A Lennox evaporator coil replacement typically costs $1,500-$3,500 installed, with an average near $2,400. The final price depends on coil size and model, refrigerant type, labor access, local rates, and whether the system needs refrigerant or related repairs.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Installed Lennox coil | $1,200 | $2,400 | $5,000 | Coil replacement; unusual access or system changes may raise cost |
| Replacement coil only | $700 | $1,400 | $2,500 | Part price varies by model and availability |
| Labor | $500 | $900 | $1,600 | Usually 4-8 hours, excluding extensive repairs |
| Refrigerant and related work | $150 | $450 | $1,000 | Depends on refrigerant, charge amount, and leak testing |
Assumptions: U.S. residential split system, standard access, compatible replacement coil, and no major duct or electrical work.
What a Lennox coil replacement usually costs
For a common residential central air system, an installed Lennox evaporator coil often falls between $1,500 and $3,500. A smaller, readily available coil with clear access may land near the low end; a large or hard-to-source model, difficult cabinet access, or extensive refrigerant work can push the bill above $4,000.
Coil-only pricing is commonly $700-$2,500, but a part quote is not the full replacement price. The contractor may also charge for recovery and recharge of refrigerant, leak testing, brazing, labor, and disposal. Compare installed estimates that list the coil model, labor, refrigerant, and warranty separately.
How coil, labor, and refrigerant charges add up
Quotes vary in what they bundle. The table shows typical residential ranges; local labor rates and refrigerant requirements can change the totals. Equipment and labor prices below are separate cost components, not additional totals to add blindly to the installed range.
| Quote component | Typical range | Pricing basis | What it may include |
|---|---|---|---|
| Lennox coil | $700-$2,500 | Per coil | Model-matched indoor coil |
| Labor | $500-$1,600 | $100-$200 per hour | Removal, installation, brazing, and startup |
| Refrigerant work | $150-$1,000 | Per job | Recovery, evacuation, recharge, and leak checks |
| Disposal and supplies | $50-$250 | Per job | Old-part disposal and installation materials |
| Permit or inspection | $0-$300 | Per job | Required only in some jurisdictions |
Typical labor allowance: 4-8 hours at $100-$200 per hour; cabinet modifications or difficult access can add time.
A detailed quote should identify whether refrigerant, disposal, and any permit fee are included.
Which model, tonnage, and access details raise the estimate?
System capacity and coil configuration affect both part cost and installation time. A 2-3 ton residential system may use a less costly coil than a 4-5 ton system, although model compatibility matters more than tonnage alone. Lennox model and serial numbers help a contractor identify the correct coil and check availability.
Matched indoor and outdoor equipment, metering-device requirements, cabinet dimensions, and refrigerant type can rule out a cheaper substitute. A coil installed in a cramped attic or tight closet may require extra labor compared with a furnace cabinet in an open basement. Ask whether the proposed coil is approved for the existing system rather than relying only on a similar size.
Can repair work cost less than replacing the coil?
A diagnostic visit commonly costs $75-$200, sometimes credited toward repair. A simple drain-line clearing or condensate issue may cost $100-$400, but it will not fix a confirmed coil leak. Leak detection and minor accessible repairs can run roughly $300-$1,000; extensive corrosion, inaccessible leaks, or repeated refrigerant loss often make coil replacement the more practical comparison.
Get a written diagnosis that distinguishes a refrigerant leak from a clogged drain, frozen coil, or airflow problem. If the coil is leaking, adding refrigerant alone is generally a temporary measure, not a lasting repair. Compare the repair price and expected outcome with the installed replacement quote.
How do labor hours and refrigerant affect the final bill?
A straightforward replacement often takes one technician crew about 4-8 hours. The work can include recovering existing refrigerant, removing the old coil, installing and brazing the replacement, pressure testing, evacuating the lines, recharging, and checking operation. Additional time may be needed for a leak elsewhere, damaged refrigerant lines, or cabinet changes.
Refrigerant cost depends on the type and amount needed; older or less commonly available refrigerants can be more expensive than common current options. A quote should specify the refrigerant and explain whether it covers a full charge or only the amount added. Ask for separate labor and refrigerant allowances so changes are easier to evaluate.
Why Lennox coil quotes differ between U.S. regions
Labor and service overhead often make urban and high-cost coastal markets 10%-25% more expensive than lower-cost rural or inland markets. In remote areas, fewer contractors or limited parts availability can also raise charges. These are broad comparison ranges, not fixed regional pricing; the exact effect depends on the local contractor market and coil availability.
Emergency service, peak summer scheduling, and special-order parts may increase the estimate. Ask whether the quote includes expedited shipping or after-hours labor, and compare at least two local itemized bids when the system can safely wait. Use local installed quotes, not an online coil-only listing, to set the budget.
What Lennox warranty coverage can change the price?
Some Lennox equipment may have parts coverage if registered and eligible, but terms depend on model, installation date, registration, and warranty conditions. Coverage may pay for a qualifying replacement part while leaving labor, refrigerant, shipping, or diagnostic fees to the homeowner. The contractor should verify coverage using the unit information before final pricing.
Ask whether the quote includes a labor warranty and how long it lasts. A replacement coil may carry its own parts terms, but coverage does not necessarily match the original system warranty. Request the warranty status and out-of-pocket charges in writing before approving work.
Which choices can trim a Lennox coil replacement quote?
Confirm the diagnosis before authorizing replacement, and provide the system model and serial numbers when requesting estimates. This helps contractors check part fit and availability early. Schedule during a non-emergency period when possible, and ask whether standard shipping avoids a rush charge.
Compare the same scope across bids: coil model, labor, refrigerant, leak testing, disposal, permit, and warranty. Avoid paying for a full system replacement unless the contractor explains why the existing outdoor unit or other components are incompatible, unsafe, or near failure. Keeping the scope to a verified coil problem can prevent unrelated upgrades from inflating the bill.