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Lennox Evaporator coil CK40DT-30/36B-**

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Lennox Lennox AHRI Indoor - CK40DT dedicated indoor coil Evaporator coil Repair, maintenance, and replacement planning
Lennox CK40DT-30/36B-** product image

Technical Specifications

Product Specs

  • AHRI unit role: Indoor
  • AHRI model/pattern: CK40DT-30/36B-**+TDR
  • AHRI records represented: 97
  • AHRI equipment type: Central HP
  • AHRI tonnage: 2.8333333333333335
  • AHRI refrigerant: R-454B
  • Verified catalog model: CK40DT-30/36B-**+TDR
  • Verified product family: CK40DT dedicated indoor coil
  • Verified catalog brand: Lennox
  • Verified model family: CK40DT
  • AHRI model/pattern: CK40DT-30/36B-**+TDR
  • Nominal capacity: 2.5-3 ton
  • Capacity code: 30/36
  • 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

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Eligible Central HP <5.4 tons

AHRI 216769598

AHRI 216769598 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40DT-30/36B-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217189879

AHRI 217189879 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40DT-30/36B-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217189880

AHRI 217189880 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40DT-30/36B-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217189881

AHRI 217189881 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40DT-30/36B-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217189882

AHRI 217189882 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40DT-30/36B-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217189883

AHRI 217189883 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40DT-30/36B-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217449931

AHRI 217449931 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40DT-30/36B-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217449932

AHRI 217449932 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40DT-30/36B-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217449933

AHRI 217449933 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40DT-30/36B-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217449934

AHRI 217449934 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40DT-30/36B-**+TDR.
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Service planning

How GreenFlow handles CK40DT-30/36B-** 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.

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Thanks to Andrey for an amazingly quick response to my request for a service call. He diagnosed and fixed my issue within 24 hours of my asking for help. Excellent service. Thanks.

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