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Lennox Evaporator coil CK40[C,U]T-30/36C**

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Lennox Lennox AHRI Indoor - CK40CT/CK40UT indoor coil Evaporator coil Repair, maintenance, and replacement planning
Lennox CK40[C,U]T-30/36C** product image

Technical Specifications

Product Specs

  • AHRI unit role: Indoor
  • AHRI model/pattern: CK40[C,U]T-30/36C**+TDR
  • AHRI records represented: 20
  • AHRI equipment type: Central HP
  • AHRI tonnage: 2.85
  • AHRI refrigerant: R-454B
  • Verified catalog model: CK40[C,U]T-30/36C**+TDR
  • Verified product family: CK40CT/CK40UT indoor coil
  • Verified catalog brand: Lennox
  • Verified model family: CK40CUT
  • AHRI model/pattern: CK40[C,U]T-30/36C**+TDR
  • Nominal capacity: 2.5-3 ton
  • Capacity code: 30/36
  • Cabinet code: C
  • Configuration: cased or uncased indoor coil family 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 217677930

AHRI 217677930 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40[C,U]T-30/36C**+TDR.
Eligible Central HP <5.4 tons

AHRI 217677931

AHRI 217677931 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40[C,U]T-30/36C**+TDR.
Eligible Central HP <5.4 tons

AHRI 217677932

AHRI 217677932 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40[C,U]T-30/36C**+TDR.
Eligible Central HP <5.4 tons

AHRI 217677933

AHRI 217677933 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40[C,U]T-30/36C**+TDR.
Eligible Central HP <5.4 tons

AHRI 217677934

AHRI 217677934 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40[C,U]T-30/36C**+TDR.
Eligible Central HP <5.4 tons

AHRI 217677935

AHRI 217677935 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40[C,U]T-30/36C**+TDR.
Eligible Central HP <5.4 tons

AHRI 217677936

AHRI 217677936 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40[C,U]T-30/36C**+TDR.
Eligible Central HP <5.4 tons

AHRI 217677937

AHRI 217677937 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40[C,U]T-30/36C**+TDR.
Eligible Central HP <5.4 tons

AHRI 217677938

AHRI 217677938 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40[C,U]T-30/36C**+TDR.
Eligible Central HP <5.4 tons

AHRI 217677939

AHRI 217677939 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-036-230A** and indoor unit CK40[C,U]T-30/36C**+TDR.
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Service planning

How GreenFlow handles CK40[C,U]T-30/36C** 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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Ray

Just had a service call because my tankless water heater stopped working with E110 code. Andrey located the root cause real quick and fixed the issue within half an hour, also gave reasonable recommendations for further maintenance.

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.

Dev W.

I had a breakdown of my cooling system and Hanna at Green Flow responded to my request right away. They scheduled me same day. The team at Green Flow was easy to communicate with over phone and text. They kept me updated on delays on arrival of the...

Jahangir R.

They were very organized to communicate and be on time to come to look at my air condition to fix it.

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