R604221-01 | Door Switch/Interlock Switch | Armstrong Furnace Product Type_Assembly Vestibule EI Series 2B Choose Our HVAC supply store

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With a cold working pressure of 200 PSI

T&P Valve for Weil-McLain AquaPLUS85/105 Boilers (633-500-039) Protect your Weil-McLain AquaPLUS85/105 boiler with our replacement T&P relief valve

protecting against data loss and equipment damage

Semi-Flexible drive shaft connects to set point knobs

R604221-01 | Door Switch/Interlock Switch | Armstrong Furnace Product Type_Assembly Vestibule EI Series 2B Choose Our HVAC supply storeArmstrong 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