York S1-024-19082-740 Sequencer Relay

The York S1-024-19082-740 Sequencer Relay is a heavy-duty, field-proven 24V heat sequencer relay designed to manage stage activation in electric furnaces and air handlers. Utilizing a solid-state positive temperature coefficient (PTC) heater and bimetallic discs, this control ensures precise, staggered firing of heating elements to prevent high inrush currents and potential circuit breaker trips. It functions by converting a low-voltage signal from the thermostat control into a timed sequence of high-voltage loads, protecting the electrical integrity of the system while maintaining consistent airflow by delaying the blower motor until the coils are preheated. In the HVAC electric furnace environment, this sequencer is essential for uniform temperature distribution and protecting line voltage components from premature wear. As a genuine OEM York replacement part, it offers exact fitment for compatible rooftop units and residential air handlers, ensuring reliable contact closure and snap-action separation for arc suppression in high-demand heating applications.

• Staged Element Activation: Prevents electrical grid overloads and nuisance tripping by staggering the startup of multiple heating banks.
• Integrated Fan Control: Delays blower engagement to ensure air is warm before distribution, improving occupant comfort.
• Robust PTC Heater: Features a self-current limiting solid-state heater for stable operation across a broad range of ambient temperatures.
• Heavy-Duty Contacts: Engineered with a snap-action bimetal disc design to provide high-speed separation and reduce contact arcing.
• Broad System Compatibility: Designed as a direct drop-in for York S1-024-19082-740 and various cross-referenced heat pump and electric furnace models.

• Can this sequencer replace other brands? While widely compatible, always verify the specific timings and terminal arrangements against your original 24V furnace sequencer to ensure safe operation.
• What are the signs of a faulty sequencer? Most common failures involve elements staying energized after the call for heat ends or fans failing to engage after elements have warmed up.
• Is this suitable for multi-stage systems? Yes, the York S1-024-19082-740 is specifically designed to handle the sequencing requirements of multi-stage electric heat packages.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.