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Hvac in St. Augustine for Coastal Homes and Historic Buildings
When your air conditioning quits in St. Augustine, the heat and humidity do not wait. We run hvac in St. Augustine seven days a week, from the Historic District to Anastasia Island and out to Vilano Beach. Our techs carry manifold gauges, leak detectors, and recovery machines on every truck, so most repairs finish in one visit. We have served this coast since 2018.
Local knowledge
Why St. Augustine Homeowners Call Us for hvac
AirCrest Jacksonville HVAC has worked St. Augustine homes and businesses since 2018, and this coast writes its own rules. Salt air off the Matanzas and the Intracoastal eats at condenser coils and cabinet screws. Summer humidity sits near 90 percent for weeks, so your system runs longer and pulls more moisture than the same unit in inland Florida. Historic homes near St. George Street often hide ductwork behind plaster and heart-pine framing, which means flex duct and sheet metal duct have to be routed with care. We handle hvac St. Augustine FL calls in the Historic District, Lincolnville, Davis Shores, and out to Vilano Beach. Whether you need same day ac repair St. Augustine or a full heat pump changeout, we size the job with ACCA Manual J and Manual D, pull the Florida HVAC contractor license, and leave the space cooling like it should. Our techs test with anemometers and duct blasters, not guesswork.
Services available in St. Augustine
hvac Services We Run in St. Augustine
St. Augustine hvac demand splits hard between summer no-cool emergencies and fall tune-ups before the mild winter. If you are searching for hvac in St. Augustine near me, we cover the full list below, from a $180 capacitor swap to a full commercial rooftop changeout. Every job is quoted upfront before we start.
01
Air Conditioning Repair
AC repair in St. Augustine usually means a failed capacitor, a clogged condensate drain, or a refrigerant leak on a salt-corroded coil. We diagnose with a multimeter and clamp meter, then repair on the spot when the part is on the truck. Most no-cool calls in the Historic District and Lincolnville finish the same day.
View service 02Air Conditioning Installation
New AC installs in St. Augustine have to handle coastal humidity and high wind. We size with ACCA Manual J, seal the plenum, and set the pad above grade so storm surge and rain runoff do not sit on the cabinet. Common in Davis Shores and Anastasia Island new builds.
View service 03Air Conditioning Maintenance
A spring tune-up in St. Augustine means coil cleaning, capacitor testing, and a condensate flush before the 90-degree stretch hits. Salt air makes this a yearly job, not every other year. We check refrigerant charge with manifold gauges and clear the drain line with a vacuum pump.
View service 04Heating Repair
St. Augustine winters are mild, but a cold snap in January still sends heat pump repair calls. Common failures are defrost board issues, reversing valves, and ignition failure on older furnaces. We stock contactors and thermostats for Rheem, Goodman, and York units.
View service 05Heating Installation
Heat pump installs in St. Augustine run year-round because the same unit cools in July and heats in January. We match capacity to the home, seal duct connections, and set the defrost cycle for our humid winters. Popular in Vilano Beach and the 32086 corridor.
View service 06Heating Maintenance
Fall heating maintenance in St. Augustine catches defrost issues and dirty air filters before the first cold front. We test the reversing valve, check the aux heat strips, and verify the thermostat calibration. A 45-minute visit now saves an emergency call in January.
View serviceBuilt around the city
How We Run hvac Jobs in St. Augustine
St. Augustine hvac work has quirks you do not hit in Jacksonville. The Historic District has narrow streets, limited parking, and homes on piers, so we scope the access before we quote. Salt air means we treat every outdoor coil as a corrosion risk and rinse it on every maintenance visit. Ductwork in 1920s homes is often undersized, so we test static pressure with an anemometer and check leakage with a duct blaster before recommending a new unit. In the 32084 and 32080 ZIP codes, we schedule around bridge traffic on the Bridge of Lions and the Mickler-O'Connell Bridge so your window holds. If you need affordable hvac St. Augustine FL without a surprise line item, we quote the full job upfront. Permits go through St. Johns County, and we pull the Florida HVAC contractor license on every install. Most repairs finish in one visit; installs run one to two days.
Coils in Vilano Beach and Anastasia Island pit and leak within 6 to 8 years instead of 12. That means more refrigerant leaks, more coil replacements, and more R-410A recharge calls than inland homes see. We rinse every outdoor coil on maintenance visits, coat new coils when the homeowner wants it, and stock R-410A and R-32 so a leak repair does not wait on a parts order.
Homes near St. George Street and Flagler College often have plaster walls, no attic space, and returns that are too small. A standard changeout will not fix airflow, and the house stays humid. We run ACCA Manual D before any duct work, then use flex duct or sheet metal duct where the framing allows. For homes with no duct path, we install ductless mini-splits instead of forcing a central system.
Your AC runs longer and pulls more moisture, which stresses the compressor and can freeze the evaporator coil if the charge is off or the air filter is dirty. We verify charge with manifold gauges, check the evaporator for ice, and set airflow so the coil stays above freezing. We also recommend a whole-home dehumidifier for homes that stay above 55 percent indoor humidity.
Any hvac St. Augustine FL install or repair over a set dollar amount requires a licensed contractor. We hold the license and pull permits through St. Johns County so the work is inspected and your insurance stays valid.
Every tech who touches refrigerant must hold EPA Section 608 certification. That is why we recover, recycle, and recharge with a recovery machine instead of venting R-410A or R-32 to the air.
These are the load calculation and duct design standards we use on every install. Skipping them is why so many St. Augustine homes end up with an oversized unit that short-cycles and never removes humidity.
Common local problems
Common hvac Problems in St. Augustine
Refrigerant leaks from salt-corroded condenser coils
Frozen evaporator coils from restricted airflow
Clogged condensate drains and overflowing pans
Heat pump defrost failures in winter
Warning signs
Signs You Need hvac Service in St. Augustine
This usually means low refrigerant from a leak, a dirty evaporator coil, or a failing compressor. In coastal St. Augustine, salt air corrodes coils and creates leaks. Running a system low on charge for weeks can kill the compressor, turning a $400 repair into a $2,000 one.
Ice on the indoor coil points to restricted airflow or a low charge. Dirty air filters and undersized returns are common in older Lincolnville and Historic District homes. Turn the system off, let it thaw, and call us before you run it again.
A humming condenser with a still fan is almost always a failed capacitor or a seized fan motor. Both are same-day repairs if the part is on the truck. We stock capacitors for Carrier, Trane, Lennox, Goodman, and Rheem units.
A clogged condensate drain is the usual cause. In our humidity, algae grows fast in PVC condensate lines. If the drain pan overflows, it can damage flooring and drywall. We clear the line with a vacuum pump and add a pan treatment.
A thermostat that clicks without starting the system can be a bad thermostat, a tripped float switch, or a failed contactor. We test with a multimeter before replacing anything. Sometimes it is a $30 part, sometimes it is a wiring issue.
Pricing and expectations
hvac Pricing in St. Augustine: What to Expect
Typical 2026 pricing for hvac in St. Augustine runs $99 to $149 for a tune-up, $180 to $450 for common repairs like capacitors and contactors, and $5,500 to $9,500 for a full system changeout. Coastal homes on Anastasia Island and Vilano Beach often land at the higher end because salt corrosion means more coil and refrigerant work. Historic District homes can add labor if ductwork has to be routed through plaster or a crawlspace. We quote the full job upfront, so the number you hear on the phone is the number on the invoice. If you are searching for affordable hvac St. Augustine FL, ask about our maintenance plan, which covers two visits a year and discounts repair labor.
Outdoor coils in Vilano Beach and Anastasia Island pit faster than inland. If the coil is leaking, the repair jumps from a $200 capacitor to a $1,200 coil replacement. We inspect the coil on every call so you know which one you are facing.
Homes near St. George Street and Flagler College often have no attic and tight mechanical closets. Routing new ductwork or a line set through plaster adds labor hours. We scope the access before quoting so there is no surprise.
A 2-ton unit for a small Lincolnville bungalow costs far less than a 5-ton system for a Davis Shores home. Higher SEER2 equipment and variable-speed compressors add to the upfront price but cut summer bills. We size with ACCA Manual J so you do not overpay for capacity you will not use.
We know the route
Navigating St. Augustine: Landmarks We Use
St. Augustine is a tight, historic city, and we plan routes around the landmarks locals know. The Castillo de San Marcos and the Plaza anchor the north end of the Historic District, and St. George Street runs the pedestrian core where we park and walk to courtyard units. Flagler College sits just west, and the St. Augustine Lighthouse marks the south end of Anastasia Island. Anastasia State Park is our north-island reference point for beachside addresses. Knowing these landmarks keeps our arrival windows honest.
Castillo de San Marcos
The Castillo anchors the north end of the Historic District. We use it as a reference point for addresses along the waterfront and the streets feeding into the Plaza, which helps us plan parking before we arrive.
St. George Street
St. George Street is the pedestrian core of the Historic District. Many addresses here have no driveway, so we park on a side street and walk equipment in. Knowing the cross streets saves 10 to 15 minutes per call.
Flagler College
Flagler College sits just west of the Historic District. We use its campus as a north-south reference for the surrounding residential streets, many of which have tight mechanical closets and limited parking.
St. Augustine Lighthouse
The lighthouse marks the south end of Anastasia Island. It is our reference point for addresses along the island's eastern edge, where salt air and wind exposure are heaviest on outdoor equipment.
Anastasia State Park
Anastasia State Park sits at the north end of Anastasia Island. We use it to orient beachside addresses and to plan routes that avoid the park entrance traffic on busy weekends.
St. George Street commercial district
This pedestrian corridor is lined with restaurants, shops, and small hotels, most of which run split systems or rooftop units. Service calls here are usually scheduled before opening or after closing so we do not block foot traffic.
St. Augustine service coverage
St. Augustine Neighborhoods We Cover
We run trucks through the Historic District, Lincolnville, Davis Shores, and Anastasia Island every week, plus Vilano Beach and the 32084, 32080, and 32086 ZIP codes. If you are on the island or west of the San Sebastian, we can usually be there the same day.
Historic DistrictLincolnvilleDavis ShoresAnastasia Island
320803209532084
AirCrest Jacksonville HVAC2621 Silver St, Jacksonville, FL 32206, USA
Local results
Recent hvac Jobs in St. Augustine
A 1930s bungalow in Lincolnville had no ductwork and the homeowner was using three window units to cool four rooms. Summer indoor humidity sat at 68 percent.
We designed a three-head ductless mini-split system with ACCA Manual J, ran copper line sets through the exterior wall, and sealed every penetration against salt air and rain. Each head got its own drain line to a PVC condensate run. Indoor humidity dropped to 48 percent, the window units came out, and the homeowner's July power bill fell by about $95 compared to the prior year.
A Davis Shores home lost cooling in August. The outdoor condenser coil was pitted from salt air and the system was low on R-410A.
We leak-tested with an electronic detector, found the leak at the coil, and replaced the condenser coil rather than the whole unit. We recharged with R-410A, replaced the filter drier, and rinsed the new coil. The system held charge and cooled the house to 74 degrees within two hours. The repair cost $1,180 instead of the $6,400 a full changeout would have run.
A rental near Anastasia State Park kept freezing its evaporator coil every few weeks. The tenant was changing the air filter but the coil still iced over.
We tested static pressure with an anemometer and found the return was undersized. We enlarged the return, sealed duct leakage with mastic, and corrected the refrigerant charge with manifold gauges. No freeze-ups in the following cooling season, and the property manager reported 12 percent lower cooling costs across the summer.
Notes from local customers
What St. Augustine Customers Say
Our AC died on a Saturday in July and the house hit 86 degrees by noon. AirCrest had a tech at our door in about 80 minutes. He found a failed capacitor, swapped it, and checked the refrigerant charge with gauges before he left. Fair price, no upsell. We have used them twice since for tune-ups.
We bought a 1950s block home in Davis Shores and the ductwork was a mess. They sealed the leaks, replaced a crushed flex run, and set the outdoor unit on a new pad above grade. The house cools evenly now and the humidity is way down. They explained everything without talking down to us.
Called at 6 a.m. when the heat pump started blowing cold air in January. They walked me through the thermostat over the phone, then sent a tech who found a bad defrost board. Fixed the same morning. The office called back that afternoon to confirm everything was working. That is the kind of follow-up you remember.
Plan for the season
How St. Augustine Seasons Affect Your hvac
Book a tune-up in April. We clean the coil, test capacitors, flush the condensate drain, and check refrigerant charge before the first 90-degree day.
Change your air filter every 30 days and keep the outdoor unit clear of debris. If the house will not drop below 78 degrees, call us before the compressor overheats.
Schedule heating maintenance in October. We test the defrost cycle, reversing valve, and aux heat strips so the first cold snap does not catch you off guard.
If your heat pump blows cold air, check the thermostat first, then call us. A failed defrost board is a same-day repair if you catch it early.
Nearby service areas
St. Augustine and Nearby Cities We Serve
St. Augustine is one stop on a route that runs from the Jacksonville core down through St. Johns County. If you are in one of the neighborhoods below, we can usually fold your call into the same day's schedule.
Before you hire
What to Ask Before Hiring an hvac Contractor in St. Augustine
Are you licensed and insured in Florida?
Do you pull permits for installs in St. Johns County?
Will you do a Manual J load calculation before sizing my new system?
Do your techs hold EPA Section 608 certification?
What is your warranty on parts and labor?
Trust and compliance
Licensed, Insured, and Local
Florida HVAC contractor license
St. Johns County occupational license
NATE certification
North American Technician Excellence
EPA Section 608
U.S. Environmental Protection Agency
OSHA 10
Occupational Safety and Health Administration
St. Johns County Chamber of Commerce
member
St. Augustine Lighthouse and Museum
community sponsor
Most St. Augustine hvac repairs run $180 to $450, tune-ups cost $99 to $149, and a full system changeout runs $5,500 to $9,500 in 2026. Coastal homes on Anastasia Island and Vilano Beach often land higher because salt corrosion means more coil and refrigerant work. We quote the full job upfront.
The best hvac St. Augustine company is the one that is licensed, insured, stocked for coastal work, and willing to show you the load calculation before quoting a new system. We have served St. Augustine since 2018, hold the Florida HVAC contractor license, and carry EPA Section 608 certified techs. Ask any contractor those questions before you hire.
Yes. We run 24/7 hvac St. Augustine FL emergency service, including nights, weekends, and holidays. Most no-cool calls in the 32084 and 32080 ZIP codes get a tech on site within 90 minutes. Call (312) 638-0812 and you will reach a real person, not a voicemail.
Check the Florida HVAC contractor license, confirm insurance, ask whether they pull St. Johns County permits, and make sure they do an ACCA Manual J load calculation before sizing a new unit. A contractor who skips the load calc will sell you the wrong size system. Get the labor warranty in writing too.
Standard appointments are usually same day or next day, and emergency calls in the Historic District, Lincolnville, and Davis Shores typically see a tech within 90 minutes. Anastasia Island and Vilano Beach run 30 to 45 minutes depending on bridge traffic. Call before 4 p.m. for same day ac repair St. Augustine.
Your next step is waiting
Get hvac in St. Augustine Done Right
We have run hvac in St. Augustine since 2018, and we know what salt air, humidity, and historic homes do to a system. If your AC is down or your heat pump is blowing cold air, call us. We answer the phone 24/7, quote the full job upfront, and carry the parts to finish most repairs in one visit. No voicemail, no runaround.
Start with the basics
call AirCrest Jacksonville HVAC
Call (312) 638-0812 and a live person answers, not a phone tree. We book same-day appointments across Jacksonville and Duval County, and our after-hours line stays open for emergencies. Tell us what the system is doing and we will load the right parts before the truck rolls.