A Lennox CH33 evaporator coil typically costs about $800-$2,000 for the part, while professional replacement commonly totals $1,800-$4,200. The exact price depends on the coil’s full model number, system capacity, refrigerant, local labor rates, and whether refrigerant lines or other components need work.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Replacement CH33-compatible coil | $800 | $1,300 | $2,000 | Part price varies by exact model and availability |
| Installed coil replacement | $1,800 | $2,800 | $4,200 | Standard access and compatible equipment assumed |
| Labor | $500 | $900 | $1,500 | Usually 4-8 hours, depending on access and system work |
| Refrigerant and related work | $150 | $450 | $1,200 | Higher when the charge is large or refrigerant is costly |
What a Lennox CH33 coil replacement usually costs
For a typical residential system, budgeting $1,800-$4,200 for a complete CH33 coil replacement is reasonable. A straightforward job with a readily available compatible coil may fall near $2,000-$2,800. A higher-capacity system, hard-to-source part, or substantial refrigerant work can push the bill above $3,500.
The coil alone may be listed or quoted for roughly $800-$2,000 before installation. Online listings may show lower prices, but they may not confirm compatibility, include shipping, or cover the cost of refrigerant handling and professional installation. A contractor’s part price may also include sourcing, warranty administration, and overhead.
For a standard-access replacement, use about $2,800 as a planning estimate, then adjust for the exact model and local labor. Assumptions: residential split system, compatible replacement coil, ordinary access, and no major duct or cabinet changes.
“CH33” identifies a coil family, not necessarily one interchangeable part. The complete model and serial information on the indoor equipment label help a contractor verify coil dimensions, capacity, refrigerant, connections, and cabinet fit. A quote based only on the CH33 name may be incomplete.
How coil, labor, and refrigerant charges shape the quote
A written estimate should show the coil price separately from labor and supporting work. That makes it easier to compare bids and spot a quote that excludes refrigerant recovery, evacuation, or startup testing. The following ranges are approximate U.S. residential figures, not fixed national rates.
| Quote component | Typical range | What it may cover | Price driver |
|---|---|---|---|
| Coil and shipping | $800-$2,000 | Compatible replacement coil and delivery | Exact model, capacity, availability |
| Labor | $500-$1,500 | Removal, fitting, brazing, and reassembly | Access, cabinet design, crew time |
| Refrigerant handling | $150-$700 | Recovery, evacuation, and recharge | Refrigerant type and charge amount |
| Small materials and testing | $100-$400 | Filter drier, nitrogen, sealant, leak checks | Required components and test results |
| Disposal or trip charges | $50-$250 | Old part disposal or diagnostic visit | Company policy and local rules |
Labor may be priced as a flat installation charge rather than an hourly line. Where hourly billing applies, HVAC rates often run about $100-$200 per technician hour, with higher service-call minimums in some markets. The formula is .
Ask whether the quote includes refrigerant recovery, a new filter drier, leak testing, evacuation, and system startup. A low part-only estimate is not comparable with a complete installed price.
Model number, tonnage, and refrigerant can change the price
The most important cost variable is the complete coil model number. A compatible replacement may differ in height, width, connection location, or metering device. If the original CH33 part is discontinued or not stocked locally, a contractor may need to locate an OEM part, confirm an approved substitute, or modify the installation. Special ordering can add shipping time and cost.
System capacity also matters. Residential equipment commonly ranges from about 1.5 to 5 tons. A coil sized for a 4- or 5-ton system can cost more than a smaller-capacity coil, and larger refrigerant charges may raise service costs. Coil capacity must match the outdoor unit and indoor airflow requirements; selecting a cheaper mismatched coil can reduce performance or damage equipment.
Refrigerant type is another major variable. Older systems may use R-22, while many later systems use R-410A or another specified refrigerant. R-22 availability and cost can make recharging an older system especially expensive; the amount needed and local supply affect the final bill. The contractor should identify the refrigerant from equipment labels, not assume it from the CH33 designation.
Access can add several hundred dollars when the coil sits in a cramped attic, tight closet, or difficult-to-open air handler. A job requiring cabinet alteration, new refrigerant piping, drain-pan work, or electrical changes can move beyond the ordinary replacement range. Get the full model number and refrigerant listed on the estimate before comparing prices.
Regional labor rates and part availability across the U.S.
Location affects both labor and sourcing. In high-cost metro areas and parts of the Northeast, West Coast, and Hawaii, installed prices may be about 10%-25% above a typical national estimate. Rural areas may have lower labor rates but higher delivery charges or longer waits if a compatible coil is not stocked nearby.
In lower-cost markets, a routine replacement might land around $1,700-$3,000. A comparable job in a major metro may run $2,300-$4,800, especially if the contractor must order a discontinued or uncommon configuration. These figures describe broad regional differences; access, refrigerant, and equipment compatibility can outweigh the location effect.
Parts availability also changes the quote. A common compatible coil may arrive quickly, while a specialty or older replacement may require additional sourcing. Ask whether the quoted part is OEM or an approved equivalent, whether delivery is included, and how long the contractor expects the system to be out of service.
Compare local estimates using the same part specification and included tasks, not just the bottom-line total. A quote that includes expedited shipping or a longer parts warranty may reasonably cost more than one that excludes those items.
How long HVAC technicians need for CH33 coil work
A standard coil replacement often takes 4-8 hours on site. The range accounts for recovering refrigerant, opening the air handler or coil cabinet, removing the old coil, installing and brazing the replacement, pressure testing, evacuating the system, and charging it. A second technician may be used for portions of the job, particularly when equipment is difficult to handle.
Simple access and a confirmed replacement part can keep the work near the shorter end. Tight attic access, a coil that does not fit the existing cabinet, extensive line repairs, or a failed leak test can extend the job to a full day or require a return visit. These complications may add $200-$800 or more, depending on parts and labor.
Parts delays are separate from installation time. Older CH33 configurations may not be available for same-day replacement, and a contractor should confirm stock before scheduling. If the system has stopped cooling, ask whether temporary measures are safe and whether a diagnostic or emergency service charge is separate from the replacement estimate.
Confirm whether the quoted labor covers commissioning and a return visit if testing reveals a leak. The estimate should state what happens if the selected coil is incompatible or additional repairs are discovered after removal.
Repairing a leaking coil versus replacing the system
A small repair may cost about $300-$1,000 when the leak is accessible and the coil can be repaired safely. However, coil leaks can be difficult to locate, and a patch may not last. If the coil is badly corroded, has multiple leaks, or needs frequent refrigerant refills, replacement is often more dependable than paying repeatedly for diagnosis and temporary repairs.
Replacing only the indoor coil usually costs less than replacing the full cooling system, which can run roughly $5,000-$12,000 or more depending on capacity, efficiency, ductwork, and regional labor. But a new coil must be compatible with the outdoor condenser and controls. On an older system, the contractor should explain whether the existing equipment’s age, condition, and refrigerant make a coil-only job sensible.
For equipment around 10-15 years old or older, compare the coil quote with a matched system replacement estimate. A new coil does not restore a worn compressor, blower motor, or aging outdoor unit. On the other hand, replacing an otherwise reliable system solely because its coil failed may add thousands of dollars unnecessarily.
Compare the expected cost of another repair with the price of a compatible coil and a complete system, using the equipment’s condition as well as its age. Ask for the diagnosis in writing, including leak location and whether the coil itself or another connection is leaking.
Extra charges for refrigerant, drain work, and difficult access
Some items are not included in the advertised coil price. Refrigerant recovery and recharge may be billed separately, and a system that has lost most of its charge can require more refrigerant than a routine top-off. Depending on refrigerant type and quantity, this work can add about $150-$1,200. The estimate should state the assumed charge and how additional refrigerant will be priced.
A clogged or damaged condensate drain, rusted drain pan, or leaking connection may require extra parts or labor. Minor drain repairs may cost $100-$400, while a pan or cabinet modification can cost more. If a filter drier, refrigerant line section, or metering component needs replacement, request an itemized explanation of why it is necessary.
Attic or crawlspace access, unusually heavy equipment, and cabinet alterations can add $200-$800 or more. Emergency evening or weekend scheduling may also carry a premium, often around 20%-50% above regular labor pricing. Local permit requirements vary; many like-for-like coil replacements do not require a separate permit, but code upgrades or associated electrical work may change that.
Before approving extras, ask which charges are required for safe operation and which are optional improvements. A quote should distinguish necessary leak repair and testing from discretionary upgrades.
Ways to lower a CH33 replacement bill without cutting corners
Use the complete indoor and outdoor model numbers when requesting estimates. This helps contractors verify a compatible coil and reduces the chance of a second trip or a wrong-part order. Provide photos of the equipment label and installation area, but have a licensed HVAC professional confirm the final match.
Request two or three written estimates that use the same scope. Each should identify the coil manufacturer and model, labor, refrigerant work, testing, disposal, warranty, and any potential extra charges. Compare the total installed price as well as the assumptions behind it; a low bid that excludes charging or leak testing may cost more after the work begins.
Schedule during a non-emergency period when possible. A planned weekday appointment can avoid rush charges and allow time to source a compatible part. If the outdoor unit is also old or failing, ask for separate coil-only and matched-system prices rather than accepting an automatic recommendation to replace everything.
Keep the existing cabinet and refrigerant lines if they are sound and compatible, but do not insist on reusing parts that fail inspection. Avoid paying for upgrades that do not address a documented compatibility, safety, or performance issue. The most reliable savings usually come from confirming the right part and comparing complete, like-for-like quotes.