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Regular inspections of the sealing flange help identify signs of extrusion or aging before leaks develop
For newer R-410A systems
excessive cycling
Common indicators include the furnace failing to ignite
Reznor 85449 Limit Switch Regular inspections of the sealingThe Reznor 85449 is a critical safety component designed for precise thermal regulation in commercial gas fired unit heaters and furnaces. This 140 200F Auto Limit Switch monitors internal air temperatures, functioning as a primary high limit safety by interrupting the burner circuit if the heat exchanger surpasses the 200F threshold. As an OEM replacement part, it ensures seamless compatibility with Reznor UDAP, UDAS, and UDX series heaters,
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