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this is an OEM part 100208384 used by both manufacturers in various high-efficiency hydronic and domestic hot water applications
the internal diaphragm or seat may be stuck
It allows the fuse to carry a brief overload—such as when a contactor coil or transformer is first energized—without opening the circuit
Replacing a failed furnace heat exchanger restores system pressure and prevents the rollout or inducer limit trips common in older 90% plus AFUE models
Nordyne 664275R TXV 322838-753 this is an OEM partThe Nordyne 664275R TXV is a critical N Series thermal expansion valve engineered specifically for 5 ton packaged units. Designed for R410A refrigerant, this OEM component provides precise metering to maintain the correct superheat across the evaporator coil, preventing liquid slugging and ensuring compressor longevity. As a direct Nordyne replacement part, it eliminates the compatibility issues often found with universal aftermarket valves,
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