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Chrome-bevel sheet on grid paper — specs and return notes filed under the bay.
Always use the specified 175-200F range for this ICP series to maintain engineered safety margins
this key is the direct replacement for standard Honeywell locking covers and is technically identical to the Honeywell 301572A/0767/U model number
Common Questions: How do I confirm the 590-317-579 is the correct fit for my boiler
Hermetically Sealed: Robust construction prevents leak paths and maintains electrical integrity in harsh environments
Why use OEM gaskets over generic options
Lennox 66J78 Limit Switch Els PW 17895 Always use the specified 175-200FExperienced 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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