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The Armstrong International A21959-1 is a critical replacement steam trap gasket engineered specifically for A6 and B6 Series Float & Thermostatic (F&T) traps
it is designed for use in systems handling natural
OEM Compatibility: Serves as the official B1256552 replacement for Goodman
Features high-grade internal components for reliable compressor motor starting
making it future-proof for systems transitioning to low-GWP refrigerants
York S1-025-41100-000 Crankcase Heater The Armstrong International A21959-1 isAs a service tech, you know that keeping the compressor oil at the correct temperature during the off cycle is critical for system longevity. The York S1 025 41100 000 Crankcase Heater is a rugged belt type crankcase heater designed to prevent refrigerant migration and oil foaming. Operating at 240 volts with a 70 watt output, this heater provides consistent thermal energy to ensure the HVAC compressor remains protected in cold ambient conditions.