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Environmental Protection: The NEMA 4 enclosure safeguards internal components against moisture and debris
For ducts wider than 4 feet
Precise 3/16" I
OEM Compatibility: Specifically designed for direct replacement in York
Lennox 66J78 Limit Switch Els PW 17895 Environmental Protection: The NEMA 4Experienced 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
