a basic information form. Shortly after submitting that form, I heard from Zach who scheduled an appointment at my home.I had already met with three other HVAC contractors, and for that reason, I had some basic information about the systems available and how heat pumps work and whether propane furnaces should also be installed. I signed a contract on a Friday. By Wednesday of the next week they had completed the installation. Wow.The installation of one of the furnaces in the attic caused minor damage to the drywall. THEY BROUGHT IT TO MY ATTENTION and told me a drywall contractor would be in touch regarding its repair. Two days later it was repaired.Since installation, the equipment (heat pumps from Bosch) has been working great and I am optimistic about the future. Meanwhile, their pricing, warranty and terms are far superior to their competitors.Since this is an unusually long review and so favorable, let me add this: This is my honest, uncompensated opinion. I have no relationship with anyone at Guthrie & Sons other than the contract we executed.

Tom H

15:21 20 Mar 25

We recently had Guthrie and Sons install a Mini-Split system in our home. The entire process was handled professionally with no issues occurring at any time. The estimator (Vlad) went through options with us but let us evaluate the best solution for us with zero pressure. The installation team (Matthew and Aaron) showed up on time, reviewed the scope of the job, made sure they understood what we wanted, and then proceeded to complete the installation exactly as discussed. They asked for my input as needed so there were no surprises when the job was completed.They respected my property and made sure everything was left at least as clean was when they arrived. The job was completed on time and as promised and they reviewed the details of the system and its use clearly. I would definitely have Guthrie and Sons do other electrical/HVAC work should the need arise.

Mike Macias

19:43 19 Mar 25

I have been in the construction industry in San Diego for over 50 years. I owned my own contracting company for over 40 years. I have seen all levels of customer service in my years. The level of customer service from Guthrie and Son’s is among the best I’ve ever seen and received. Every time I hear anyone asking for a referral for HVAC work I immediately give them your number. When I recommend a company I in essence am putting my name and reputation on the line. I refer them with 100% confidence in the service they will receive. Thank you very much for your legendary service.

Scott Sypkens

23:32 11 Mar 25

We first hired Guthrie and Sons to replace a furnace after comparing proposals from several heating and air companies. They’ve since been back for annual check ups, and today Kareen came to diagnose and resolve an issue with our mini-splits. My experience each time, including today, is that they hire friendly, knowledgeable people who do good work. They’ve never tried to upsell or do anything unnecessary, which is the way it should be. I’d recommend them to anyone who asks.

Marilyn Rivas

20:07 09 Mar 25

They always come out quickly. They are so polite and careful.

Steven Wheeler

19:28 07 Mar 25

Good technician did everything right yet our heater still not workingJonathan gave us the likeliest problems so we’ll have to get it fixed

Dmitriy

04:01 07 Mar 25

My AC was not working for seven months. Three other companies tried to fix it with no success. Don’t make the same mistake I did—go straight to Guthrie & Sons! They are absolutely worth every penny.

Cecilia Benevich

22:17 05 Mar 25

Rick

21:38 05 Mar 25

Experienced technician gave me the particulars of a replacement HVAC system

Daylan Dauchot

21:28 05 Mar 25

Courteous, in-time, helpful, honest. Would recommend.

Xinxin Wang

22:05 04 Mar 25

Tom Barden

18:26 04 Mar 25

Adair Cooke

19:02 03 Mar 25

Jonathon is a great technician. He is very willing to answer any questions and explains things very well. He is very transparent with letting us know cost, finance options, different furnace models and anything else we want to know. I would highly recommend him to anyone looking for furnace repair or replacement.

Bratso Krsic

00:29 28 Feb 25

Guthrie and Sons took on the challenging project of installing an HVAC system at St. George's Serbian Orthodox Church of San Diego, CA. They were the only company among the six we consulted that saw the project through to the end. The members of our congregation are not just happy, but thoroughly satisfied with the heating and air conditioning. The system, split units/floor units with condensers outside, was installed with minimal intrusion onto the church's artwork. Despite the project taking longer than expected due to permit delays, the results were well worth the wait. We highly recommend Guthrie and Sons Heating and Air.

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