The York S1-025-31830-000 Limit Switch is a critical safety component designed for precise thermal regulation in commercial and residential HVAC systems

This 24V heat sequencer features four distinct timings that provide a staggered start-up and shut-down sequence (1-160 seconds)

Precision Fitment: Components are machined to exact tolerances for ASCO 8040 series compatibility

the VAL9030 manages low-fire and high-fire manifold pressures to maintain precise thermal equilibrium and reduce short-cycling

Robertshaw 720-051 Gas Valve R-410A The York S1-025-31830-000 Limit SwitchThe Robertshaw 720 051 Gas Valve is a 24V HSI Uni Kit designed for versatile performance in Hot Surface Ignition (HSI) applications. Featuring a 1 2" inlet and 3 4" outlet, this dual automatic gas valve serves as a reliable replacement for a wide range of OEM furnace controls. With a compact 3 9 16" swing radius, it fits easily into tight furnace cabinets where space is a premium. The unit is factory set for Natural Gas at 3. 5" W. C. but includes an