Does this gasket require additional RTV or sealant

As a primary limit switch

Does this board require a separate wiring harness

High-Visibility Identification: The distinctive orange stripe on a black jacket simplifies wire-tracing and prevents cross-connection errors

Utica-Dunkirk 40300004 Fire Door 30067439-890 Does this gasket require additionalThe Utica Dunkirk 40300004 Fire Door is a critical replacement component engineered for specific boiler configurations within the ECR International family. Designed to withstand extreme combustion chamber temperatures, this cast iron access door ensures a precise airtight seal, maintaining optimal pressure and preventing heat loss. As a direct OEM replacement part, it is essential for maintaining the structural integrity of the burner mounting area.