or insufficient combustion air—it breaks the 24V circuit to the gas valve

utilizing a spring-actuated mechanism for consistent set-point accuracy

the unit replaces Trane 7021-11543 and 7021-11543S

you must verify the specific part number as those often require silicone or high-temp variants

the Evergreen EM series is specifically designed to replace constant torque ECM motors (like the X13)

York S1-026-25573-002 Accumulator R-22 or insufficient combustion air—it breaksProfessional grade York S1 026 25573 002 Suction Line Accumulator designed for mission critical liquid slugging protection in commercial and residential HVACR systems. This heavy duty 7 8" ODF connection vessel features a 125 oz capacity, providing an ample reservoir to manage refrigerant floodback during low load conditions or defrost cycles. Engineered with a robust steel shell and an internal U tube assembly, it ensures precise refrigerant oil