AC Repair
When your cooling breaks down in the middle of a Florida summer, you need fast, professional diagnostics. We repair all major central AC, heat pump, and mini-split brands with transparent pricing.
Jacksonville, FL · Locally Owned
Honest HVAC repair.
Fair flat rates.
Always cool.
Jax HVAC Co provides straightforward heating and air conditioning repair, maintenance, and installation. No high-pressure sales, no hidden fees, and NATE-certified quality.
- Locally Owned & Stationed
- NATE-Certified Technicians
- Same-Day AC Dispatch
- Flat-Rate Diagnostics ($99)
Why we are different
No commissions, no sales pressure, just honest HVAC.
Most Jacksonville HVAC companies pay their technicians on sales commissions. That leads to high-pressure recommendations for complete system replacements when a simple repair would suffice.
At Jax HVAC Co, we connect you with flat-rate specialists. Partnered technicians are evaluated on fixing your system, not selling replacements. You receive a clear written quote with options, so you stay in control.
$99 Diagnostic Fee
Flat-rate trip and troubleshooting fee, applied directly to the cost of repair if work is completed.
100% Insured
Partnered contractors meet all Florida safety, insurance, and building code guidelines.
OEM Replacement
Partnered technicians use original manufacturer parts to ensure maximum safety and durability.
Local Focus
Stationed locally, meaning we respond quickly to neighborhood emergencies.
What we do
Our core HVAC services. Straightforward and professional.
Learn more →
AC Installation
Upgrading your old, inefficient air conditioner can cut your energy bills in half. We design and install modern, high-SEER2 central AC systems, heat pumps, and ductless mini-splits tailored to your home's size.
AC Maintenance
Routine maintenance keeps your HVAC system running smoothly, prevents sudden summer breakdowns, and satisfies manufacturer warranty terms. Our detailed multi-point inspection covers every component.
Heating Service
Jacksonville winters can drop below freezing. Whether your heat pump isn't reversing, your furnace won't ignite, or you smell dust burning, our technicians diagnose and resolve heating issues quickly.
Duct & Air Quality
Leaky ductwork loses up to 30% of your conditioned air to the attic. We seal ducts, clean registers, and install high-quality air filtration systems, UV lights, and air scrubbers to keep your home's air clean.
Emergency Repair
AC loss in a Florida summer isn't just uncomfortable; it can be dangerous for seniors, infants, and pets. Our emergency dispatch team is ready to respond 24 hours a day, 7 days a week.
Mini-Split AC
Ductless mini-splits offer quiet, high-efficiency heating and cooling without the ductwork. Ideal for sunrooms, guest suites, home offices, and custom zoning.
Duct Sealing
Leaky, torn, or uninsulated ducts make your AC work twice as hard and pull attic fiberglass dust into your home. We seal and insulate ducts to lower your electric bills.
Air Purification
We install whole-house media filters, active air scrubbers, and UV germicidal lamps inside your air handler to actively destroy biological growth and trap dust.
Heat Pumps
Heat pumps are highly efficient systems that reverse cycle to cool your home in the summer and warm it in the winter. We repair and install all major heat pump brands.
Furnace Repair
Gas furnaces require precision diagnostics to ensure safe gas ignition and prevent carbon monoxide leaks. We service burners, flame sensors, and heat exchangers.
Simple Process
How we restore your comfort.
We respect your time. Our diagnostic visits are scheduled within narrow windows, we call you 30 minutes before arrival, and our trucks carry full replacement stocks to ensure repairs can happen immediately.
01
Schedule in 60 seconds
Call us or request a diagnosis online. We schedule a convenient appointment window with a local specialist, often same-day.
02
Thorough Diagnostic Visit
An EPA-licensed technician inspects your system and presents a clear, flat-rate quote before starting repairs.
03
Immediate Repair & Cool Air
Pre-stocked service trucks carry universal replacement parts, allowing technicians to fix most breakdowns on the spot.
Our Workflow
The 5-Phase NATE Diagnostic Standard
Our partnered contractors are held to the highest standards. Here is how partnered technicians verify, diagnose, and repair your heating and cooling systems during a flat-rate visit.
01
Arrival & Staging
Technicians park in designated areas, wear protective shoe booties, and clear a 3-foot safety perimeter around your indoor and outdoor HVAC equipment.
02
Electrical Testing
Using high-precision multimeters, technicians measure starting and running amperages on the compressor, test contactor contacts, and check capacitor capacitance splits.
03
Refrigerant & Airflow
They verify charge levels using digital manifold gauges and check airflow splits across the evaporator coil to verify there is no restricted coil flow or static pressure drag.
04
Upfront Quote & Fix
Before turning a wrench, technicians lay out all diagnostic options with clear flat rates. Upon your approval, they replace failed components using universal parts from partnered service vehicles.
05
Validation Check
Technicians re-test the system, measure the supply-return temperature split, clear the condensate lines with tablets, and verify the carbon monoxide levels are at a safe 0 ppm.
Field Reports
Recent Field Logs & Project Studies
See what our NATE-certified technicians have been working on in neighborhoods across Jacksonville.
GasJuly 2026
Gas Furnace Flame Sensor Restoration & Burner Clean on San Jose Blvd in Mandarin
San Jose Blvd, Mandarin
Property Type: suburban family house
The Problem: Gas furnace burner ignited but shut down after 3 seconds, cycling repeatedly and failing to heat.
Diagnostic Assessment: The system threw a flame signal failure code. Flame sensor was coated in carbon build-up.
Resolution: Scrubbed the flame sensor rod with a micro-abrasive pad, vacuumed rust soot from burner jets, and adjusted gas pressure.
Flame3.5 µA (Healthy)
Ignition100% Stable
SafetyCO checked: 0ppm
HeatJuly 2026
Heat Pump Reversing Valve Welded Replacement on Loretto Rd in Mandarin
Loretto Rd, Mandarin
Property Type: sprawling brick ranch home
The Problem: Heat pump would cycle but was stuck in cooling mode during winter heat call.
Diagnostic Assessment: Verified 24V signal to reversing valve solenoid, but the slide inside the valve body was mechanically locked.
Resolution: Recovered refrigerant charge, cut out the failed reversing valve, and welded a new OEM reversing valve while purging nitrogen.
CycleRestored
RechargeBalanced subcool
Vacuum320 Microns
Whole-HomeJuly 2026
Germicidal UV Light & 4-Inch Media Filter Retrofit on Mandarin Rd in Mandarin
Mandarin Rd, Mandarin
Property Type: riverfront estate with heavy oak cover
The Problem: Household suffered from severe seasonal allergies and musty odors from the indoor AC closet.
Diagnostic Assessment: Trace organic build-up detected on the evaporator coils. Standard filter cabinet was restricted to 1-inch thickness.
Resolution: Sanitized the coils and installed a 24V germicidal UV-C bulb over the coil. Retrofitted return duct to fit a 4-inch media filter cabinet.
Allergen97% Capture
MustyEliminated
Filter6 Months
Service area
Jacksonville, neighborhood by neighborhood.
We cover Duval, Clay, and St. Johns counties. Click your neighborhood to see specific HVAC services, property configurations, and dynamic local details.
Testimonial
“Our AC stopped cooling on a Sunday afternoon. Jax HVAC Co had a technician at our house in Mandarin within two hours. He fixed the burnt contactor on the spot, charged us a flat diagnostic fee plus parts, and had us cool before dinner. No upsells.”
— The Davis Family, Mandarin
Real customer feedback collected from local diagnostic calls.
Request Quote
Ready to book?
Fill out our quick diagnostic request form below. We will contact you immediately to schedule a flat-rate Diagnostic appointment ($99).
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FAQ
HVAC Questions Answered
- How much does an HVAC replacement cost in Jacksonville?
- AC replacements vary based on tonnage, SEER2 efficiency rating, and custom duct needs. In Jacksonville, residential installations typically range from $5,500 to $9,500. We provide full written load calculations and flat-rate system quotes with no hidden surprises.
- How often should I change my home's return filter?
- For standard 1-inch pleated filters, we recommend replacing them every 30 to 60 days. In Florida, heavy AC usage during the summer can accumulate dust and pet dander rapidly. A clogged filter blocks air volume, causing evaporator coils to freeze.