Green Flow Solution logo
Schedule Service

Evaporator coil

Back to Lennox products

Lennox Evaporator coil CK40DT-42B-**

Request ServiceEquipment Quote
Lennox Lennox AHRI Indoor - CK40DT dedicated indoor coil Evaporator coil Repair, maintenance, and replacement planning
Lennox CK40DT-42B-** product image

Technical Specifications

Product Specs

  • AHRI unit role: Indoor
  • AHRI model/pattern: CK40DT-42B-**+TDR
  • AHRI records represented: 46
  • AHRI equipment type: Central HP
  • AHRI tonnage: 2.9166666666666665
  • AHRI refrigerant: R-454B
  • Verified catalog model: CK40DT-42B-**+TDR
  • Verified product family: CK40DT dedicated indoor coil
  • Verified catalog brand: Lennox
  • Verified model family: CK40DT
  • AHRI model/pattern: CK40DT-42B-**+TDR
  • Nominal capacity: 3.5 ton
  • Capacity code: 42
  • Cabinet code: B
  • Configuration: dedicated indoor coil for commercial split-system applications
  • Official family range: 1.5-5 tons
  • Refrigerant: matched-system dependent; confirm metering device/TXV for the installed outdoor unit
  • Official product page: https://www.lennox.com/commercial/products/split-systems/indoor-coils/ck40-indoor-coil

Useful troubleshooting details

  • Confirm the installed model and serial number, matched indoor or outdoor equipment, voltage, refrigerant, controls, and AHRI certificate before service or replacement planning.
  • Use the linked AHRI certificates to verify matched-system combinations, rebate conversations, and equipment eligibility before quoting replacement work.
  • Collect photos of the nameplate, equipment access, recent fault history, and comfort symptoms before dispatch or proposal planning.

Certification match

AHRI certificates

View All
Eligible Central HP <5.4 tons

AHRI 216769599

AHRI 216769599 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40DT-42B-**+TDR.
Eligible Central HP <5.4 tons

AHRI 216769614

AHRI 216769614 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-060-230A** and indoor unit CK40DT-42B-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217189884

AHRI 217189884 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40DT-42B-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217189885

AHRI 217189885 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40DT-42B-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217189886

AHRI 217189886 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40DT-42B-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217189887

AHRI 217189887 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40DT-42B-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217189888

AHRI 217189888 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40DT-42B-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217189950

AHRI 217189950 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-060-230A** and indoor unit CK40DT-42B-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217189951

AHRI 217189951 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-060-230A** and indoor unit CK40DT-42B-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217449940

AHRI 217449940 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40DT-42B-**+TDR.
Loading more

Service planning

How GreenFlow handles CK40DT-42B-** requests

1

Identify the equipment

Confirm the model or series name, serial number if available, photos, and whether the unit is roof, exterior, basement, or mechanical-room equipment.

2

Describe the service issue

Share no heat, no cooling, weak airflow, error codes, alarms, leaks, noise, control problems, or comfort complaints.

3

Review access and history

Include access notes, tenant or business-hour constraints, filter status, recent repairs, and maintenance records when available.

4

Plan the next step

GreenFlow can route the request for diagnostics, repair planning, maintenance, replacement scope, or related system upgrades.

Our Services

Showing services from our catalog

Brands We Service

Popular cities

Service Areas

Our Happy Customers

Michele Z.

Andrey was professional, prompt, smart, thorough and exceedingly pleasant. We are likely switching our current HVAC company to Green Flow.

Murali S.

HVAC technician was punctual, followed up well, completed quick repairs, ensured the issue was resolved, and provided helpful recommendations.

Anna F.

They showed up within an hour of me making the call on a Sunday. They fixed our system and taught us how to replace the fuse in the future. We would definitely call again.

John F.

I needed 2 new AC units and decided to go with high efficiency heat pumps. I chose Greenflow because of the equipment they offered, and the price (2nd lowest quote and much cheaper than the average of all quote we received). Their technicians were very detail oriented and...

View All