York S1-2940-3551 Relay

The York S1-2940-3551 Relay is a specialized 24V 3-pole plug-in heat relay engineered for precise switching in residential and light commercial HVAC systems. This HVAC contactor relay functions as a critical interface between low-voltage control circuits and high-voltage heating components, ensuring reliable load management. Designed for 24VAC coil operation, the S1-2940-3551 features a robust 3-pole configuration that allows for multi-circuit control or staged heating applications. As a direct OEM York replacement part, it maintains the precise electrical characteristics required for seamless integration into York furnace control boards and air handlers. The plug-in design simplifies field installation and troubleshooting, reducing downtime during critical heating failures. This relay provides the necessary amperage capacity to handle resistive heating loads while maintaining thermal stability under continuous operation. When replacing a York heat relay, utilizing this genuine component ensures correct voltage response times and protects the upstream control transformer from excessive inrush current.

• Direct OEM Compatibility: Verified York replacement part ensures exact physical fit and electrical alignment with existing wiring harnesses.
• High-Reliability Switching: Engineered with durable contact points to prevent pitting and sticking under high-cycle heating demands.
• Simplified Installation: The plug-in architecture allows for rapid swaps without the need for complex terminal re-mapping or custom mounting.
• 3-Pole Versatility: Provides the flexibility to control multiple terminal loads or isolate circuits within the heating sequence.

Can this relay replace a 2-pole unit?
While a 3-pole relay provides additional contacts, it is essential to match the 24V coil voltage and ensuring the physical footprint matches the mounting base to maintain system safety and logic.

What causes typical failure in these plug-in relays?
Failure is often attributed to contact oxidation or coil burnout. Using the S1-2940-3551 ensures the inductive load ratings match the original equipment design, preventing premature failure.

Is a mounting base included?
This is the plug-in relay component only. It is designed to seat into an existing 3-pole socket or base within the furnace or control panel.

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.