Find the right part faster
Multiple models matched. Select your model to confirm fit.

Thermostat
Ensure your Lennox furnace operates efficiently with genuine OEM defrost thermostat parts from Repair Clinic. A crucial part for maintaining optimal performance, the defrost thermostat prevents the coils from freezing, ensuring your furnace heats effectively. Whether dealing with common issues like the furnace not heating or the blower motor not running, having a reliable defrost thermostat is essential. Our selection of Lennox furnace parts, including the defrost thermostat, provides peace of mind with durable, high-quality parts. For homeowners and technicians, Repair Clinic offers a vast inventory, same-day shipping, and expert repair guidance to support your furnace maintenance needs. Explore related parts like the Lennox furnace control board or Lennox igniter replacement to ensure complete system reliability.
Ensure your Lennox furnace functions optimally with quality defrost thermostat parts from Repair Clinic. When your furnace struggles to heat, a faulty defrost thermostat could be the issue. Order by 9:00 PM ET, and we'll ship your replacement parts the same day, helping you restore comfort quickly. Common problems like igniter issues or gas supply interruptions are critical to address, but a defrost thermostat plays a vital role in maintaining your system's efficiency. Rely on Repair Clinic for genuine OEM parts and extensive repair resources, empowering both DIY enthusiasts and professionals to tackle furnace repairs confidently. Explore our HVAC parts and get your Lennox furnace back in top shape without delay.


Ensure your Lennox furnace operates efficiently with our genuine Defrost Thermostat replacement parts. Our easy-to-navigate online platform allows you to find the right thermostat by simply entering the part or model number. Benefit from our No-Hassle 365-Day Returns, providing peace of mind for any uninstalled parts. Plus, with our Price Match Guarantee, you can shop confidently knowing we offer competitive pricing on all genuine OEM parts. Order by 9:00 PM ET for same-day shipping, and have your Lennox furnace back in top shape in no time. Visit our replacement parts page for more options.
Identifying your furnace model number is essential for finding compatible parts and accurate repair help. Watch this video for tips on locating the model number, and visit our website's furnace repair section for troubleshooting tips, part testing guides, and part replacement videos tailored to your specific furnace.

Need help finding the right furnace parts? Repair Clinic's trained customer care specialists are available 7:00 AM to midnight EST, seven days a week. Whether you have questions about part compatibility or need assistance placing an order, our experts are here to help. The Repair Clinic customer care team is dedicated to ensuring your furnace is back in working order quickly and efficiently.

A furnace that fails to ignite can leave your home in the cold. Common issues include a faulty igniter, malfunctioning flame sensor, or a defective draft inducer fan motor. Replacing furnace filters and cleaning furnace parts can help prevent these problems.

Learn why your furnace isn't working by understanding its ignition sequence and identifying common faulty parts like the igniter, flame sensor, or control board. This article provides practical repair tips and insights into each component's role in the heating process.

A gas furnace that starts and then stops unexpectedly can be frustrating, especially during cold weather. This article explains five common causes, including issues with the flame sensor, pressure switch, control board, draft inducer fan motor, or air flow. Learn how each cause may impact your furnace's operation and get tips to resolve the problem.