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maintaining the original safety circuit integrity without field modifications
ensuring reliable contact closure even during minor voltage fluctuations
Tool-Free Installation: Designed to lock securely into the detector housing with standard locking tabs for fast
verify compatibility with specific 4-wire sub-bases
Armstrong Furnace R604221-01 Switch maintaining the original safety circuitThe Armstrong Furnace R604221 01 Door Switch is a critical safety interlock component designed for modern HVAC systems. This furnace door safety switch functions as a primary disconnect, ensuring the blower motor and burner assembly cannot operate when the service panel is removed. Engineered to withstand high cycle operations, this interlock switch replacement serves as a direct OEM component for Armstrong, AirEase, and Ducane units. Proper
US$ 160.00
US$ 180.00
US$ 195.00
US$ 195.00