R604221-01 | Door Switch/Interlock Switch | Armstrong Furnace Product Type_Assembly Vestibule EI Series 2B Semi-Flexible drive shaft connects to

Semi-Flexible drive shaft connects to set point knobs

With a cold working pressure of 200 PSI

protecting against data loss and equipment damage

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R604221-01 | Door Switch/Interlock Switch | Armstrong Furnace Product Type_Assembly Vestibule EI Series 2B Semi-Flexible drive shaft connects toArmstrong Furnace Door Switch Interlock Switch (R604221 01) This Armstrong Furnace Door Switch Interlock Switch (R604221 01) is an essential component designed to ensure safety and proper operation of your furnace system. Engineered to meet rigorous standards, it acts as a vital safeguard, preventing the furnace from operating when the access door is open. Specifically engineered for Armstrong furnaces, this switch features a durable construction that