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Lennox International Manuals & User Guides

Lennox provides innovative, energy-efficient climate control solutions, including premier heating, ventilation, air conditioning, and refrigeration (HVACR) systems.

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Lennox International

Lennox International is a leading provider of innovative and energy-efficient climate control solutions for both residential and commercial applications. For over a century, Lennox has been at the forefront of the heating, ventilation, air conditioning, and refrigeration (HVACR) industry. Their diverse product lines include robust furnaces, air conditioners, heat pumps, and indoor air quality systems designed to create comfortable, healthy environments.

Whether installing a residential AC unit or maintaining commercial rooftop units, Lennox emphasizes safety, performance, and sustainability. Given the complexity of HVAC systems, their equipment requires professional installation and care. Lennox supports its products with comprehensive user manuals, service guides, and instructional documents to ensure reliable and efficient operation by licensed professionals and informed homeowners.

Lennox International manuals

Selected manuals from manuals+ curated for this brand.

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Lennox ML196UHE Series Gas Furnace User Manual

October 23, 2026
Lennox ML196UHE Series Gas Furnace User Manual   ©2020 Lennox Industries Inc. Dallas, Texas, USA 507967-01 07/2020 Supersedes 07/2019 WARNING Improper installation, adjustment, alteration, service or maintenance can cause property…

LENNOX ML13KC1 Air Conditioner Installation Guide

October 15, 2026
LENNOX ML13KC1 Air Conditioner WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by a…

Lennox 15CB-Y Wiring Diagram Instructions

September 22, 2026
Lennox 15CB-Y Wiring Diagram 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…

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…

LGT092H Gas and Electric Packaged Rooftop Unit

Instruction Manual
LGT092H, LCT092H, LGT102H, LCT102H, LGT120H, LCT120H, LGT150H, LCT150H, LGT092H Gas and Electric Packaged Rooftop Unit, Gas and Electric Packaged Rooftop Unit, Packaged Rooftop Unit

LI012HI-160P433 SM 16 Seer Inverter

Owner's Manual
LI012HI-160P433, LI012HO-160P433, LI018HI-160P433, LI018HO-160P433, LI024HI-160P433, LI024HO-160P433, LI036HI-160P433, LI036HO-160P433, SM 16 Seer Inverter, SM 16 Seer, Inverter, LI012HI-160P433 SM 16 Seer Inverter

Lennox International support FAQ

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

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

    You can find user manuals, installation instructions, and service guides directly on the Lennox website or by searching for your specific model on Manuals.plus.

  • How do I contact Lennox customer support?

    You can reach Lennox customer support by calling 1-800-953-6669 or by using the contact form on their official website at lennox.com/contact-us.

  • Where can I look up my Lennox HVAC system warranty?

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

  • Can I install my Lennox replacement parts or systems myself?

    No. Lennox strongly recommends that all installation, adjustment, and service must be performed by a licensed professional HVAC installer or service agency to avoid property damage, personal injury, or voiding your warranty.