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The Lennox 68W88 is an OEM float switch kit (model E1SNSR71AD1) designed to detect rising condensate levels in Lennox HVAC systems and trigger a shutdown before overflow occurs, protecting your home or building from water damage. This complete kit includes the necessary components for a straightforward replacement, minimizing downtime during service. If your Lennox system is nuisance-tripping, displaying drain-related fault codes, or showing signs of condensate backup, replacing this float switch kit is a recommended first step.