York S1-025-27727-001 Limit Switch Direct OEM Compatibility: Serves as

Direct OEM Compatibility: Serves as the official successor to 624721 and 621957

Repeated tripping at 200°F usually indicates a broader system issue such as a dirty air filter

This 2-stage relay typically provides an on-timing delay of 1 to 20 seconds and an off-timing delay of 40 to 110 seconds to protect heating elements

This industrial-grade fiberglass insulation tape is designed to withstand the thermal stresses common in furnace blower assemblies and air handlers

If your current Maxitrol RV111 regulator is cycling or failing to maintain a stable 2-5" WC outlet pressure under load

York S1-025-27727-001 Limit Switch Direct OEM Compatibility: Serves asThe York S1 025 27727 001 is a critical HVAC replacement limit switch designed for precision thermal monitoring in residential and commercial climate control systems. This SPST auto reset limit switch operates within a tight 25F to 41F temperature range, ensuring the system maintains safe operating parameters during cooling and heating cycles. Engineered as a genuine York OEM furnace part, it is frequently utilized in single duct applications and