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high voltage surges
providing a replacement or expansion solution for high-capacity timing applications
OEM Compatibility: Specifically designed for direct replacement in York
Environmental Protection: The NEMA 4 enclosure safeguards internal components against moisture and debris
Always verify your specific model number against the factory parts list
Lennox 66J78 Limit Switch Els PW 17895 high voltage surgesExperienced HVAC contractors recognize the Lennox 66J78 Limit Switch as a critical safety component for maintaining furnace integrity and preventing heat exchanger damage. This OEM Lennox replacement part is a 36T series disc style control designed for High Limit or Secondary Rollout applications. It features a Normally Closed (NC) circuit that opens on temperature rise to interrupt the heating cycle if internal temperatures exceed safe operating
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