Evaporator Coil Replacement Cost
Typical market range as of May 2026 · regionalized for northern Illinois
Most homeowners
$1,800
The evaporator coil is the indoor coil (above or inside your furnace/air handler) where refrigerant absorbs heat from your home's air. A leaking or corroded coil typically costs $1,000–$3,500 to replace. Warranty status is the biggest swing: still under the manufacturer's parts warranty, you're often $1,000–$2,500 (labor and refrigerant); out of warranty, $2,500–$4,500+.
Pricing this job, not hiring for it? See what the work is worth →What drives the price
Warranty status
An in-warranty coil means you mostly pay labor and refrigerant. Out of warranty, the coil part itself adds $600–$2,000.
System size
Coil material scales with tonnage — a 2-ton coil costs less than a 5-ton coil.
Cased vs. uncased
A cased coil (in its own housing) costs more than an uncased coil but installs cleaner; matching the existing setup matters.
Refrigerant & labor
Recovering refrigerant, swapping the coil, evacuating, and recharging is several hours of skilled labor.
In our market — McHenry County & northern Illinois
In the McHenry County area, an evaporator coil replacement typically runs $1,400–$2,800 depending on warranty and tonnage. A coil that's leaking on a system more than ~12 years old is another repair-or-replace fork — especially if it's an aging R-22 system, where new-coil money is usually better spent on a modern unit.
Walk in informed
Always check the parts warranty before authorizing — coils commonly carry 5–10 year coverage and that can cut your cost by half or more. If the coil and compressor are both failing on an old system, you're really looking at a replacement.
Fair Price Guide is iHVAC's market research for informational purposes and is strictly advisory. Actual prices are set by the independent technician. iHVAC is not a party to any transaction and assumes no liability, operating with zero middleman billing or liability.
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For the tech
What this work is actually worth
Undercharging is the chronic problem for independent and side-job techs — you quote the part plus a little, forget what it really costs to show up, and train customers to expect cheap. The ranges above aren't a ceiling. Here's how to think about pricing this job so you're not working for free.
Why it's worth it
Coil swaps are labor-dense — recovery, removal, braze, evacuate, recharge — and the warranty paperwork matters. The skill to do it leak-free the first time is what you're selling.
Don't undercut yourself
Don't leave refrigerant and recovery time out of the quote. A coil job priced like a bolt-on loses money every time.
Build these into every price — not just the part:
Drive + windshield time. The hour each way isn't free. If you're not billing for getting there, you're working below your hourly.
Truck, tools, fuel. Your van, gauges, recovery machine — what they cost to own and run is overhead on every single call.
License, insurance, bond. Carrying real coverage is what separates you from the unlicensed guy. It has to be priced in, not eaten.
Callback & warranty risk. Some jobs come back. A price with zero margin for a return trip loses money on the ones that do.
Taxes & self-employment. As a 1099 independent you owe self-employment tax and your own withholding. The number you charge isn't the number you keep.
Your expertise isn't free. Knowing exactly what's wrong in five minutes is the product. An unskilled-labor rate undersells the one thing customers can't get elsewhere.
Help build the real number
The most accurate guide isn't built from national averages — it's built from what techs in your area actually charged. Contribute what you charged for this job and it feeds the local range here. It's opt-in, fully anonymized, and only ever shown as an aggregate once enough techs have contributed — never your individual price, never a price iHVAC sets, never a floor anyone has to hold. Just real market information, so the whole trade prices its work fairly.
Contribute what you chargedCommon questions
Why does an evaporator coil leak?
Formicary ('ant-nest') corrosion from indoor air chemicals, age, or physical damage. Tiny pinhole leaks let refrigerant escape, which is why a coil leak often shows up first as 'low on Freon.'
Can't I just keep recharging instead of replacing the coil?
Recharging a leaking coil is throwing money away — and venting refrigerant. Once a coil is confirmed leaking, replacing it (or the system) is the real fix.
Coil only, or the whole system?
If the coil is under warranty and the rest of the system is healthy and matched, replace the coil. If it's old, out of warranty, or mismatched to a new-refrigerant world, replacement often wins.
Related costs
How we research these numbers
This range is synthesized from published 2025–2026 US HVAC cost data and HVAC field knowledge, then regionalized toward northern Illinois. It's market reference — not a quote, and not a price iHVAC sets. As real techs complete jobs on iHVAC, these ranges will be backed by the actual local prices homeowners pay — the most accurate source there is.
References triangulated for this guide: