Commercial HVAC Technical Support at Your Fingertips
Discover quick-reference guides and simple solutions for technical and product questions all in one place. Use these resources to troubleshoot and self-diagnose issues. If you need further support from a Lennox technical support expert, please call us or complete the technical support request form.
Commercial Support:1.800.4.LENNOX
National Account Support: 1.800.367.6285
Self-Help Center
Use these quick links to self-diagnose issues.
CONNECT
Technical Support
We're with you every step of the way. Choose from the options below and a dedicated team member will be in touch soon with support.
Request Technical Support
This form is the quickest way to open a technical support ticket for Commercial equipment. Once submitted, the details will be routed to our Commercial Technical Support teams and we will reach out the same business day in most cases. Please include all details, pictures and or videos so we can quickly assist you. This form is for Commercial Equipment only. For Residential Tech Support please call 1-800-453-6669.
Monday - Friday 8 am-5 pm CST. Closed for lunch from 12-1 pm CST.
Additional Resources
Download the apps below to access the answers to many of your technical questions with no wait, 24-7.
Lennox® CORE Service App
This app acts as a technician interface for the Lennox® CORE Unit Controller.
Subscribe to Stay Connected with Lennox Commercial
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