York S1-024-19082-022 Sequencer Relay

The York S1-024-19082-022 Sequencer Relay is a heavy-duty 24V heat sequencer designed for precise multi-stage control in electric furnaces and air handlers. Engineered as a high-performance OEM replacement part, this time delay relay utilizes a 24VAC resistive heater and bi-metal disc to stagger the activation of heating elements. By sequencing the inductive load of the blower motor and the resistive load of the heat strips, the S1-024-19082-022 prevents hazardous electrical inrush and protects the primary circuit breaker from tripping during startup.

This York-compatible sequencer features a single-pole single-throw (SPST) configuration, typically functioning with a 1 to 20 second "on" delay and a 40 to 120 second "off" delay to ensure consistent thermal regulating and airflow across the heat exchanger. For HVAC contractors, its robust terminal construction and compact footprint allow for vertical or horizontal mounting in standard control cabinets. This furnace relay is critical for maintaining system compatibility and ensuring that heating stages cycle according to the demand of the low-voltage thermostat signal.

• Staged Activation: Prevents catastrophic amperage spikes by staggering electric heat strip startups.
• OEM Precision: Direct York S1-024-19082-022 replacement ensures exact timing and terminal alignment.
• Silent Operation: Internal bi-metal mechanism eliminates the loud chatter found in standard mechanical contactors.
• Enhanced Safety: Built-in time delay prevents short cycling and protects domestic power distribution.
• Versatile Application: Suitable for a wide range of packaged units and residential electric furnace control systems.

How do I test the S1-024-19082-022 sequencer with a multimeter?
With the power disconnected, check for continuity across the 24V heater pins (the bottom terminals). An open reading indicates a failed internal heater. To test the contacts, apply 24V to the heater and monitor the top terminals for continuity after the specified delay.

What causes a heat sequencer to fail prematurely?
Excessive amperage draw from damaged heating elements or high resistance at the terminals often leads to pitted contacts or a burnt-out bi-metal heater. Always verify the Full Load Amps (FLA) of the controlled load matches the relay’s rating.

Can I use this relay as a universal substitute?
While functionally similar to many time delay relays, always verify the voltage rating and specific timing sequence (H1-20/C40-120) to ensure the blower motor engages before the heat strips reach maximum temperature.

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.