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Are the threads standard NPT
this limit control integrates seamlessly into the furnace’s formal safety string
What causes a furnace limit switch to trip repeatedly
Industrial Durability: Heavy-gauge material construction prevents flexing under load
it is fully compatible with standard D-9999-104 ball joints and other JC linkage hardware
York S1-025-38970-000 Limit Switch Are the threads standard NPTEnsure precise thermal safety and reliable burner modulation with the York S1 025 38970 000 Limit Switch. This factory authorized OEM limit control is vital for protecting the furnace heat exchanger from overheating conditions. Engineered for rapid response, this auto reset limit switch features a critical temperature profile with a 130F opening setpoint and a 100F closing setpoint. Designed specifically for compatibility with York GY8S furnace models