York S1-024-11772-700 Relay

The York S1-024-11772-700 Blower Control Relay is a heavy-duty switching component engineered for high-cycle performance in York, Coleman, and Luxaire air handlers and furnaces. As a vital 24V control relay, this part isolates low-voltage thermostat signals from high-voltage blower motor circuits, preventing control board feedback and potential processor damage. This direct HVAC blower relay replacement is designed to handle inductive loads typical of residential blowers, featuring silver-cadmium oxide contacts that resist pitting and arcing over time. When diagnosing a unit where the fan fails to cycle or remains energized after the call for cooling, this furnace relay S1-024-11772-700 is the primary diagnostic check for continuity. This HVAC contactor relay utilizes a standard mounting bracket for rapid field installation, ensuring the system returns to OEM airflow specifications without the need for rewiring harnesses. Relying on this authentic Johnson Controls HVAC part ensures the duty cycle matches the original system engineering for long-term reliability.

Key Benefits for Professionals

• Universal UPG Compatibility: Direct fit for most York, Luxaire, and Coleman residential platforms.
• Precision Coil Performance: 24VAC coil designed to operate within tight voltage tolerances to prevent chatter.
• Heavy-Duty Contacts: Rated for high-amperage inductive motor loads to prevent contact welding.
• Simplified Installation: Standard spade terminals and flange mounting allow for quick swaps in the field.

Common Technical Questions

Can this relay be used for heat pump applications?
Yes, this component is frequently used for auxiliary heat sequencing and indoor fan control in heat pump systems where a 24V pilot signal is required.

What are the symptoms of a failing blower relay?
Technicians should look for a "humming" noise from the control box, burnt contact smells, or a blower motor that will not turn off even when the thermostat is disconnected.

Is the coil polarity sensitive?
No, since this is a standard AC coil, polarity on the low-voltage side does not affect the switching mechanism, though following the original wiring diagram is recommended for consistency.

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.