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The Lennox 92L19, also referenced as part number 20294301, is a genuine OEM temperature switch designed for use in Lennox HVAC systems to monitor and respond to critical temperature conditions, protecting components from thermal damage. A failing temperature switch may cause your Lennox system to shut off unexpectedly, fail to heat or cool properly, or trigger fault codes indicating a temperature-related malfunction. This direct OEM replacement part restores proper system protection and performance with guaranteed compatibility for applicable Lennox equipment.