Lennox Alert Code 11 is a crucial indicator of a missing or failed communication with a previously installed system component. Categorized as a "Service Urgent" alert, it demands immediate attention due to its severity. This alert encompasses all communicating components of the HVAC system, highlighting their interdependence... Alert code 10. The Lennox iComfort thermostat when not in configuration mode has detected an unknown device. Clear the alert code by reconfiguring the system.. Alert code 11. The thermostat cannot find a previously installed system component. To clear alert code, cycle system power, and if the problem persists then clear by reconfiguring the.
Ensure You Get a Detailed HVAC Quote. When you're looking to replace your HVAC system, you'll meet with several contractors and gather quotes.. How to Clear Alert Code 11 from Your Lennox HVAC System. Clearing the Lennox Alert Code 11 involves a two-step approach that focuses on resetting the system's power and reconfiguring it if necessary. This process aims to restore communication with the missing device and ensure that all system components are functioning cohesively. To address.