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Lennox Evaporator coil CK40HT-51/61C-**

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Lennox Lennox AHRI Indoor - CK40HT horizontal indoor coil Evaporator coil Repair, maintenance, and replacement planning
Lennox CK40HT-51/61C-** product image

Technical Specifications

Product Specs

  • AHRI unit role: Indoor
  • AHRI model/pattern: CK40HT-51/61C-**+TDR
  • AHRI records represented: 163
  • AHRI equipment type: Central HP
  • AHRI tonnage: 4.416666666666667
  • AHRI refrigerant: R-454B
  • Verified catalog model: CK40HT-51/61C-**+TDR
  • Verified product family: CK40HT horizontal indoor coil
  • Verified catalog brand: Lennox
  • Verified model family: CK40HT
  • AHRI model/pattern: CK40HT-51/61C-**+TDR
  • Nominal capacity: 4-5 ton
  • Capacity code: 51/61
  • Cabinet code: C
  • Configuration: horizontal 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 216769620

AHRI 216769620 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-060-230A** and indoor unit CK40HT-51/61C-**+TDR.
Eligible Central HP <5.4 tons

AHRI 216769621

AHRI 216769621 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-060-230A** and indoor unit CK40HT-51/61C-**+TDR.
Eligible Central HP <5.4 tons

AHRI 216769622

AHRI 216769622 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-060-230A** and indoor unit CK40HT-51/61C-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217189970

AHRI 217189970 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-060-230A** and indoor unit CK40HT-51/61C-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217189971

AHRI 217189971 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-060-230A** and indoor unit CK40HT-51/61C-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217189972

AHRI 217189972 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-060-230A** and indoor unit CK40HT-51/61C-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217189973

AHRI 217189973 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-060-230A** and indoor unit CK40HT-51/61C-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217189974

AHRI 217189974 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-060-230A** and indoor unit CK40HT-51/61C-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217189975

AHRI 217189975 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-060-230A** and indoor unit CK40HT-51/61C-**+TDR.
Eligible Central HP <5.4 tons

AHRI 217189976

AHRI 217189976 identifies a Mass Save qualified Central HP <5.4 tons from LENNOX with outdoor unit EL18KSLV-060-230A** and indoor unit CK40HT-51/61C-**+TDR.
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Service planning

How GreenFlow handles CK40HT-51/61C-** 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.

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

Jack B.

Andrey always does a great job.

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...

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