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Lennox Manuals & User Guides

Lennox provides industry-leading, energy-efficient heating, cooling, and HVAC solutions for residential and commercial spaces.

Tip: include the full model number printed on your Lennox label for the best match.

About Lennox manuals on Manuals.plus

Lennox Industries is a leading manufacturer of high-efficiency HVAC systems, air conditioners, heat pumps, and furnaces. Known for their pursuit of creating perfect indoor air quality, Lennox offers a wide range of residential and commercial climate control solutions.

The brand focuses on energy-efficient technology, innovative home comfort systems, and comprehensive support to ensure optimal temperature control in any environment.

Lennox manuals

Latest manuals from manuals+ curated for this brand.

Lennox 15CB-Y Heating-Electric Instructions

September 22, 2026
Electric Heating Unit Installation Use the provided cut size and component layout to install the electric heating unit with correct wiring practices, including using copper conductors and appropriate circuit protection…

LENNOX ComfortSense 7500 Commercial Thermostat User Guide

September 22, 2026
Comfort Sense® 7500 Commercial Thermostat User Guide 507505-02 6/2018 Supersedes 5/2017 Features The Comfort Sense® 7500 Series thermostat is an electronic 7-day, universal, multi-stage, programmable, touchscreen thermostat. supports commercial package…

Lennox E40 Energy-Efficient Thermostat User Manual

September 22, 2026
Lennox E40 Smart Wi‑Fi Thermostat Overview The Lennox E40 is a smart, programmable 7-day touchscreen thermostat with Wi‑Fi connectivity. It supports multi-stage heating/cooling and enhanced indoor comfort features such as…

LENNOX SL297UHNVK Series Gas Furnace User Manual

September 19, 2026
LENNOX SL297UHNVK Series Gas Furnace ⚠ WARNING: A2L Refrigerant DetectionThis furnace is equipped with an ignition control factory-enabled for use with Lennox A2L refrigerant systems. Disabling the refrigerant detection functionality…

LENNOX 5500 ComfortSense Thermostat User Guide

September 19, 2026
LENNOX 5500 ComfortSense Thermostat Overview The ComfortSense® 5500 Series thermostat is a touchscreen, electronic 7-day programmable thermostat with features such as smooth setback recovery, compressor short-cycle protection, real-time clock backup,…

LENNOX LF25-30-105 Compact Unit Heater User Manual

September 17, 2026
LENNOX LF25-30-105 Compact Unit Heater SPECIFICATIONS SPECIFICATIONS Gas Heating Performance Model No. LF25-30A LF25-45A LF25-60A LF25-75A LF25-90A LF25-105A Heating Capacity Input Btuh 30,000 45,000 60,000 75,000 90,000 105,000 Heating Capacity…

Wiring Diagram: Single Speed Heat Pump

wiring diagram
Technical wiring diagram and component legend for Lennox single-speed heat pump units. Includes detailed connection schematics and safety installation notes.

LGT-LCT156H Rooftop Packaged Units

Installation Guide
LGT-LCT156H, LGT-LCT180H, LGT-LCT210H, LGT-LCT240H, LGT-LCT300H, LGT-LCT156H Rooftop Packaged Units, LGT-LCT156H, Rooftop Packaged Units, Packaged Units

LDT078 Ldt Dual Fuel Rooftop HVAC Units

Instruction Manual
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L Rooftop Units Catalog

Datasheet
LTM, ENLIGHT, XIONTM, LGM, LCM, LGT, LCT, LHT, LDT, LGX, LCX, LHX Formerly K C, ZGD, ZCD, ZHD, L Rooftop Units Catalog, Rooftop Units Catalog, Rooftop Units

LDT Enlight Rooftop Unit

Instruction Manual
L D T 102 H 5 E S 2 Y, LDT Enlight Rooftop Unit, LDT, Enlight Rooftop Unit, Rooftop Unit, Unit

Lennox manuals from online retailers

Lennox 67K65 DPDT 24-Volt AC Relay Instruction Manual

67K65 • April 11, 2026
Instruction manual for the Lennox 67K65 DPDT 24-Volt AC Relay. This document provides essential information for setup, operation, maintenance, and troubleshooting of this genuine OEM replacement part.

Lennox 59M51 Blower Motor Instruction Manual

59M51 • March 20, 2026
Instruction manual for the Lennox 59M51 Blower Motor, providing detailed guidance on installation, operation, maintenance, and troubleshooting for this essential HVAC component.

Lennox support FAQ

Common questions about manuals, registration, and support for this brand.

  • Where can I find the manual for my Lennox HVAC system?

    Product manuals and documentation can be found in the owner's resource area on the official Lennox website.

  • How do I check the warranty on my Lennox equipment?

    You can verify your coverage using the warranty lookup tool on the Lennox website at lennox.com/residential/owners/assistance/warranty/.

  • What is Lennox Warranty Your Way?

    Warranty Your Way is a limited warranty offering that provides customizable system coverage for parts and labor, including an option for three-year labor coverage at no additional cost.

  • How can I find a qualified Lennox technician?

    You can find local, experienced Lennox air conditioner and furnace dealers using the dealer locator tool on the official Lennox website.