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The Lennox 10F68 is a genuine OEM electronic condensate overflow switch with a 1.32 cubic foot capacity, designed to detect rising condensate levels and shut down the Lennox system before water damage or overflow can occur. Signs of a failing 10F68 include nuisance shutdowns, failure to detect overflow, or water leaking from the drain pan without triggering a system shutdown. This direct OEM replacement ensures reliable protection for compatible Lennox air handlers and cooling systems.