Ductless Mini Split Replacement

Ductless Mini Split Replacement in San Diego County That Restores Your Home’s Comfort and Efficiency

If your ductless system isn’t cooling or heating like it used to, there’s a good chance it’s time to replace it. Maybe it’s running non-stop, leaking, or costing too much to fix. At Guthrie & Sons, our team can remove your old unit and install a new one in no time. Call us today to discuss your ductless mini split replacement in San Diego—we make it easy to start fresh.

Replacing Your Mini Split? We Handle Every Detail

Once you’ve lived with a ductless mini split, it’s hard to imagine your home without one. The quiet operation. The zoned control. The lower energy bills. It just makes sense—until it stops working like it used to. No system lasts forever, and when it’s time for a ductless mini split replacement, you want the job done by people who know exactly what they’re doing.

Whether we installed your original system or not, Guthrie & Sons Heating, Air & Solar is the team San Diego trusts for HVAC work in the local area. We’re fully licensed, insured, and experienced in ductless mini split replacement services—from single-room setups to full multi-zone replacements. We’ll help you choose the best system for your home and budget, identify rebate opportunities, and install everything perfectly. We proudly serve all of San Diego County, Temecula, and Murrieta, and we’re here to make sure your new system delivers lasting comfort.

Ready to take the next step? Reach out to our team to discuss your ductless mini split replacement in San Diego, CA.

Mini Split Repair vs. Replacement

Mini Split Repair vs. Replacement

Sometimes it’s obvious—your unit won’t turn on, it’s making strange noises, or the room’s never the right temp. Other times, it’s less clear: maybe your bills are up, or the system’s working harder than it used to. If you’re unsure, our highly trained HVAC professionals will help you figure out the best option.

If a repair will get you more years of comfort, we’ll recommend it. If your ductless system is outdated, inefficient, or too costly to fix, we’ll guide you through a replacement.
We follow the $5,000 rule—if the repair cost times the system’s age is over $5K, it’s usually time to replace. Age, performance, and past repair history all play a role.

Our NATE-certified technicians are trained to diagnose, repair, and replace systems to the highest industry standards—so whatever your mini split needs, you’re in expert hands.

Free Online Ductless Mini Split Replacement Cost Calculator

Free Online Ductless Mini Split Replacement Cost Calculator

Just starting to look into the cost of a new wall-mounted cooling and heating unit? You’re not alone. We’re always happy to provide a free in-home quote, but we also know your time is valuable. That’s why we offer a quick, easy-to-use ductless system replacement cost calculator—so you can get a ballpark estimate without picking up the phone. It’s a helpful first step in comparing pricing and system types, whether you’re planning ahead or looking to move quickly.

We can also help you uncover rebates, tax credits, and incentives available here in San Diego.
And if you need financing, we’ve got flexible plans to make your ductless replacement more manageable upfront. Wherever you are in the process, we’re here to help you move forward with confidence.

Breaking Down the Best Ductless Mini Split Systems

Most ductless mini splits last 10 to 15 years—maybe even longer with proper maintenance. So if yours is on its way out, chances are the technology has changed quite a bit since your original install. Today’s systems are more efficient, quieter, and packed with smart features that make your life easier.

At Guthrie & Sons, we stay current on all the best options and help you choose the right ductless replacement for your San Diego area home.

Replacing your mini split isn’t just a swap—it’s a chance to get it right. Here are the key questions to ask so your new system fits your home, habits, and comfort needs.

Just because your old mini split was a certain size doesn’t mean the new one should be. Maybe you remodeled, closed off a space, or added insulation over the years. We’ll take fresh measurements, look at how you actually use each room, and make sure your ductless mini split replacement matches your home’s current needs, not old blueprints.

If your old system was installed 10+ years ago, it probably has a SEER rating (Seasonal Energy Efficiency Ratio) in the 13–15 range. Today’s ductless units can reach SEER 20+—which means they cool better using less electricity. We’ll help you choose a unit that keeps your home comfortable without overworking or overcharging you.

Even in San Diego, chilly mornings happen, and if your old unit struggled to keep up, that matters. HSPF (Heating Seasonal Performance Factor) ratings show how efficiently your system heats, and newer systems do it far better than older models. If your current setup left cold spots or took forever to warm up, we’ll fix that with the right replacement.

Still using an older ductless air conditioner with no heat function? Now’s a great time to switch to a system that does both—cooling in the summer, heating in the winter. A ductless heat pump installation gives you more flexibility and lets you ditch your furnace for good.

Older ductless systems usually had one job: to cool the space. Today’s replacements offer much more: Wi-Fi thermostats, smart remote controls, motion sensors, sleep modes, and ultra-quiet operation. If your last unit was basic, we’ll walk you through what’s available now so your new system does more than just the bare minimum.

Replacing a ductless unit isn’t a plug-and-play job—it takes electrical work, refrigerant handling, and real expertise. DIY mini split installs often lead to performance issues, leaks, or voided warranties. At Guthrie & Sons, we’re licensed, insured, and certified to handle your San Diego ductless mini split replacement.

Keep Your New Mini Split Running Like New With Year-Round Care

As your mini split gets older, it’s normal for it to need a little more attention, especially with San Diego’s salty air, heat waves, and year-round use. Even the best systems can develop hiccups: a sensor goes out, performance dips, or it just stops cooling like it used to. When that happens, call us for your mini split repairs.

But the best way to avoid breakdowns? Routine maintenance. We offer professional mini split tune-ups that keep your system efficient, quiet, and reliable. We’ll check refrigerant levels, clean components, test performance, and catch small issues before they turn into costly repairs.

Want the easiest way to stay ahead of problems? Join our USA Membership Plan. You’ll get scheduled tune-ups, priority service, repair discounts, and peace of mind all year long. It’s affordable, stress-free, and helps you protect the investment you just made. Because a well-maintained system doesn’t just last longer—it works better, too.

Frequently Asked Questions

Yes—in most cases, indoor and outdoor units are designed to work as a matched pair. Mixing old and new components can reduce performance and void the manufacturer’s warranty. We always recommend replacing both for long-term efficiency and reliability.

Sometimes, but it depends on their condition, size, and compatibility with the new system. We’ll inspect everything during your estimate to see what can safely be reused. If anything needs replacing, we’ll walk you through it clearly—no surprises.

Costs vary based on system size, number of zones, features, and installation complexity. We’ll provide a custom quote and help you explore financing, rebates, and incentives.

Most replacements take just one day, sometimes even just a few hours. If multiple units or extra upgrades are involved, it might take a bit longer. Either way, we work clean, fast, and keep you informed every step of the way.

Heating and Cooling Offers You Can't Miss

Big savings, same great service. See what offers are available now in Carlsbad for our favorite customers.

$2,600 Federal Tax Credit on Heat Pump Water Heater

Valid on a qualifying heat pump water heater installation with electrical panel upgrade. Up to $2,000 (30% of cost) in Federal Tax Credits for a heat pump water heater and up to $600 (30% of cost) for an electrical panel upgrade. Can be combined with state rebates only. Restrictions apply. See dealer for details.

Up to $11,750 Off a New System*

Qualify for HEEHRA and you can get up to $8,000 in HEEHRA rebates, up to $1,150 in manufacturer rebates and up to $2,600 in Federal Tax Credits for a total of up to $11,750 off a new installation. Valid on residential properties only. Cannot combine with any other offers. Must mention promo at time of estimate appointment. Restrictions apply. See dealer for details. Offer valid until funds last.

Free Diagnostic w/ a Repair

Your diagnostic service call fee will be waived if you proceed with a repair. Cannot combine with other offers. Restrictions apply. See dealer for details. Offer expires 6/30/25.

0% APR for 25 Months

Get 0% APR financing for 25 months on a new heating or air conditioning installation. 0% interest with 25 equal monthly payments. Financing subject to credit approval. Valid on residential properties only. Cannot combine with other offers. Must mention promo at time of estimate appointment. Restrictions apply. See dealer for details. Offer valid for an estimate appointment scheduled before 6/30/25.

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.

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 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.

Request a Quote for Your Ductless Mini Split Replacement in San Diego

We’re Guthrie & Sons Heating, Air & Solar—family-owned, locally based, and proud to serve San Diego homes and businesses since 2005. We know this climate, these neighborhoods, and what it takes to keep your house feeling just right. You won’t get a pushy sales pitch or generic recommendations—just clear answers from a team that treats you like family.

Whether you’re replacing one indoor unit or upgrading a full ductless setup, we’ll guide you through your options, help you find the right system, and make sure it’s installed the right way.
We’re licensed, insured, and experienced with all major ductless brands, so you can feel confident in the work from day one.

Give us a call or fill out the form to request your free quote for a ductless mini split replacement in San Diego, California.

8248 Ronson Road
San Diego, CA 92111
(619) 269-3013