How Much Does Evaporator Coil Replacement Cost in Orlando?

How much does it cost to replace an evaporator coil in Orlando?

$1,500–$2,500 installed, which makes it the second most expensive AC repair on our price list after a compressor ($1,200–$2,800). Most Orlando coil jobs land in the middle of that range.

That number is the whole job: the coil, the labor to cut the old one out and braze the new one in, a new filter-drier, a full evacuation, and the refrigerant to recharge the system. On a 3-ton system the refrigerant alone is 6–10 pounds, and at $110–$200 per pound for R-410A that line item can be $700–$1,800 by itself — which is why a coil quote in 2026 looks nothing like one from 2021. The parts side is the other half: a brand-matched cased coil for a common Carrier, Trane, Rheem, or Goodman air handler is a few hundred dollars; an oddball size or a discontinued model can double that. Every quote we write starts with the same published price table, and the $89 diagnostic that found the leak comes off the total when you approve the work.

What does the evaporator coil actually do?

It is the cold half of your system — the indoor coil inside the air handler where refrigerant boils off and pulls heat and humidity out of the air. In Orlando it moves gallons of water a day.

Your AC has two coils. The condenser coil sits outside and dumps heat; the evaporator coil sits inside the air handler (usually in the attic or a closet) and absorbs it. Warm, wet indoor air passes over refrigerant running at roughly 40°F inside the coil's copper or aluminum tubing, the refrigerant evaporates, and the air leaves 15–20°F colder and much drier. In a Florida summer that coil is wringing 5–15 gallons of condensate out of your house every day, which is why it sits over a drain pan and a drain line. Everything the coil does depends on the tubing being sealed. The moment it isn't, refrigerant leaves, the pressure drops, and the coil stops doing its job — and no amount of thermostat adjustment brings it back.

Why do evaporator coils leak so often in Florida?

Formicary corrosion. Humidity plus everyday household chemicals eat pinholes through copper tubing, and Orlando coils sit wet 8–9 months a year. Age finishes the job around years 8–12.

The failure that kills most Orlando coils is invisible until it isn't. Formicary corrosion is a chemical attack on copper caused by volatile organic compounds — cleaning sprays, air fresheners, paints, even some building materials — combining with moisture on the coil surface. It bores tunnels the width of a hair through the tubing, and one tunnel is enough. Florida gives it perfect conditions: the coil is wet from May through October, the house is closed up and recirculating those chemicals, and the system logs 2,800+ run hours a year, roughly a third more than a northern system. Add a decade of thermal cycling and vibration and the copper gives out. Manufacturers moved many coils to aluminum in the 2010s to slow this, which helps — it does not cure it. This is also why we tell homeowners a coil leak on an 8-year-old system is not bad luck; it is the expected end of that part's life in this climate.

How do I know it's the evaporator coil and not something else?

Five signs: ice on the indoor coil or line set, a system that needed refrigerant more than once, a faint hissing at the air handler, weak cooling with the unit running nonstop, and indoor humidity that won't drop below 60%.

A leaking coil looks like a low-refrigerant system, because that is what it is. The tell is that the low charge comes back. A capacitor or a drain problem announces itself with a hard stop; a coil leak is a slow fade — the house runs 2–3°F warmer than the setpoint, the system runs 20 hours a day, the power bill climbs, and the air feels clammy because a starved coil stops removing humidity before it stops cooling. Frost or ice on the copper line at the air handler is the classic picture. The confirming test is not a guess: we put gauges on the system, check superheat and subcooling, and find the leak with an electronic detector and, when needed, dye or nitrogen pressure. On our calls that leak gets documented on video and shown to you before any part is quoted. If your system is running but not cooling, the 10 causes ranked by our real data will tell you where a coil leak sits on the list — it is not first, and it should not be the first thing anyone quotes you.

Can't I just keep adding refrigerant instead of replacing the coil?

You can, and it is the most expensive way to own an air conditioner. At $110–$200 per pound, a 3-ton system that loses its 6–10 pound charge every season costs $700–$1,800 a year in refrigerant alone.

Topping off is renting refrigerant. It buys cooling for a few weeks or months, the leak keeps leaking, and each visit is a service call plus pounds at the current price — a price that is climbing every year as federal R-410A production cuts bite. Two summers of top-offs on a 3-ton system can equal the cost of the coil, with nothing to show for it. There is also a mechanical cost: a system running low on charge runs the compressor hot and starved of the oil that circulates with the refrigerant, and a compressor is the one part more expensive than the coil. That is why our rule is a leak search before any second pound goes in. A single top-off to get a family through a July weekend while the coil is on order is reasonable; a standing appointment to refill the same system every spring is not. The full price history and where it is headed is in our R-410A phase-out guide, and the leak-search side of the job is priced on our refrigerant leak repair cost page.

Why does the price range from $1,500 to $2,500?

Six variables: coil brand and match, cased versus uncased, where the air handler lives, how many pounds of refrigerant it takes, whether the TXV and filter-drier get replaced, and R-410A versus R-454B.

The coil itself is the first swing. An exact-match cased coil that slides into a modern air handler is the low end; a coil for an older or discontinued air handler that has to be adapted, or an uncased coil built into a custom plenum, pushes toward the top. Access is the second: a closet air handler on a slab is a 4-hour job, while an attic unit at 130°F with a 22-inch scuttle hole is a 6-hour job with work-and-cool breaks, and sometimes a helper. Refrigerant is the third and the biggest mover — 6 pounds at $110 is $660, 10 pounds at $200 is $2,000. Then the small parts that a proper coil job includes and a rushed one skips: a new filter-drier (mandatory when the system has been open), and often a new thermostatic expansion valve, since a TXV that spent a year starved is a coin flip. Finally, refrigerant type: a 2025-or-newer R-454B system uses an A2L-rated coil and refrigerant at $90–$150 a pound, and some of those parts are still on longer lead times. Once the coil is in hand the work is 4–6 hours; we have not yet timed enough coil jobs of our own to publish a dispatch-to-done number the way we do for capacitors, recharges, and drain lines, so treat 4–6 hours as the industry figure, not ours.

Can a new coil go on my old system — and which refrigerant does it need?

Yes on an R-410A system, with a matched R-410A coil. Never mix: an R-454B condenser cannot pair with an R-410A coil, and a mismatched coil voids the parts warranty and hurts efficiency.

This is the trap in 2026. Since January 1, 2025, new residential systems ship with R-454B, and the temptation when a coil fails on an older system is to piece together whatever is on the shelf. Two rules keep you out of trouble. First, the coil must be AHRI-matched to the outdoor unit — same refrigerant, compatible capacity and metering device. A mismatch is not a preference; manufacturers refuse warranty claims on unmatched systems, and the pairing typically gives up 10–20% of rated efficiency, which you pay for every month in Orlando. Second, refrigerants do not cross. R-454B is an A2L refrigerant that legally requires rated coils, leak sensors, and rated controls; no manufacturer approves running it in R-410A equipment, and the reverse is equally off the table. So the honest answer for a 2010–2024 R-410A system is a matched R-410A coil, which remains available and legal to service indefinitely. And if the outdoor unit is old enough that a matched coil is hard to find, that scarcity is itself an answer — you are now buying half of a new system, and the repair-or-replace math usually says buy the whole thing.

Is the evaporator coil covered under warranty?

The part often is — 10 years if the system was registered within 60–90 days of install, 5 years if not. The labor, refrigerant, and materials are not, and on a coil job that is $800–$1,500 of the bill.

Read the parts warranty before you approve anything, because a covered coil changes the math completely. Most major brands cover the evaporator coil under the general 10-year parts warranty when the system was registered at installation; miss that 60–90 day window and coverage usually drops to 5 years. Under warranty the manufacturer ships a replacement coil at no charge, and you pay for everything else: the 4–6 hours of labor, the 6–10 pounds of refrigerant, the filter-drier, and any TXV — realistically $800–$1,500 in Orlando. That is still a real savings against $1,500–$2,500, and it is the scenario where replacing a coil on a 6-year-old system is an easy yes. What voids it: unlicensed prior work, non-OEM parts, no maintenance records, or an unmatched coil. If you bought the house with the system, ask the seller for the install paperwork; many brands allow one transfer within 60–90 days of the sale. The full list of what is and isn't covered is in our AC warranties guide.

When should you replace the whole system instead of the coil?

Run two numbers. The $5,000 rule: repair cost times system age — a $2,000 coil on a 10-year-old system scores $20,000. The 30% rule: any repair over about $2,500 on an $8,500 system. A coil fails both on most 10+ year systems.

The evaporator coil is the repair that most often tips an Orlando system into replacement, and it should — the coil is half of the refrigerant circuit, the compressor is the other half, and the compressor on the same system is the same age. Here is the decision we walk through on every coil quote.

We are not neutral here — we sell new systems — so use the structure, not our opinion. A coil on a young, registered, never-leaked system is a good repair and we will do it happily. A coil on a 12-year-old system is $2,000 that most Orlando homeowners would rather have applied to a permitted, warrantied new system with a 10-year parts term and a compressor that is not on borrowed time. New-system pricing by size and SEER2 is on our new AC unit cost page, and the financing options put $8,500 at roughly $112–$180 a month.

Evaporator Coil Cost questions, answered