Air Conditioner Repair Jacksonville Homeowners Rely On
Your air conditioner is still in place — it’s just not doing its job. We find out why, tell you the price before we touch anything, and tell you straight if a repair isn’t worth your money.
Great Dane Heating & Air has kept Jacksonville and Duval County comfortable for more than twenty years. We are a family company — the people who answer the phone are the people who show up — with upfront pricing, comfort techs who treat your home like their own, and a soft spot for shelter dogs. Every job we finish gives back to the Jacksonville Humane Society.
Most Jacksonville AC repairs come down to a handful of culprits: a failed capacitor or contactor, a clogged condensate line, a coil that needs cleaning, or a refrigerant leak. Tap whichever one sounds like your house.
AC Running but Not Cooling
Usually a refrigerant leak, a failed capacitor, or an outdoor coil packed with grass clippings and pollen.
AC Runs Constantly and Never Catches Up
On a 95° Jacksonville afternoon a healthy system should still cycle off. If it never does, it’s losing capacity.
AC Leaking Water Around the Air Handler
The condensate drain is clogged. Our humidity grows algae in that line, and most Jacksonville air handlers sit in the attic — directly above your ceiling.
AC Freezing Up: Ice on the Pipes or Coil
Shut the cooling off and set the fan to ON to thaw it. Don’t chip at it, and don’t keep running it — that’s how a repair becomes a compressor.
AC Making Loud Noises: Banging, Squealing or Grinding
Noises that are new are worth a look now rather than in August. Most start small and cheap.
AC Keeps Tripping the Breaker
Reset it once. If it trips again, stop and call — something is drawing current it shouldn’t, and that one is a safety issue.
No mystery, no pressure, and no work done before you’ve agreed to it.
01We listen, then we look
What it’s doing, when it started, what you’ve already tried — then we check the whole system. Refrigerant charge, electrical, airflow, drain line, coil condition. Not just the obvious part.
02You get the number before we start
The full price, what it buys, and why. You say yes or no. Nothing is opened up, replaced or billed before that conversation happens. The service call is $199, and it goes toward the repair.
03We show you the failed part
The dead capacitor comes out and goes in your hand. You should never have to take our word for what was wrong.
04We test it and clean up
We confirm it’s actually cooling before we leave, check the drain, and take our mess with us.
The honest part
Repair or Replace Your AC? We’ll Tell You Straight
A repair is the easy money. It’s the smaller number, you say yes faster, and we’re back out the door. Telling you to put that money toward a new system instead costs us the job today — we’d just rather you spent it once.
What you might hear
“You need a whole new system.”Said before anything has been properly diagnosed.
“That refrigerant is banned now.”It isn’t. R‑410A systems can still be serviced.
“This price is only good today.”A deadline on an $8,000 decision is a sales tactic, not a diagnosis.
What we’ll tell you
“Here’s what actually failed.”And here’s the part, out of the unit, in your hand.
“Here are both numbers.”Repair and replacement, so you can weigh them yourself.
“Take the night to think about it.”We’ll still be here tomorrow, and the price will be the same.
Why Air Conditioner Repair Is More Common in Jacksonville, FL
Northeast Florida is harder on a system than almost anywhere else in the country. Four reasons — and where each one lives in your house.
78°Set to 78° — nine months a year
March–NovemberYour AC Never Gets a Break
Your system cools from March into November and still runs on warm January afternoons. Parts wear by the hour rather than by the calendar, which is why a system here is effectively older than its age.
Salt airCoastal corrosion
From the beaches through the Intracoastal neighborhoods, salt spray eats condenser coils and the fins around them. Capacity drops long before anything quits — the first sign is usually the power bill.
The waterHumidity and drain lines
A Jacksonville summer asks your system to pull gallons of water out of the air, and every drop has to drain somewhere. A clogged condensate line is one of the most common no‑cool calls in this climate.
The atticDucts in 120‑Degree Air
Most Jacksonville ductwork runs through an attic that climbs well past 120 degrees in summer. Air chilled to the mid‑50s has to cross that space before it reaches a register — so a loose joint or a thin patch of insulation is paid for in every room.
What we repair
Common AC Repairs: What Breaks Inside Your System
Most Jacksonville AC repairs come down to a short list of parts. Here is where they sit, and what each one does to your comfort when it goes.
1
Blower wheel packed with dust
Airflow drops long before the system actually quits — you feel it as rooms that never quite catch up.
2
Scorched control board
Sometimes the system is fine and the board telling it what to do is not. We test the controls before condemning anything expensive.
3
Condensate pan overflowing
The Florida classic. The drain line clogs with what the humidity leaves behind, and the water finds your ceiling.
4
Refrigerant leaking at the joint
Oil residue and frost on the line. We find where it is escaping and repair it, rather than topping it up and leaving.
5
Compressor running hot
The expensive one — and where we are most likely to tell you a repair is not worth it against the age of the system.
6
Capacitor bulged and leaking
The most common failure we see. A cheap part, and the reason a system hums but will not start.
Central Air Repair, Whatever You’re Running
Central AC, Heat Pump and Mini-Split Repair
Straight-cool split systems, ductless mini‑splits, heat pumps, package units. If it cools a Jacksonville home, we’ve had our hands inside one.
A working air conditioner is comfort. A system looked after properly is something closer to peace of mind — especially in a Jacksonville August, and especially with small people in the house.
Vetted people in your home
Florida state certified — licence CAC036942 — fully insured, and BBB accredited at an A+ rating. The same small crew every time, not a rotating list of subcontractors.
The air they breathe all day
Florida humidity does not just make a house uncomfortable — it feeds what grows in it. Filtration, purification and humidity control keep the air in your rooms clean as well as cold.
Fixed right the first time
We show you the failed part, quote the whole number before we start, then test the system and clean up behind us. Our work is guaranteed — that is the whole point of the name on the truck.
The full price before we start.Tell us what your system is doing and we’ll tell you what it actually needs.
Paul came out and replaced our blower motor and saved the day. He fielded my call on Sunday evening, then did the service Monday afternoon. Friendly, efficient, and professional.
After years of feeling vulnerable to dishonest HVAC companies, a neighbor put me in touch. He quickly earned my trust — quick to return calls, reasonable rates, and he’s never tried to sell me things I don’t need.
We’ve used him for everything from small tweaks to replacing our entire unit. Quick, reliable, honest, and clean — and he beat the prices of every competitor. Yes, we priced out seven.
Fast and efficient, unbelievably affordable pricing. He quickly figures out the problem and explains it in a way anyone can understand. You automatically feel like you can trust him.
Our A/C went down and the team showed up Monday morning first thing. We had cool air flowing in no time. The crew was fast, clean, and finished under time.
Mike and the team were very professional, friendly, and knowledgeable. The price was not unreasonable. So happy we found this company — we know we will be taken care of in the years to come.
Just had Great Dane install a new A/C in my home. Mike came to my home, saw what I had, and I told him what I wanted installed. There was absolutely no sales pressure.
Mike came out and gave an estimate with no fluff, which is what I like. He was honest and professional. The team that installed the unit worked well together and the work performed was stellar!
My experience was beyond my expectations. They did an amazing job replacing my antique air conditioner! Mike gave me a great quote and DJ and his son completed this challenging job amazingly well.
Our outdated A/C system went down for good and I had called multiple other companies with little to no response. I called Great Dane and Mike was at my house in less than 15 minutes.
So glad I went with Great Dane to service my a/c. I highly recommend Quentin, who serviced the unit. He is extremely knowledgeable, highly competent, and up front about potential issues.
I’d been without A/C for quite some time. It was amazing — the care and concern that Mike (and MJ & Brandon) had about my situation. I know I chose the right company.
When your AC runs but doesn't cool the house, the usual causes are a bad capacitor, a dirty filter or coil, a refrigerant leak, a frozen coil, leaky attic ducts, or…
Straight answers, no jargon — including the ones that cost us money to answer honestly.
Why is my AC running but not blowing cold air?+
Usually one of four things: a tripped breaker on the outdoor unit, an air filter or outdoor coil choked with pollen and grass clippings, a failed capacitor, or a refrigerant leak. Two of those you can check yourself in a minute — make sure the thermostat is actually set to COOL, and check whether the breaker for the outdoor unit has tripped. Past that it needs gauges on it, and guessing gets expensive.
There’s ice on the pipes or the coil. What do I do right now?+
Switch the cooling off and set the fan to ON so it can thaw. Don’t chip at the ice and don’t keep running it in cooling — that is how a small repair turns into a compressor. A full thaw usually takes a few hours. Thawing is not the fix, though: if it froze once it will freeze again until somebody finds out whether it’s airflow or refrigerant causing it.
Water is pooling around my air handler. Is that urgent?+
Urgent enough to shut it off. Kill the thermostat and the breaker to the air handler, then move anything valuable out from under it. In Jacksonville this is nearly always a clogged condensate drain — our humidity grows algae in that line — and most air handlers here sit in the attic, directly above a ceiling. A failed float switch is the other usual suspect.
Should I call tonight, or can it wait until morning?+
Call tonight if anyone in the house is elderly, very young, pregnant, or has a heart or breathing condition; if you smell burning; if water is coming through the ceiling; or if the breaker trips again after one reset. Otherwise, if the house is holding in the low 80s overnight, morning is usually fine. Run fans, close the blinds on the west side, and we’ll get to you. We take emergency calls 24/7, holidays included.
The breaker keeps tripping. Can I just keep resetting it?+
Reset it once. If it trips a second time, stop and call. A breaker doing its job means something is drawing current it shouldn’t, and repeatedly forcing it back on is a genuine fire and shock risk rather than just an air conditioning problem. That one is worth a call even at an awkward hour.
The power went out and now the AC won’t start. How do I reset it?+
Give it five minutes before you decide it is broken. Most thermostats hold the compressor off for about five minutes after any shutdown so the pressure inside can equalize — Honeywell puts the number at five, which is the real version of the “three minute rule” people search for. A thermostat that just rebooted after an outage may not run that timer on its own, so wait it out yourself instead of flipping switches.
There may not be a reset button. Some outdoor units have a small red one; plenty do not. The real reset is power: thermostat OFF, breaker for the outdoor unit off, back on, then thermostat to COOL. Carrier says leave the breaker off for 30 minutes, which is longer than most people expect and does not hurt anything. Check the pull‑out disconnect in the small box beside the condenser too — it gets bumped.
If the indoor fan runs and the outdoor unit only hums or sits silent, stop there. And if the breaker trips the moment you set it, leave it off — that one is above.
Is my R‑410A system illegal now?+
No, and nobody is coming for it. R‑410A systems can still be serviced. New equipment moved to R‑454B in 2025, and that rule applies to what gets manufactured, not to what is already bolted to your slab. R‑410A production is stepping down rather than stopping, so topping off an older system gets a little pricier each year — a reason to plan ahead, not a reason to replace a healthy system today.
How do I know whether to repair it or replace it?+
What failed matters more than the birthday. A capacitor on an eight‑year‑old system is a repair every time; a compressor on a fifteen‑year‑old one usually is not worth it. Florida runtime also ages equipment faster than the national averages suggest. We’ll give you both numbers and tell you which one we’d choose — you can also run it through our honest read first.
The thermostat says 74 but the house still feels sticky. What’s wrong?+
Cooling and drying are two different jobs, and a system can do the first while skipping the second. Start with the free one: set the thermostat fan to AUTO, not ON. On ON the blower keeps running after the cooling stops and pushes air across a coil that is still soaking wet, which sends that water straight back into the house. (The one exception is thawing a frozen coil, where fan ON is exactly right — but that is temporary.)
After that it is usually one of three things: the system is bigger than the house needs and satisfies the thermostat before it has run long enough to pull moisture out, airflow is low from a dirty filter or coil, or a return duct in the attic is leaking and dragging hot, humid attic air into the system. Two of those three are fixable without new equipment.
Can I clear the condensate drain line myself?+
Usually, and we would rather you tried. Our humidity grows algae in that line, and a slime plug is what backs water into the pan and trips the float switch. Shut the power to the air handler off first. Outside, find where the white PVC line comes out near the condenser, put a wet/dry vac on the end, seal around it with a rag and run it a couple of minutes — that pulls the plug out the way it grew in. Then pour a cup of distilled white vinegar into the capped tee on the line inside. Not bleach: manufacturers including Rheem tell you in the install instructions to keep caustic drain cleaners away from the indoor coil, and a plugged line backs up onto it.
Two limits. Plenty of clogs are debris rather than something growing, and debris does not dissolve. And a line that plugs more than about once a year usually has a slope or trap problem that no amount of vinegar fixes. If water has already reached a ceiling, skip all of this, shut it off and call.
Water is dripping from a ceiling vent but the drain pan is dry. What is that?+
That is usually condensation, not a leak. Your ducts and air handler sit in an attic that runs well over 100 degrees and stays humid, and any cold surface up there that is not properly insulated pulls water out of the air the way a glass of iced tea does. The usual causes are duct insulation that has been crushed or torn — often by whoever was up there last — a supply plenum that was never wrapped properly, or air leaking out of a duct seam and chilling the sheet metal around it.
Check the drain first, because a clog is the more common problem. But if the pan is dry and the outside of the metal is wet, the fix is insulation and sealing, not plumbing.
How much does an AC repair service call cost in Jacksonville?+
$199, and it goes toward your repair.
Do you offer financing for AC repair?+
Yes. Financing is available. Ask us when you call.
One call covers the rest of the house.This page is one job. These are the others.
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