Armstrong Furnace R07489B003 Relay

The Armstrong Furnace R07489B003 Relay is a critical 24V electromechanical component designed for precise switching in residential heating systems. This HVAC blower relay serves as a direct replacement for specific Armstrong and Concord furnace models, ensuring reliable signal transmission between the thermostat and the high-voltage blower motor or inducer. Operating on a 24VAC coil voltage, this relay is engineered for high-duty cycles, managing the inductive loads typical of single-stage gas furnaces. Maintaining a functional furnace control relay is essential for proper sequencing; a failing unit often results in intermittent blower operation or a complete loss of heat. For contractors performing Armstrong furnace troubleshooting, the R07489B003 provides a standard mounting footprint and spade terminal connections for straightforward field installation. This OEM-equivalent component ensures your system maintains its original factory specifications and timing sequences, preventing premature wear on larger system components like the heat exchanger.

• Direct Compatibility: Engineered specifically for Armstrong and Allied Air equipment for precise fitment.
• Reliable Switching: Built to handle the high-amperage startup current of furnace blower motors.
• Durable Construction: Features heavy-duty contacts to resist pitting and carbon buildup over time.
• Standardized Terminals: Utilizes 1/4-inch male spade connectors for fast, secure wiring.

Common HVAC Questions

What are the symptoms of a bad R07489B003 relay?
Common indicators include the blower motor failing to start, the blower running continuously even when the thermostat is off, or a distinct "clicking" sound coming from the control board without component activation.

Can I use this relay on 120V control circuits?
No, this is a 24V relay designed for the low-voltage control side of the HVAC system. Applying 120V to the coil will result in immediate component failure.

Does this replace the R07489-003?
Yes, the R07489B003 is the current technical designation for this specific sequence relay used in Armstrong and Allied Air furnace models.

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.