$77 AC Tune Up Special

Keep your system running right.

A professional AC tune up designed to improve performance, efficiency, and reliability. Ideal for homeowners who want peace of mind before problems start. Call for details*

New AC Systems with 0% Interest for 24 Months

Upgrade your comfort today and pay over time.

Install a new energy-efficient AC system and enjoy 24 months of 0% interest financing. Every installation is backed by the Arnold's Zero Worry Guarantee. Call for details. Qualified buyers only*

$88 Service Call Special

Fast answers when your AC is not working .

Expert diagnostics with no surprise pricing. If the same repair issue returns, we will come back, perform a second repair at no charge, and refund the original repair. Call for details*

Up To $1200 In Daikin Rebates

Premium comfort with added savings.

Upgrade to a Daikin system and take advantage of limited rebate offers. Every system is backed by the Arnolds Zero Worry Guarantee. Call for details*

Air Conditioning Repair, Installation & Maintenance in Stuart, FL and Across the Treasure Coast

Proudly serving Martin, St. Lucie, Indian River & Palm Beach Counties for over 30 years. Locally owned, trusted, and committed to same-day service with no overtime fees.

When the Florida heat kicks in, homeowners and businesses across the Treasure Coast turn to Arnold’s Air Conditioning. Based in Stuart, FL, our locally owned company has been providing trusted AC repair, installation, and maintenance for more than 30 years. As a Daikin Comfort Pro Specialist, we offer access to advanced, energy-efficient systems backed by industry-leading warranties and expert factory-certified support. Our technicians are experienced with all major brands—including Trane, Lennox, Goodman, Rheem, Carrier, and Bryant—so whether you need a fast repair or a full system upgrade, you can count on Arnold’s for honest service, same-day availability, and no overtime fees.

Air Conditioning Replacement

If your old system can’t keep up, Arnold’s offers professional AC replacement services throughout Stuart and the Treasure Coast. We install high-efficiency units from trusted brands, helping lower energy costs and improve comfort. As a Daikin Comfort Pro Specialist, we back every installation with factory-certified support and extended warranties for long-lasting peace of mind.

Air Conditioning Repair

When your AC stops cooling, Arnold’s delivers fast and affordable AC repair in Stuart, FL and across the Treasure Coast. Our expert technicians service all major brands—including Daikin, Trane, Rheem, and Carrier—to get your system running again the same day. With no overtime fees and over 30 years of experience, we’re the AC company homeowners trust.

AC Maintenance Plans

Protect your investment with regular AC maintenance from Arnold’s. Based in Stuart, FL, we provide tune-ups across Martin, St. Lucie, Indian River, and Palm Beach Counties to prevent costly breakdowns and extend system life. Our affordable maintenance plans improve energy efficiency and include priority scheduling for worry-free comfort year-round.

Ductwork Installation

Proper ductwork is essential for efficient cooling. Arnold’s designs and installs custom duct systems for homes and businesses across the Treasure Coast. With over 30 years of experience in Stuart, FL, we ensure your ducts are built to last, sealed tight, and optimized for airflow—maximizing the performance of your AC system.

Ductless Systems

Arnold’s installs and services ductless mini-split systems in Stuart and throughout the Treasure Coast. Perfect for older homes, room additions, or spaces without ducts, these systems provide quiet, energy-efficient comfort with zoned temperature control. Our team handles everything from installation to ongoing maintenance for long-term performance you can count on.

Residential and Commercial Services

Serving homeowners and businesses alike, Arnold’s offers comprehensive HVAC solutions across Martin, St. Lucie, Indian River, and Palm Beach Counties. From same-day residential AC repair to large-scale commercial installations, our experienced team delivers dependable results. With no overtime fees and trusted local service, we keep Treasure Coast families and businesses comfortable year-round.

Book an Appointment Online or by Phone

Receive Service Today!

An AC Company that Serves the Beautiful Treasure Coast of Florida

Arnold’s Air Conditioning proudly serves the entire Treasure Coast of Florida, delivering reliable comfort solutions to a diverse and vibrant region. From Martin and St. Lucie to Indian River and Palm Beach counties, our commitment to excellence never wavers. To explore all the neighborhoods and cities we cover, visit our dedicated Service Areas page for a complete overview of where we provide trusted air conditioning services.

St. Lucie County

From St. Lucie West and Tradition to Fort Pierce, Arnold’s Air Conditioning provides trusted AC repair, installation, and maintenance services across St. Lucie County. Our locally owned team offers same-day appointments, no overtime fees, and expertise on all major HVAC brands—keeping Treasure Coast families comfortable for over 30 years.

Martin County

Based in Stuart, Arnold’s is proud to serve all of Martin County, including Palm City, Jensen Beach, and Hobe Sound. Whether you need AC repair, ductwork installation, or a new Daikin system, our technicians deliver prompt, reliable service backed by decades of experience and strong local roots.

Palm Beach County

From Jupiter to Palm Beach Gardens, Arnold’s Air Conditioning helps homeowners and businesses stay cool year-round. We specialize in AC repair, installation, and maintenance throughout Palm Beach County, offering factory-certified Daikin Comfort Pro expertise, energy-efficient upgrades, and personalized service you can count on.

Request an Appointment Online or Call Us

Call Today, Cool Today!

High-Quality Customer Service

At Arnold’s Air Conditioning, we pride ourselves on providing our customers with the best possible service. We are committed to:

Arriving on time for appointments.
Providing clear and concise communication.
Working efficiently and professionally.
Standing behind our work with a 100% satisfaction guarantee.
Most importantly, providing service the day of your inquiry

HVAC Specials & Financing Options on the Treasure Coast

AC Tune Up Deals

$77 AC Cleaning Special

Get a thorough AC system cleaning—inside and out—with our $77 tune-up special, including a 23-point inspection for peak performance.

Daikin Rebate

$1,200 Instant Rebate

Get a $1,200 instant rebate on a new Daikin system—plus enjoy peace of mind with a 12-year parts and labor warranty.

Service Call Specials

$88 Service Call

Available Monday through Saturday, which covers expert diagnostics and professional service at one flat rate with absolutely no overtime charges.

New AC System Deal

24 Months of 0% Interest

Upgrade your home’s comfort with a brand-new, energy-efficient AC system. Enjoy 24 months of 0% interest financing on qualifying systems backed by Arnold’s Zero Worry Guarantee. Qualified buyers only*

What Our Customers Say

With thousands of satisfied homeowners and businesses across Stuart and the Treasure Coast, Arnold’s Air Conditioning is proud to be one of Florida’s most trusted HVAC companies. Here are just a few of the reviews that reflect our commitment to reliable service, honest pricing, and lasting comfort:

      EXCELLENT  
   Based on 568 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Mark LeRose 
 
 
 
 Trustindex verifies that the original source of the review is Google. Installed a new a/c unit. A beautiful job, very nice installers and a great company! System works beautifully!!
  
 
      Posted on Google  
   
   Joanne Rice 
 
 
 
 Trustindex verifies that the original source of the review is Google. Always the best service. So nice to know I don't have to worry about my air conditioning unit as long as I have Arnold's!
  
 
      Posted on Google  
   
   Richard Sukiennik 
 
 
 
 Trustindex verifies that the original source of the review is Google. Everything was great
  
 
      Posted on Google  
   
   Juliano Degrassi 
 
 
 
 Trustindex verifies that the original source of the review is Google. Very competent and informative serviceman
  
 
      Posted on Google  
   
   David Basnett 
 
 
 
 Trustindex verifies that the original source of the review is Google. Knowledgeable, listened,  explained,  comprehensive,  cared.
  
 
      Posted on Google  
   
   cleaster99 
 
 
 
 Trustindex verifies that the original source of the review is Google. Arnold’s delivered on their service of my Mini-Split AC unit for my garage.  From inception of the quote to the installation, my experience was excellent!  I highly recommend Arnold’s for all you AC needs.
  
 
      Posted on Google  
   
   Bill Jankowski 
 
 
 
 Trustindex verifies that the original source of the review is Google. Very efficient, Sergio knows his stuff.
  
 
      Posted on Google  
   
   Ian Skidmore 
 
 
 
 Trustindex verifies that the original source of the review is Google. Unbelievable service! Extremely detailed explanation concerning our A/C unit.  Christopher found problems with our A/C and let us know that we can still file a warranty claim. He also gave us great advice on how to maintain our A/C to save us money. I trust Arnold’s. Great customer service!
  
 
      Posted on Google  
   
   Christine King 
 
 
 
 Trustindex verifies that the original source of the review is Google. He was efficient and pleasant. I believe the company should have included the original fee into the repair price but that is not the technician.

"Arnold’s Air Conditioning came out the same day when our AC stopped working in the middle of July. The technician was polite, professional, and explained everything clearly. We had cool air blowing again in no time. Truly the best AC repair company in Stuart, FL!"

"We replaced our old system with a new Daikin unit through Arnold’s and couldn’t be happier. The installation was quick, the price was fair, and the crew left everything spotless. If you need a reliable AC company on the Treasure Coast, this is it."

"Arnold’s has been maintaining our AC for years and they always deliver top-notch service. Honest advice, 24/7 availability, and friendly techs. I recommend them to anyone in Martin or Palm Beach County who needs dependable air conditioning service."

Contact Us

Contact Arnold’s Air Conditioning today for a free quote on your air conditioning needs.

We’ll be happy to help you keep your home or business cool and comfortable all year round.